FOK!forum / Weer, Klimaat en Natuurrampen / [Vulkanen] The ring of fire #6: Waar diverse vulkanen puffen
Frutseldonderdag 14 juli 2011 @ 11:48
De vorige deeltjes
[vulkanen] The ring of Fire
[Vulkanen] The ring of Fire #2:
[Vulkanen] The ring of Fire #3: Eruption of Mayon?
[Vulkanen] The ring of fire #4: Veel aktiviteit!
[Vulkanen] The ring of fire #5: Het blijft actief

In dit en komende topics, zal informatie gegeven worden over vulkanen door enthousiaste Fokkers!, en iedereen die wat weet over vulkanisme, mag hier z'n bijdrage erbij toevoegen.

Hoofdzakelijk zijn het de aardse vulkanen in belangstelling staan. Maar als er op een andere planeet/maan vulkanische aktieviteiten Zijn, dan mag het hier ook terzake komen.

Mocht er een zeer heftige/gewelddadige uitbarsting van een vulkaan plaatsvinden komt er naast dit topic ook nog een eigen topic.

De Aarde
Er zijn bergen, eilanden, en zeen. En alles op een laag (aardkorst) van ongeveer 35 kilometer dikte.

De aardkorst
Al miljoenen jaren is de aardkost in beweging Door zijn aardbevingen, en er zijn vulkanen laat de aarde merken dat ie nog altijd actief is. De aardkorst bestaat niet uit n groot stuk maar uit een stuk of 9 grote en nog een aantal kleinere tektonische platen. Deze platen drijven op een vloeibare mantel.

En omdat die platen niet allemaal dezelfde kant opgaan. Komt het er op de plaatsen waar ze zich ontmoeten toe tot hevige botsingen. Op deze plekken kunnen zich ook de meeste vulkanen vormen.

De bekendste term wat betreft vulkanen is toch wel de Ring of Fire. Deze 'circel' omvat zon beetje de hele StilleOceaan waar n grote aardplaat tegen diverse andere botst en rondom die plaat bevinden zich de meeste actieve, maar ook gevaarlijkste, vulkanen.

Ring of Fire
ringfire.gif

De Mantel
De aardmantel of kortweg mantel is de laag in de opbouw van de Aarde die direct onder de korst ligt. De mantel begint op enkele tientallen kilometers diepte, en is ongeveer 2900 km dik. Ze neemt 83% van het volume van de Aarde in en bevat 67,5 % van haar massa.
vulkanisme.gif
2225_320.gif

Soorten vulkanen
Er zijn 6 verschillende soorten vulkanen.

De spleetvulkaan
Een lange scheur in de aardkorst waardoor magma naar buiten komt. Deze ontstaat als twee tektonische platen uit elkaar drijven. Je vindt deze vooral bij oceaanruggen.

De schildvulkaan
Dit is een brede, ondiepe vulkaankegel, die ontstaat doordat het lava dat eruit stroomt, dun en heet is en heel langzaam afkoelt.

De koepelvulkaan
Deze kent een steile, bolle helling die gevormd is door dikke snel afkoelende lava.

De slakkenkegel
Een vulkaan die naast lava ook veel as uitspuugt. De berg die door deze vulkaan gevormd wordt, is dan ook opgebouwd uit lagen as en lava die elkaar afwisselen.

De samengestelde vulkaan
Deze is net zo opgebouwd als de slakkenkegel maar heeft naast de hoofdkrater nog meerdere kleinere kraters op haar flanken.

De calderavulkaan
Dit is een oudere vulkaan met aan de bovenkant een grote brede krater. In deze krater hebben zich weer kleinere nieuwe kraters gevormd.

Hotspots
Doordat een zeer hete brandhaard (hot-spot) in de mantel, door de aardkorst heen brandt.

Andere vormen van vulkanisme zijn de geisers en de hete bronnen. Die vind je vaak in de buurt van vulkanen waar de aardkorst dunner is en de warmte van het magma verder doordringt in de aardkorst. Een geiser is een holte in de aardkorst of een waterhoudende grondlaag, die door het onderliggende magma wordt verwarmd tot het kookpunt. Het water kan dan tot 500 meter in de lucht spuiten. Een hete bron werkt op dezelfde manier alleen wordt het water daar niet zo verhit, dat het onder druk van stoom eruit spuit.

Heeft Nederland een vulkaan?
Jazeker! De naam ervan is Zuidwalvulkaan, en ligt 17km ten westen van Harlingen
maar ... die is letterlijk allang dood en begraven. Deze ligt namelijk vele honderden meters onder de bodem van de huidige Waddenzee.

Links
Status vulkanen Indonesie *NEW*
Volcano webcams all over the world
BBC-How volcanoes work
(Nieuws-)Updates van Vulkaanjager Jon Seach
Global Volcanism Program
Volcano Discovery
Live Science - Volcanoes
37 Volcano Cams
Vulkanen.nl
Mediatheek - Vulkanen
vulkaan.startpagina.nl
Kennislink (Zuidwal vulkaan)
Vulkanen in de Eifel (Duitsland)
Planet-wissen [vulkanen](Duitstalig)

Foto's
Meest spectaculaire vulkaanuitbarstingen op foto

Verwante (aktuele) WKN-vulkaantopics
Uitbarsting El Hierro Canarische Eilanden
Vulkaanuitbarsting Chili
Tungaruhua Ecuador
Vulkanen IJsland #18
De Riftvallei, Nieuwe oceaan kan Afrika in tween splitsen

Archief en Verzamel topics
Krakatoa
Etna
Supervulkaan Yellowstone #2
Supervulkaan Yellowstone #1
Uitbarsting Merapi 2010
Supervulkaan bij Napels
Mount St.Helens

Deze OP in Fok!Wiki
Klik hier

[ Bericht 1% gewijzigd door Frutsel op 07-12-2011 13:53:26 ]
Frutseldonderdag 14 juli 2011 @ 11:50
Laatste nieuws uit vorige deel

WIN EEN DVD-BOX
Win een DVD-box over De Grootste Natuurrampen

LOKON - Indonesie
quote:
Meer dan 2000 gevacueerd rondom Lokon
JAKARTA - Meer dan 2.000 mensen zijn ge-evacueerd nadat de Lokon vulkaan in het noordelijke puntje van Sulawesi tot uitbarsting is gekomen. Dit meldden functionarissen woensdag.

Het hoofd van het Agentschap Beheersing Rampen BPBD, Hoyke Makarawung, liet aan Antara weten dat er inmiddels 2.116 mensen van de hellingen van de vulkaan waren geevacueerd. Alle evacuees zijn naar dorpen in de directe omgeving gebracht, nog in het district Noord Tomohon.

Er zijn vier noodverblijven ingericht in drie christelijke scholen in Tomohon. De coordinerend minister van Welzijn, Agung Laksono, liet weten dat de evacuees in goede toestand waren. De Lokon vulkaan barstte maandag uit, waardoor er onder meer een veiligheidszone van 10 nautische mijlen (zo'n 18,5 kilometer) werd ingesteld rond de vulkaan.

Eerder op maandag werd de alarm-status van de vulkaan plotseling verhoogd naar de hoogste status omdat de 1.500 meter hoge Lokon vulkaan bekend staat om zijn plotseling toenemende en afnemende activiteit. De vulkaan begon om 15:50 uit te barsten, waarbij een dikke bruinige aswolk tot zeker 15 kilometer hoog de lucht in werd gestuurd.
PUYEHUE - CHILI
Uitbarsting vulkaan Puyehue (Chili)

KATLA / HEKLA - IJSLAND
Vulkanen IJsland #17 met een Grimmige Grimsvotn

SOPUTAN - INDONESIE
Vulkaan Soputan barst uit.

RIFTVALLEI - AFRIKA
De Riftvallei, Nieuwe oceaan kan Afrika in tween splitsen

TAAL - FILIPIJNEN
Filipijnse 'Taal' vulkaan staat op uitbarsten
Frutseldonderdag 14 juli 2011 @ 12:03
quote:
Vanuatu evacuation alert as volcano rumbles
Vanuatu's Ambae volcano has begun spewing volcanic gases, and residents could be forced to evacuate part of the island.

An expert from the Vanuatu Geohazards Observatory has been sent to monitor the volcano, which has been known to trigger earthquakes.

They have measured an increase in tremor activity in the area and are expecting more explosions.

If the volcano does becomes more active, people living around it will be forced to evacuate.

Volcanologist Sylvain Todman, from the Vanuatu Geohazards Observatory, told Pacific Beat they were watching the situation very closely.

"At the moment we have sporadic explosions but the explosions are getting bigger and bigger every time," he said.
lipjesdonderdag 14 juli 2011 @ 15:51
quote:
Keten van vulkanen ontdekt op oceaanbodem

AMSTERDAM - Britse wetenschappers hebben twaalf reusachtige onderwatervulkanen in kaart gebracht in de Atlantische oceaan.

De keten van vulkanen op de zeebodem is op sommige plaatsen bijna 3 kilometer hoog en ligt in de buurt van de Zuidelijke Sandwicheilanden.
In het gebied zijn kraters aangetroffen met een doorsnee van drie tot vier kilometer. Dat meldt Discovery News op basis van een onderzoek van de British Antarctic Survey.

James Cook
De Britse zeevaarder James Cook schreef in 1775 al over vulkaanuitbarstingen voor de kust van de Sandwicheilanden. “Maar het gebied is nooit onderzocht”, aldus hoofdonderzoeker Phil Leats. “Er blijken gigantische bergen te zijn op de zeebodem.”

De vulkanen zijn in kaart gebracht met sonar scans die zijn gemaakt tijdens een expeditie met een schip.

Het vulkanische landschap is ontstaan onder invloed van tektonische platen die op de zeebodem over elkaar heen schuiven. Daarbij is water onder de aardkorst terechtgekomen, wat weer heeft geleid tot uitbarstingen van gesmolten gesteentes. Sommige van de vulkanen zijn recentelijk nog tot uitbarsting gekomen.

Biologen
De ontdekking van de vulkanen is niet alleen interessant voor geologen. Ook biologen zullen binnenkort waarschijnlijk afreizen naar het gebied, omdat er mogelijk nog onbekende organismen leven.

“We weten dat er vaak erg bijzondere ecosystemen met bijzondere levensvormen ontstaan in dit soort gebieden”, aldus Leats.
Bron:
http://www.nu.nl/wetensch(...)kt-oceaanbodem-.html
svanndonderdag 14 juli 2011 @ 21:23
Wat een verwarring met al die Cook eilanden.
Dit gaat dus over de argentijnse neem ik aan.

The volcanoes are a result of the South American continental plate sliding under the South Sandwich plate to the east, carrying water down into the deep interior of the earth. The water escapes upward, ultimately leading to eruptions of molten rock.

"We have GPS data to show that the South Sandwich Islands are moving east very fast indeed with respect to Africa," Dalziel said. "It's a very active system."

http://news.discovery.com(...).html#mkcpgn=rssnws1
thesiren.nldonderdag 14 juli 2011 @ 22:33
Van de fp:
De Indonesische vulkaan Mount Lokon in de centraal gelegen provincie Sulawesi is donderdag uitgebarsten. Dat hebben medewerkers van de Indonesische hulpdiensten gemeld. Inwoners in de omgeving zijn op de vlucht geslagen.

De eerste uitbarsting had plaats om 22.46 uur plaatselijke tijd en deed zo'n vijfhonderd mensen op de vlucht slaan. Vlak na middernacht barstte de vulkaan een tweede keer uit en om 01.10 uur plaatselijke tijd volgde een derde uitbarsting.

Het leger en de politie helpen met de evacuatie van het gebied, aldus de hulpdiensten. Tweeduizend inwoners werden woensdag al uit voorzorg gevacueerd.

De 1750 meter hoge Mount Lokon is een van de 129 actieve vulkanen in Indonesi.
Sulawesie is natuurlijk een eiland en geen provincie btw. Noorden van sulawesie dus nabij manado. Sommigen kennen pulau bunaken daar wel van het mooie duiken daar.
http://maps.google.nl/map(...)fox-a&gl=nl&t=h&z=12

[ Bericht 5% gewijzigd door thesiren.nl op 14-07-2011 22:49:22 ]
elcastelvrijdag 15 juli 2011 @ 13:45
Die Lokon lijkt als 2 druppels water op de Batok (bij de Bromo), behalve dan het formaat.
elcastelvrijdag 15 juli 2011 @ 18:11
week28_060.jpg

(Gunung Lokon)
Frutselvrijdag 15 juli 2011 @ 21:45
Lokon heeft inmiddels ook een eigen topic
Na Soputan barst nu ook de Lokon uit.
Jumparoundvrijdag 15 juli 2011 @ 21:58
quote:
7s.gif Op vrijdag 15 juli 2011 13:45 schreef elcastel het volgende:
Die Lokon lijkt als 2 druppels water op de Batok (bij de Bromo), behalve dan het formaat.
het is een berg en er komt vuur uit?

;-)
Maronmaandag 18 juli 2011 @ 16:48
Het is niet te hopen dat deze jongens gaan 'puffen'.. :{
http://news.nationalgeogr(...)ca-science-tsunamis/
Frutselmaandag 18 juli 2011 @ 16:54
quote:
0s.gif Op maandag 18 juli 2011 16:48 schreef Maron het volgende:
Het is niet te hopen dat deze jongens gaan 'puffen'.. :{
http://news.nationalgeogr(...)ca-science-tsunamis/
Ah.. dat verklaart ook dit

quote:
Antarctica krijgt tsunami-alarm

Antarctica moet een systeem krijgen dat vroeg genoeg waarschuwt voor een tsunami. Dat hebben de lidstaten van het Antarcticaverdrag beslist op een bijeenkomst in Buenos Aires. Ze willen ook dat het toerisme in de zone meer aan banden worden gelegd.
Dat er ooit een tsunami Antarctica bereikt, is weinig waarschijnlijk. Maar het grootste deel van de basissen op Antarctica bevindt zich aan de kust. Bovendien nemen de wetenschappelijke, logistieke en zelfs toeristische activiteiten er toe.

Argentijns voorstel
Het voorstel komt van Argentini. Op de huidige prognosekaarten voor tsunami's komt Antarctica niet voor, wellicht omdat de menselijke aanwezigheid er te beperkt is, zeggen de Argentijnen. De landen van het Antarcticaverdrag gaan de instituten die deze prognoses maken, nu vragen hun modellen uit te breiden tot de kusten van Antarctica en een rapport op te stellen over de risico's voor de zone.

Antarctica staat niet bekend als seismisch gebied, zeggen experts, maar de laatste jaren werden wel grote bevingen geregistreerd met het hypocentrum (de plaats onder het epicentrum waar de beving ontstaat) in de zeebodem in het gebied. Een van die bewegingen werd in 2007 geregistreerd aan de Zuidelijke Orkney-eilanden, een andere in maart dit jaar aan de Zuidelijke Sandwicheilanden.

Cruiseschepen
Op de bijeenkomst in Buenos Aires kwamen driehonderd vertegenwoordigers samen van de landen die het vijftig jaar oude Antarcticaverdrag hebben ondertekend. Ze willen ook dat er grotere beperkingen komen op het toerisme in de regio.

Sinds de jaren negentig is het aantal toeristen er sterk gestegen, tot 46.000 toeristen per jaar. Dat is tien keer meer dan twintig jaar geleden. Dat komt vooral doordat veel poolschepen na het uiteenvallen van de Sovjet-Unie werden omgebouwd tot cruiseschepen, zegt Jos Mara Acero, ondersecretaris van het Antarcticaverdrag.

Door de financile crisis is het cruiseverkeer in de regio wel met een kwart gedaald en voor het volgende seizoen verwacht men een gelijkaardige terugval, zegt de Internationale Vereniging voor Reisorganisatoren naar Antarctica.

Temperatuur stijgt
Tijdens de bijeenkomst spraken de landen ook hun bezorgdheid uit over de gevolgen van de klimaatwijziging voor Antarctica. Volgens het VN-klimaatpanel is de gemiddelde temperatuur daar de laatste jaren vier keer sneller gestegen dan in de rest van de planeet.

De volgende bijeenkomst vindt in juni volgend jaar plaats in het Australische Hobart
Frutselvrijdag 22 juli 2011 @ 14:04
quote:
Alertlevel raised for Cleveland volcano
Recent satellite images of a remote Alaska volcano along a flight route for major airlines show the mountain may be poised for its first big eruption in 10 years, scientists said on Thursday.

The Alaska Volcano Observatory has issued an eruption advisory for the 5,676 foot-tall Cleveland Volcano, located on the uninhabited island of Chuginadak in the Aleutian chain about 940 miles southwest of Anchorage.

The advisory was based on "thermal anomalies" detected by satellite, the observatory said. Those measurements indicate the volcano could erupt at any moment, spewing ash clouds up to 20,000 feet above sea level with little further warning, the observatory said.

A major eruption could disrupt international air travel because Cleveland Volcano, like others in the Aleutians, lies directly below the commercial airline flight path between North America and Asia, said John Power, scientist-in-charge at the Alaska Volcano Observatory.

The volcano's last major eruption came in 2001, when it blasted ash more than 5 miles into the sky and spilled lava from the summit crater. Cleveland has experienced several smaller eruptions or suspected eruptions since then.

So far, airlines have not changed their flight patterns because of Cleveland's heat emissions, said Steve McNutt, a University of Alaska Fairbanks scientist who works at the observatory.

Scientists are not always certain about what is happening at the remote volcano, observatory officials said. The town of Nikolski, the nearest settlement to Cleveland Volcano, is 45 miles away.

Although Cleveland is among the most active of Alaska's roughly 90 volcanoes, no seismic equipment is set up there because the costs of working in such a remote area are prohibitive, observatory officials said.

Still, Cleveland is the only Alaska volcano blamed for an eruption-caused human death in recorded history. A U.S. soldier who was stationed on Chuginadak Island during World War Two disappeared during an eruption and was presumed killed.

Without sophisticated monitors like those used to keep tabs on volcanoes closer to Anchorage and other populated areas, scientists must rely on a variety of other observations to track Cleveland's eruptions, McNutt said. Those include satellite data, eyewitness reports and video from mariners and pilots in the area.

"Cleveland is a particular bugaboo for us because it is right on the air route" with no seismic equipment, Power said.
Interessant om te gaan volgen. Cleveland kan weer gaan puffen en dan zit het internationale vliegverkeer weer met de brokken :)
Frutseldonderdag 28 juli 2011 @ 11:45
quote:
Earthquake swarm beneith Canary Islands volcano
Recently El Hierro volcano of the Canary Islands has been experiencing a seismic swarm beneath it, which as of yesterday reached to over 700 events. Most of these events have been at Magnitudes of around 2 (+/-0.5) and are clustered beneath El Hierro whilst the depths of these earthquakes have been roughly between 9 and 16 km for the mostpart, with the exception of a few shallower and deeper quakes, the shallowest of which has been 4 km. If we look at these earthquakes in two plots here http://www.volcano-blog.com/hierro.html we can see the clustering of these earthquakes is mainly confined to an oval area at 10 km depth. El Hierro is a broadly basaltic volcano which might have been active in 1793 although this is uncertain.
So the big question is, what’s happening here? It is possible that there is magma on the move at depth, perhaps moving into a magma chamber. Does this mean that there will be an eruption? Maybe, maybe not. The majority of magma intrusions do not reach the surface, and as has been seen elsewhere, in the past, activity can cease at anytime. As of yet (to my knowledge) there have been no other signs of moving magma at the surface such as ground deformation or increased gas emission, although GPS antenna have been set up by officials at the Canary Islands. For now it is too early to tell what (if anything) will happen, so keep watching.
Overzicht van de quake-swarm

Interessant misschien? Het is volgens mij een andere vulkaan dan de 'beroemde' van LaPalma uit dit topic:
Mega tsunami door in zee vallen van eiland La Palma?
Frutseldonderdag 4 augustus 2011 @ 13:45
Vulkaan Cleveland lijkt zich op te maken voor uitbarsting

Cleveland gaat boem doen
Frutselmaandag 8 augustus 2011 @ 11:05
quote:
Mt Karangetang spews fresh lava and ash
A VOLCANO that has been spewing lava and clouds of searing gas high into the air has let out a new, powerful burst, sending panicked villagers streaming down the sides of the mountain.

A man who fell as he was fleeing was injured, said Ludianto, head of the search and rescue team.

The victim suffered only cuts and bruises.

Mount Karangetang on Siau - part of the Sulawesi island chain - started spitting clouds of gas and lava up to 600 metres on Friday, said volcanologist Surono.

Earlier today, hot ash tumbled down its slopes triggering fresh panic.

Nearly 600 people living along Karangetang's slopes have been evacuated, said Tonny Supit, the district chief.

Indonesia lies on the Pacific "Ring of Fire," an arc of volcanos and fault lines encircling the Pacific Basin.

The 1784-metre mountain is one of about 129 active volcanoes in Indonesia. It's last big eruption was in August, killing four people.
#ANONIEMzaterdag 13 augustus 2011 @ 21:54
Waarschuwing voor giftige gassen toeristische vulkaan Java

De Indonesische autoriteiten waarschuwen mensen minstens twee kilometer afstand te houden tot de vulkaan Papandayan op het eiland Java.

De twee gele kraters van de Papandayan, die normaal gesproken populaire toeristenattracties zijn, spuwen gevaarlijke gassen uit als waterstofsulfide en koolstofmonoxide, zegt de Indonesische vulkanoloog Surono.

De Indonesische autoriteiten hebben het op een na hoogste waarschuwingsniveau ingesteld voor de vulkaan, die in 2002 voor het laatst uitbarstte.

vK
Frutselzondag 14 augustus 2011 @ 20:12
quote:
Soputan status increased after ash eruption
UPDATE 14/08-17:03 UTC : Officials told the press that the alert status of Mt Soputan was also increased 1 level to III. This brings the number of volcanoes into the second highest alert level to 5.
NO volcano has the highest alert level so far.

RENEWED ACTIVITY UPDATE 14/08-16:07 UTC : The Soputan volcano once again started spewing ash clouds in the air as he did on July 3. The farmers in the surrounding villages are very concerned for their crops.
It can be called curious that the Indonesian Authorities have only an Alert level II active for this volcano (on a scale of 1 to 4), although a local Sulawesi spokesman told the press that the alert status will probably be raised today to level III. The 1784 meter high volcano spews ash until a level of 12,000 feet (3,700 meter). The density stays moderately dangerous for air traffic for approx. 55 nm (nautical miles) in a westerly direction (source VAAC).
The Indonesian NDMA reports that the first of 2 powerful eruptions started at 09:27 local time (the ash cloud climbed 1,200 above the summit crater). 7 hours later a second burst of ash followed.
Authorities have ordered a 4 km No-Go radius as the NDMA fears for avalanches and pyroclastic flows. So far there are NO reports of injuries or serious damage.

UPDATE 04/07-10:19 UTC : The people working for the Mount Soputan Geological Survey have confirmed that the volcano showed no further eruption pattern. As the mountain was covered by thick clouds, scientist have not seen any alteration of color compared to normal clouds. Therefore they conclude that the activity has stopped.
Additionally we can report that the (explosive) activity of the volcano (ash clouds) resulted in 16 flights to be postponed or canceled at Manado International Airport yesterday.
Frutselzondag 14 augustus 2011 @ 20:14
quote:
Aantal trillingen Papandayan boven normaalGARUT - Het aantal trillingen dat gemeten wordt door gevoelige instrumenten rond de Papandayan vulkaan in het district Garut in de provincie West Java laat een stijging zien. Omdat er gisteren in enkele uren tijd zes maal een trilling werd waargenomen, is besloten de alarm-status van de vulkaan te verhogen naar het derde niveau op een schaal van vier.

"Het aantal trillingen onder de Papandayan vulkaan ligt hoger dan gemiddeld normaal is," aldus Momon, dienstdoende observant op de observatiepost in Cisurupan. Het aantal trillingen wordt op dit moment twee maal daags afgelezen. In Augustus zijn in totaal al 48 trillingen geregistreerd, waar dit over de gehele maand juli nog 50 was.

Sinds de laatste uitbarsting van de Papandayan vulkaan op 11 november 2002 is het voor het eerst dat de alarm-status van de vulkaan op het derde niveau is komen te staan. Volgens Momon is er nog geen significante stijging van het water in het kratermeer gemeten. "De overige metingen laten over het algemeen nog een normaal beeld zien," legde Momon uit.
Frutselwoensdag 24 augustus 2011 @ 12:13
El Hierro eigen topic
Aardbevingszwerm Gran Canaria houdt aan, wat gebeurt daar?

[ Bericht 96% gewijzigd door Frutsel op 24-08-2011 12:25:12 ]
Frutselmaandag 29 augustus 2011 @ 12:52
quote:
Marapi stoot rookwolk uit
BUKITTINGGI - De Marapi vulkaan in West Sumatra - niet te verwarren met de Merapi vulkaan in Midden Java - heeft gisteren opnieuw een witte rookwolk uitgestoten. Dit gebeurde tussen 9 en 10 uur in de morgen lokale tijd. De alarmstatus van de vulkaan stond al op niveau twee op een schaal van vier en ook is er een klimverbod ingesteld voor de top van de vulkaan.

Een uur voordat de witte rookwolk werd uitgestoten, produceerde de 2.891 meter hoge vulkaan ook al een kleine gitzwarte rookwolk gedurende tien minuten. Door de sterke wind werden beide wolken snel uiteengeblazen. Later op de dag ging de top van de vulkaan schuil achter een dichte mist, waardoor niet meer kon waargenomen of er nog meer rookwolken werden uitgespuwt.

Het Agentschap Beheersing Rampen BGPVMB handhaaft de alarmstatus voor de vulkaan vooralsnog. Er zijn namelijk geen verdere aanwijzigingen dat de vulkaan actiever aan het worden is. Een gebied van drie kilometer rond de top van de vulkaan is tot verboden gebied verklaard. Meetinstrumenten op diverse plekken op de hellingen van de vulkaan doen vooralsnog hun werk prima.

In de directe omgeving van de Marapi vulkaan liggen twee andere actieve vulkanen, de Singgalang en Tandikek. Op 3 augustus stootte de vulkaan een aswolk uit tot een hoogte van 1.000 meter. De laatste uitbarsting van de vulkaan was in 2005. Steden in de buurt van de vulkaan zijn onder meer Agam, Tanahdatar, Pariaman, Padangpariaman en Padangpanjang.
Marapi dus, niet Merapi :P
Frutselmaandag 29 augustus 2011 @ 12:53
quote:
Verhoogde status voor vulkaan op Flores (Indonesie)
FLORES - Het Agentschap voor Meteorologie, Klimatologie en Geofysica (BMKG) heeft bekend gemaakt dat het de starmstatus van de Anak Ranakah vulkaan in het district Manggarai op het eiland Flores in zuidoost Indonesi heeft verhoogd naar twee, op een schaal van vier. De 2.247 meter hoge vulkaan stoot vrijwel doorlopend een kleine witte rookpluim uit, maar er is nu ook een verhoogde activiteit waargenomen in de vulkaan zelf.

De vulkaan, die eigenlijk meer een lava-koepel is, is de meest recent gevormde lava-koepel in de Pocok Leok caldera van de Ranakah vulkaan. Deze lava-koepel werd eind december 1987 gevormd. Op 11 januari 1988 barstte de vulkaan voor het laatst met kracht uit vanuit deze nieuw gevormde lava-koepel. Toen bereikte de aswolk een hoogte van acht kilometer. Ook veroorzaakte de vulkaan hete pyroclastische wolken.

Er is vrij weinig bekend over de vulkaan omdat de eerst bekende uitbarsting die van 1988 is. Sindsdien is de vulkaan ook niet meer uitgebarsten. Wel is te meten dat in de vulkaan zich meer en meer trillingen voordoen. Deze trillingen zijn echter zo klein dat ze niet door mensen gevoeld kunnen worden. Op basis van deze gegevens is wel besloten om de alarmstatus voor de vulkaan te verhogen naar twee, zeker omdat de lava-koepel van de vulkaan erg kwetsbaar is.

De vulkaan wordt actief en intensief in de gaten gehouden. De bevolking in het gebied wordt opgeroepen om altijd alert te zijn op de activiteit van de vulkaan. Ook wordt samen met lokale en regionale rampenteams bekeken of eventuele extra voorzorgsmaatregelen nodig zijn. Bezoekers mogen het gebied in de directe omgeving van de Anak Ranakah niet beklimmen bovendien.
Frutseldinsdag 30 augustus 2011 @ 15:49
Boom Boom... Tambora...

quote:
Eruptions reader Martin pointed out an new report from the volcanological survey in Indonesia, the PVBMG, that raises the alert level at one of Indonesia's most famous volcanoes, Tambora. Now, many of you volcano enthusiastics would remember Tambora for 1815, when it produces one of the largest eruptions in the past few thousand years. This eruption through enough material and aerosols into the atmosphere to cause significant global cooling, producing the "Year without a Summer" documented across the globe. What most people don't know is that after the 1815 eruption, Tambora has erupted at least 3 known times, all in the scale of VEI 0-2 (rather than the VEI 7 of 1815).

Why do I mention this? Well, with any news of increased seismicity and steam plumes at a volcano like Tambora, you can be sure the fear/panic-mongers will come out in full force. The PVBMG reports says that since April 2011, the volcano has seen intermittent swarms of earthquakes and now at the end of August, there seems to be an increase in these shallow, volcanic earthquakes along with the presence of tremor. Combine that in observations of steam plumes rising tens of meters over the edge of the caldera rim, then you might have the signs of impending activity - thus the elevation of the alert status from Level I to II. Now, what kind of activity might we expect? Most likely we would expect something small, akin to the VEI 0-2 eruptions in 1819, 1880 and 1967, which were mainly lava flows and domes confined to the caldera floor, and most definitely not another VEI 7 event like the 1815 eruption.
De Tambora :X (Was daar laatst niet een quake in de krater van 5.0 ofzo?)
Die zouden we niet graag zien ploffen denk ik :{ Maar even volgen denk ik.. ondanks dat de verwachtingen niet groots zijn, maar mogelijk wel potentieel voor doomdenkers :P :)

Voor de nietwetenden: Tambora 1815 - the year without summer

[ Bericht 0% gewijzigd door Frutsel op 30-08-2011 15:54:32 ]
Frutselwoensdag 31 augustus 2011 @ 16:17
Popocatepetl_20110831_1.jpg
Popocatepetl_20110831_3.jpg

quote:
MEXICO CITY — The Popocatepetl (po-po-ka-TEH-peh-tel) volcano south of Mexico City is shooting blasts of ash from its crater.

Mexico’s national disaster prevention agency says the volcano has spewed ash more than a half mile (a kilometer) into the sky four times Tuesday. It says there is a possibility ash could fall onto Mexico City overnight.

The agency is urging people to stay at least 7 miles (12 kilometers) from the crater.

The 17,886-foot (5,450-meter) volcano is about 40 miles (65 kilometers) southeast of the capital
Frutselmaandag 12 september 2011 @ 12:28
quote:
Tambora alert status raised again
Dompu, West Nusa Tenggara. Provincial authorities raised the alert level of Mount Tambora to the second-highest available as observers noted an increase of volcanic activity in the volatile mountain.

“On August 30, we recorded seven volcanic earthquakes and since Sept. 8 the frequency of the quakes rose substantially, to between 12 and 16 per day,” Husnuddin, head of the West Nusa Tenggara Disaster Mitigation Agency (BPBD), told the Jakarta Globe on Sunday.

The BPBD chief said a team of observers had been immediately deployed to Mount Tambora.

The volcano, which was the site of the world’s deadliest eruption on record, showed no apparent visual signs of any upcoming eruption, but data collected on mechanical instruments gave cause for concern.

“We still hope Mount Tambora’s alert level will not increase further. We hope we can lower the status of the volcano. Let us all pray everything will return to normal,” Husnuddin said.

Abdul Haris from the Mount Tambora observatory station said the heightened alert status meant an eight-kilometer exclusion zone was being imposed.

“We fear there will be toxic gas as a direct result of the increased activity,” he said.

Husnuddin said the BPBD swiftly met with leaders of the three districts surrounding the volcano — Dompu, Bima and Sumbawa.

The agency also held talks with the leadership of Pekat and Tambora, two Dompu subdistricts near Tambora’s crater, to discuss possible evacuation plans if the alert status reaches the highest level. The agency also had identified locations for possible shelters to house people living around the volcano.

There are four villages in the two subdistricts that are about eight kilometers from the crater.

The BPBD requested several organizations be on stand-by, including the National Disaster Mitigation Agency (BNPB), the National Search and Rescue Agency (Basarnas) and the country’s Armed Forces, which have already deployed officials to several response stations in the two subdistricts.

Two main evacuation routes for people in the four villages have also been identified.
Damn, gaat die dan toch rare dingen doen?
Er zou ook nog een andere vulkaan op Flores rommelen, de Lewotobi
SpeedyGJwoensdag 21 september 2011 @ 19:00
Gaat lekker in de vulkanen wereld.
2012 komt nu wel heel dichtbij hehe :D

Neh we moeten het maar lekker in de gaten houden, vulkanen zijn leuk om te zien maar de bijwerkingen daarvan zijn een heel stuk minder ;)
zenkellywoensdag 28 september 2011 @ 18:34
http://www.ct.ingv.it/index.php?option=com_wrapper&view=wrapper&Itemid=201
Tremoren Etna. Explanation please?? :P
DemonRagewoensdag 28 september 2011 @ 20:23
quote:
Ach, Etna is altijd bezig. Niet echt een spannende vulkaan.
ScudRaketwoensdag 28 september 2011 @ 21:35
Op El Hierro staat er ook 1 op ploffen.
Honingbijtjewoensdag 28 september 2011 @ 21:48
quote:
0s.gif Op woensdag 28 september 2011 21:35 schreef ScudRaket het volgende:
Op El Hierro staat er ook 1 op ploffen.
Zie Vulkaanuitbarsting op Canarische Eilanden op komst?
:)
Frutseldonderdag 29 september 2011 @ 09:28
Etna heeft ook een eigen topic :Y
Uitbarsting Etna

Maar het is jammer dat zaken als Ali B en Patricia P belangrijker zijn op andere delen van Fok dan dat nieuwsberichten uit dit deel eens wat meer aandacht krijgen. Maar ja, je went er aan.

[ Bericht 11% gewijzigd door Frutsel op 29-09-2011 10:05:37 ]
Frutseldonderdag 6 oktober 2011 @ 13:24
quote:
Vulkaanuitbarsting Tenerife helpt aardverschuivingen te begrijpen

AMSTERDAM - De ontdekking van een grote vulkaanuitbarsting op Tenerife van 733.000 jaar geleden werpt nieuw licht op aardverschuivingen. Zo is men in de toekomst mogelijk beter voorbereid op de gevolgen van dit soort grote catastrofes.

Vulkanologen van de Universiteit van Leicester ontdekten op het Canarische eiland Tenerife een aardverschuiving ten gevolge van een grote vulkaanuitbarsting waarbij een deel van de zijkant van de vulkaan de zee in verdween.

Ze publiceerden hun bevindingen in de oktober-editie van het tijdschrift Geology.

Bijzonder

Het is bijzonder dat niet vrijwel de hele aardverschuiving door de uitbarsting de zee in verdwenen is. "Het is een van de best bewaarde en toegankelijke voorbeelden van zo’n ontzagwekkend fenomeen, omdat het puin van zulke aardverschuivingen zich meestal over de oceaanbodem verspreid en daardoor ontoegankelijk voor verdere studie", verklaart Dr. Branney, een van de onderzoekers.

Het achtergebleven puin en gruis op Tenerife bevat onder andere blokken van snel afgekoeld stollingsgesteente. Radioactieve mineralen in de gestolde lava maakten het voor de onderzoekers makkelijk om zeer precies de datum van de uitbarsting te bepalen.

Klimaatverandering

Klimaatverandering wordt vaak aangewezen als reden voor aardverschuivingen op eilanden in de oceaan. Dat was nu niet het geval. Een groeiende koepel van hete lava duwde van binnenuit de zijkant van de vulkaan naar buiten toe.

Zulke gebeurtenissen zijn niet ongewoon, maar komen zeer onregelmatig voor. Ze begrijpen is daarom van belang omdat de effecten duizenden kilometers verderop grote problemen kunnen veroorzaken.
Frutselmaandag 10 oktober 2011 @ 11:56
quote:
Zes Indonesische vulkanen op verscherpt toezicht
JAKARTA - Hoewel inmiddels zes vulkanen onder scherp toezicht staan vanwege hun verhoogde activiteit, heeft het Nationaal Agentschap Rampen BNPB laten weten dat op dit moment er geen noodzaak is tot het evacueren van inwoners.

Een woordvoerder van BNPN, Sutopo Purwo Nugroho zei zondag dat er zes vulkanen op een verhoogde alarm-status staan op dit moment; de Tambora vulkaan in West Nusa Tenggara, de Anak Ranaka in Oost Nusa Tenggara, de Papandayan in West Java, de Karangetang en Lokon in Noord Sulawesi en de Anak Krakatau in de Sunda Straat.

"Deze vulkanen staan op dit moment op alarm-status drie op een schaal van vier. Dit betekent dat ze vulkanisch zo actief zijn dat dit zou kunnen leiden tot een uitbarsting of een ramp," aldus Nugroho via SMS aan de Jakarta Post.

Nugroho voegde toe dat de Anak Krakatau vulkaan op dit moment zo'n 5.000 trillingen per dag liet registreren. Er is een twee kilometer grote zone rond de top van de vulkaan als onveilig bestempeld. De vulkanen worden de klok rond geobserveerd door instrumenten en personen.
Frutselwoensdag 19 oktober 2011 @ 15:10
quote:
Swarm of earthquakes around Mt.Rainier
SEATTLE -- It may not amount to much, like so many times before, but seismologists are paying close attention to a recent swarm of earthquakes on Mount Rainier.

Data from the Pacific Northwest Seismic Network show at least seven earthquakes in the last two weeks around the mountain.

One of the strongest was last Friday, when a 3.4 magnitude quake struck in the afternoon near Ashford. Earlier that day, a 2.9 magnitude quake shook beneath Mount Rainier.

Thousands of tiny quakes preceed the erruption of Mt. St. Helens seven years ago as magma was being pushed upward from deep below. As they were then, scientists say these quakes are also shallow, but not necessarily a warning sign of anything immediate.

"It helps seeing these types of events over, in my case, decades," said University of Washington seismologist Steve Malone.

Seismologists are also watching Eastern Washington, where there have been at least four earthquakes in the last few days around a small area on the Columbia River just north of Richland.

Coincidentally, a 3.4 magnitude quake struck that area the same day as the Ashford quake near Mount Rainier. However, scientists say the two swarms are not connected.

"We just have to pay attention," said Malone. "Just keep watching it."
mouzzerwoensdag 19 oktober 2011 @ 15:29
Valt allemaal mee :)

Mt. Rainier Earthquakes: When the “News” isn’t News
http://www.wired.com/wire(...)-the-news-isnt-news/

Mocht hij nog niet genoemd zijn dit is een erg interessante blog:
http://www.wired.com/wiredscience/eruptions
Frutselwoensdag 19 oktober 2011 @ 15:49
Had het net ook gelezen inderdaad.
Maar goed, daar is dit 'centrale' topic ook voor... alles wat gemeld wordt over vulkanen, kan hier in...

Als het echt slim wordt, krijgt Rainier wel een eigen topic :Y
Frutselvrijdag 21 oktober 2011 @ 11:34
Mauna-Kea.jpg

quote:
Earthquakeswarm at Mauna Kea Hawaii
After yesterday’s post on the “swarm” at Rainier (which apparently rubbed a lot of people the wrong way), I was hesitant to post on the news coming from Mauna Kea right away, but if you’re looking for a real swarm of earthquakes at a volcano, look no further (see below). Since early yesterday (Hawaii time), the volcano has experienced at least 38 earthquakes, some as large at M4.5, all centered NW of the main summit of Mauna Kea, all at depths between 14-19 km (see below), all below the crust under the Big Island. This is what a suspicious swarm looks like, where we have a strong focus of seismicity at depth under an active volcano – the question now is how persistent will this swarm be. More likely than not, these earthquakes will lead to nothing – and HVO says these earthquakes are “most likely caused by structural adjustments within the Earth’s crust due to the heavy load of Mauna Kea”. Remember, Mauna Kea is a huge point weight on the crust and upper mantle below Hawai’i, towering over 4,200 m / 13,800 feet above sea level, thus about 9,000-10,000 m above the seafloor, so a lot of stress can accumulate from the mass of the volcano. This means earthquakes are likely common as that stress builds.

Remember, Kilauea and Mauna Loa are not the only active volcanoes on the Big Island of Hawai’i. Haulalai last erupted as recently as 1801, while Mauna Kea, the 2nd oldest shield volcano on the island last erupted only ~4,470 years ago. For argument’s sake (not that this swarm looks to be leading to any eruption), Mauna Kea is located on the back side of the active plume head for Hawai’i – so we think the “hotspot” is located under Kilauea. However, even after the plate has passed over the hotspot, volcanism can continue for some time – the “post-shield” phase of the volcano. In the very small likelihood that these earthquakes under Mauna Kea are leading to a new eruption, it is likely to be a small eruption of alkalic basalt (as opposed to the tholeiitic basalt at Kilauea – these terms just refer to the extent of melting that occurred to form the magma). Interestingly, most of the recent activity at Mauna Kea has been on the NE or S flanks, not the NW. Mauna Kea has felt swarms before, so this by no means something is in the works. However, considering the astronomical infrasructure at the summit of Mauna Kea, it needs to be watched closely. Even this increased seismicity can’t be good for highly sophisticated telescopes such as those on Mauna Kea.
Frutselvrijdag 21 oktober 2011 @ 11:46
uturuncu-full-111019-02.jpg
quote:
Rapidly Inflating Volcano Creates Growing Mystery
Should anyone ever decide to make a show called "CSI: Geology," a group of scientists studying a mysterious and rapidly inflating South American volcano have got the perfect storyline.

Researchers from several universities are essentially working as geological detectives, using a suite of tools to piece together the restive peak's past in order to understand what it is doing now, and better diagnose what may lie ahead.

It's a mystery they've yet to solve.

Uturuncu is a nearly 20,000-foot-high (6,000 meters) volcano in southwest Bolivia. Scientists recently discovered the volcano is inflating with astonishing speed.

"I call this 'volcano forensics,' because we're using so many different techniques to understand this phenomenon," said Oregon State University professor Shan de Silva, a volcanologist on the research team.

Researchers realized about five years ago that the area below and around Uturuncu is steadily rising — blowing up like a giant balloon under a wide disc of land some 43 miles (70 kilometers) across. Satellite data revealed the region was inflating by 1 to 2 centimeters (less than an inch) per year and had been doing so for at least 20 years, when satellite observations began.

"It's one of the fastest uplifting volcanic areas on Earth," de Silva told OurAmazingPlanet."What we're trying to do is understand why there is this rapid inflation, and from there we'll try to understand what it's going to lead to."

The peak is perched like a party hat at the center of the inflating area. "It's very circular. It's like a big bull's-eye," said Jonathan Perkins, a graduate student at the University of California, Santa Cruz, who recently presented work on the mountain at this year's Geological Society of America meeting in Minneapolis.

Scientists figured out from the inflation rate that the pocket of magma beneath the volcano was growing by about 27 cubic feet (1 cubic meter) per second.

"That's about 10 times faster than the standard rate of magma chamber growth you see for large volcanic systems," Perkins told OurAmazingPlanet.

However, no need to flee just yet, the scientists said.

"It's not a volcano that we think is going to erupt at any moment, but it certainly is interesting, because the area was thought to be essentially dead," de Silva said.

Uber-Uturuncu?

Uturuncu is surrounded by one of the most dense concentrations of supervolcanoes on the planet, all of which fell silent some 1 million years ago.

Supervolcanoes get their name because they erupt with such power that they typically spew out 1,000 times more material, in sheer volume, than a volcano like Mount St. Helens. Modern human civilization has never witnessed such an event. The planet's most recent supervolcanic eruption happened about 74,000 years ago in Indonesia.

"These eruptions are thought to have not only a local and regional impact, but potentially a global impact," de Silva said.

Uturuncu itself is in the same class as Mount St. Helens in Washington state, but its aggressive rise could indicate that a new supervolcano is on the way. Or not.

De Silva said it appears that local volcanoes hoard magma for about 300,000 years before they blow — and Uturuncu last erupted about 300,000 years ago.

"So that's why it's important to know how long this has been going on," he said.

To find an answer, scientists needed data that stretch back thousands of years — but they had only 20 years of satellite data.

Volcano rap sheet

"So that's where we come in as geomorphologists — to look for clues in the landscape to learn about the long-term topographic evolution of the volcano," Perkins said.

Perkins and colleagues used ancient lakes, now largely dry, along the volcano's flanks to hunt for signs of rising action.

"Lakes are great, because waves from lakes will carve shorelines into bedrock, which make lines," Perkins said.

If the angle of those lines shifted over thousands of years — if the summit of the mountain rose, it would gradually lift one side of the lake — it would indicate the peak had been rising for quite some time, or at least provide a better idea of when the movement began.

The local conditions, largely untouched by erosion or the reach of lush plant and animal life, lend themselves to geological detective work, Perkins noted.

"It's a really sparse, otherworldly landscape," Perkins said. "Everything is so well preserved. There's no biology to get in the way of your observations."

Perkins said that surveys conducted on the lakes last autumn didn't indicate long-term inflation. However, tilting lakes are only one indicator of volcano growth, he said.

De Silva said the geological detective team is working to combine data from a number of sources — seismic data, GPS data, even minute variations in gravity — to pin down when and why the mountain awoke from its 300,000-year-long slumber, and better predict its next big move.
stan12zaterdag 22 oktober 2011 @ 18:04
On the brink: Tremors increase at Anak Krakatau to 5,000 a day
Posted on October 22, 2011 by The Extinction Protocol
October 22, 2011 – SUMATRA, Indonesia –Several earthquakes have struck near south Sumatra of the 5.0 and 5.1 magnitude range today- making a tense situation on the volcanically-dotted archipelago potentially even more volatile. The Anak Krakatau volcano is showing signs of increased seismic activity. Authorities fear the volcano is building towards an eruption that could dwarf the one which occurred in 2007. Indonesia’s Volcanology and Geological Disasters Mitigation Center reported the numbers of seismic tremors now registering from the volcano have exceeded 5,000 a day. There are also reports of a gaseous mist which has seeped from the volcano and have enshrouded it in a yellowish haze- something that has never been observed at the volcano before. Anak Krakatau was placed on orange (level 3) status alert on September 30, 2011. –The Extinction Protocol

http://theextinctionproto(...)katau-to-5000-a-day/
Frutseldonderdag 27 oktober 2011 @ 09:31
quote:
0s.gif Op zaterdag 22 oktober 2011 18:04 schreef stan12 het volgende:

On the brink: Tremors increase at Anak Krakatau to 5,000 a day
Posted on October 22, 2011 by The Extinction Protocol
October 22, 2011 – SUMATRA, Indonesia –Several earthquakes have struck near south Sumatra of the 5.0 and 5.1 magnitude range today- making a tense situation on the volcanically-dotted archipelago potentially even more volatile. The Anak Krakatau volcano is showing signs of increased seismic activity. Authorities fear the volcano is building towards an eruption that could dwarf the one which occurred in 2007. Indonesia’s Volcanology and Geological Disasters Mitigation Center reported the numbers of seismic tremors now registering from the volcano have exceeded 5,000 a day. There are also reports of a gaseous mist which has seeped from the volcano and have enshrouded it in a yellowish haze- something that has never been observed at the volcano before. Anak Krakatau was placed on orange (level 3) status alert on September 30, 2011. –The Extinction Protocol

http://theextinctionproto(...)katau-to-5000-a-day/
Thx! Krakatau heeft trouwens ook een eigen topic ;)
Frutseldonderdag 27 oktober 2011 @ 09:33
Hudson Volcano active after 20 years

hudson1-750x10602.jpg

The National Service of Geology and Mining (SERNAGEOMIN) – Volcano Observatory of the Southern Andes (OVDAS), announced that from the early hours of last night there has been increased seismic activity related to the Hudson volcano. At 19:08 local time, an earthquake Volcano-tectonic (VT), magnitude (ML) equal to 4.6 located 7 km to the NW edge of the caldera, at a depth of 19 km, which was followed by the occurrence of a seismic swarm starting at 21:49 hrs, includes more than 100 seismic events recorded until the time of this report, whose depths range from 15 to 25 km. It notes that 15 events recorded magnitudes (ML) greater than 3.0 and three (3) of these magnitudes (ML) greater than 4.0, all characterized by having more to do with broken rock (VT) at 00: local 20 hours today, Wednesday, October 26, an earthquake associated with fluid movement and characterized by very low frequency (long period – VLP), located in the same area at a depth of 15 km, with a magnitude (ML) equal to 4.3. The seismic swarm continues at the time of issuance of this report with less intensity. The preceding activity indicates that the volcanic system has experienced changes in their dynamics, possibly associated magmatic activity at depth, which in the future the system can lead to imbalance.

150px-Map_chile_volcanoes.gif Pre-eruption: The Chilean authorities decided to raise the alert level to red and preventive evacuations in an area of ​​40 kilometers around Mount Hudson. The column emission from the eruption reached 1 km in height. The information was confirmed this afternoon from Vice President Rodrigo Hinzpeter Onemi, from where he said he “cannot rule out an eruption,” so it was decided to evacuate people living in that radius.” An over-flight of the area showed a column of smoke and gases out of the cone of the Hudson. In addition, there were some signs of an avalanche in the vicinity. –Diarioandino
Hudson’s explosive history: “Large eruptions around 4750 BCE and 1890 BCE are believed to have been of Volcanic Explosivity Index VEI 6; these are probably responsible for the large caldera. The 4750 BCE eruption may have wiped out many if not all groups of early man living in central Patagonia at that time, based on evidence from the Los Toldos archaeological site. Before 1970, little was known about the mountain. Minor eruptive activity began in 1970 and melted parts of the glacier, raising river water levels and leading to the identification of the caldera. In August-September 1971, a moderate eruption (VEI 3) located in the northwest area of the caldera sent ash into the air and caused lahars from the melting of a large portion of the glacier. The lahars killed five people; many more were evacuated. It’s last eruption in August to October 1991 was a large plinian eruption with a VEI of 5, that ejected 4.3 km3 bulk volume (2.7 cubic km of dense rock equivalent material). Parts of the glacier melted and ran down the mountain as mud flows. Due to the remoteness of the area, no humans were killed but hundreds of people were evacuated from the vicinity. Ash fell on Chile and Argentina as well as in the South Atlantic Ocean and on the Falkland Islands. In addition to the ash, a large amount of sulfur dioxide gas and aerosols were ejected in the eruption. These contributed to those already in the atmosphere from the even larger Mount Pinatubo eruption earlier in the year and helped cause a worldwide cooling effect over the following years. Ozone was also depleted, with the Antarctic ozone hole growing to its largest levels ever recorded in 1992 and 1993.
Frutselmaandag 7 november 2011 @ 19:20
quote:
Nyamuragira volcano erupts

November 7, 2011 – DRC, AFRICA – The Nyamulagira volcano located 22 km from the city of Goma, capital of the province of North Kivu, in eastern DRC, has been erupting since Sunday around 8:30 p.m., a said Monday the Goma Volcano Observatory. According to volcanologists, the people of Goma, are not directly threatened by the eruption of this volcano because the lava flows are directed towards the Virunga National Park (Virunga National Park). . However, had he added, people should be held in compliance with the rules of hygiene to protect against such volcanic ash released by the volcano. During the last eruption of this volcano in January 2010, the lava had burned over 11 hectares of the forest of the Virunga Park, which extends over 790,000 ha. To the World Heritage Site by UNESCO since 1979, the Virunga National Park is home to various species of mammals (hippos, gorillas …), reptiles and birds. The eruptions of Nyamulagira May 2004 and November 2006 had made the most active volcano in Africa. Nyamulagira and Nyiragongo volcanoes are two of eight active volcanoes that make up the Virunga chain, located in the Virunga National Park in eastern DRC. In January 2002, a lava flow of Nyiragongo volcano had destroyed 80% of the border city of Rwanda. Le Nyamulagira volcano erupts at intervals of about 2 years in contrast to Nyiragongo is unpredictable
Frutseldinsdag 8 november 2011 @ 15:58
virunga-volcano-nyamulagira-eruption-lava_43207_600x450.jpg

quote:
The erupting Nyamulagira (also known as Nyamuragira) volcano reddens the sky on Sunday in the Democratic Republic of the Congo. (See an interactive cutaway of the Nyamulagira volcanic region.)

Nyamulagira, which generally erupts every two years, rumbled to life at 8:06 p.m., spewing lava, smoke, and ash throughout Virunga National Park. The volcano sits within the park, about 25 miles (40 kilometers) north of the city of Goma (map).

The park's communications officer, LuAnne Cadd, first got a phone call about the event from rangers, who'd heard noises like gunshots, she said.

Cadd immediately went outside to take pictures of the nighttime spectacle, which was occurring an estimated 6 to 12 miles (10 to 20 kilometers) west of park headquarters in Rumanbago, she said. (See a park map.)

"What's quite astonishing is how bright it is, how it lights up the sky with a red glow, and the sound. We can hear the dull roar of it, especially at night in our tents," she told National Geographic News via email.

"I'm actually looking at it while I'm talking to you—it's so amazing, just a monstrous fountain" of lava, Cadd said.

"It's mesmerizing and hard to pull your eyes away from it."

Experts say the volcano could continue erupting for weeks and even months, Cadd added.
elcasteldinsdag 8 november 2011 @ 23:19
Plaatjes :
http://totallycoolpix.com/2011/11/in-the-picture-diego-spatafore/
Frutselmaandag 14 november 2011 @ 11:45
quote:
Seismic activity beneath Santorini volcano continues to be slightly above normal levels.
Beginning since July this year, an there is elevated activity in a SW-NE trending zone passing through Nea Kameni and the submarine Kolumbos volcano NE of Santorini.
The alignment (also known as the Kameni and Kolumbus lines) is a ca. 2 km wide zone parallel to a tectonic horst and graben structure of the crystalline basement of the area. Most of the known volcanic vents of Santorini during the past 2 million years were located on this alignment, more precisely either on its southern boundary (Kameni line) or on its northern boundary (Kolumbus line).
Lacking other data sources, the information visible on the location and number of earthquakes is too weak, other than to vaguely speculate that the current earthquake activity around Santorini could be a precursor to new activity from this volcano. Santorini's last eruption was in 1950.
Frutselmaandag 14 november 2011 @ 18:50
Frutselwoensdag 16 november 2011 @ 14:26
Congolese vulkaan bezorgt toeristen foto van hun leven

eigen topic
#ANONIEMdonderdag 17 november 2011 @ 14:28
nyamuragira_ali_2011316.jpg

quote:
n November 6, 2011, after more than a year of relative peace, the Nyamuragira volcano in the Democratic Republic of Congo surged to life. Lava has erupted spectacularly from a fissure low on one of the volcano's flanks and spilled northward, away from populated areas. Nyamuragira is a shield volcano and one of Africa's most active.
For more than a week, cloud cover mostly obscured the view from space until the Advanced Land Imager on NASA’s EO-1 satellite captured images on November 12, 2011. This false-color view combines shortwave infrared, near infrared, and green light. Fresh lava is bright red, an indication that it was active at the time the satellite flew overhead. Billowing, blue-tinged steam clouds rise above the superheated fissure and lava-bathed landscape. In the full-size, wider view (available by link just below the image), the lava lake at nearby Nyiragongo volcano (to the south) glows red through the cloud cover.
A blogger and ranger from Virgunga National Park wrote:
...We hiked a bit further until we came to a section where the vegetation ended and the ground was covered in small pebbles of weightless lava gravel. The thundering roar of the volcano was incredible and the heat of the 100-meter column of lava clearly tangible...The eruption site is truly amazing. It’s located on a flat area, but the sides have been building up around the crack over the last week...The lava has a low silica content resulting in lava with a low viscosity (very fluid), which in turn results in the amazing lava fountain.
Ground-based video of the eruption is available here from the Virunga National Park. Wider satellite views of the landscape around the eruption on November 8 and November 16 are available online through the LANCE/EOSDIS MODIS Rapid Response Team.
http://earthobservatory.nasa.gov/IOTD/view.php?id=76405
Frutselzondag 20 november 2011 @ 20:43
popo.jpg

quote:
Popocatepetl volcano triggers plume 7km high
Amecameca • The Popocatepetl volcano registered an explosion that caused a plume height of 7 kilometers with emission of ash, gas and steam from the crater, and land movement could be felt in Amecameca and even the neighboring municipality of Tlalmanalco .

Civil Protection Director Amecameca, Javier Alonso Meneses said that due to the explosion at 12:02 on Sunday, was ejected incandescent material fell to 8 miles away in parts of Canada Nexpayantla, Amecameca, which originated a fire, which is being stifled by rescue workers.

Relief Corps of the town maintain communication with officials of the eight delegations of the municipality to inform them about the event and avoid panic situations.

Alonso Meneses said that according to the National Center for Disaster Prevention (Cenapred), another more severe scenario, there could be similar events, but said that is informing the public about precautionary measures to be undertaken.

People living in nearby areas felt a vibration after the crash.

Early reports indicate that the explosion was caused by the magnitude of the cone was covered. The fumalora is directed towards the area of ​​Puebla.
Frutseldinsdag 22 november 2011 @ 18:19
quote:
Fuego spews ash
The Guatemalan geophysical survey SERNAGEOMIN reports increasing explosive activity from Fuego volcano, one of the country's most active volcanoes. Fuego was observed producing ash clouds reaching 1500-2000 m above the summit crater (at ca. 3600 m altitude) which drifted SW and reached up to 20 km distance where they produced some ash fall, reported in the communities of Panimach, Morelia, Sangre de Cristo, and Santa Sofa.
The explosions were accompanied by moderate to strong booming noises and shock waves that could be felt in up to 15 km distance. Near-constant rock avalanches are observed on the upper slopes beneath the summit crater, some of which reach the vegetated areas.
Frutselvrijdag 25 november 2011 @ 20:45

quote:
Exhalacion del volcan Popocatepetl el 20/11/2011
Resistorvrijdag 25 november 2011 @ 21:50
Dan sta je toch even raar te kijken, als 'opeens' (als leek zijnde) een vulkaan voor je ogen uitbarst.
Frutselzondag 27 november 2011 @ 14:05
quote:
0s.gif Op vrijdag 25 november 2011 21:50 schreef Resistor het volgende:
Dan sta je toch even raar te kijken, als 'opeens' (als leek zijnde) een vulkaan voor je ogen uitbarst.
Lijkt me dat het nog gevaarlijk kan zijn ook... maar goed, dat ding barst wel vaker uit dus misschien weten de bewoners wel wanneer het echt link wordt en wanneer niet.
Tokamakdinsdag 29 november 2011 @ 00:21
#ANONIEMdinsdag 29 november 2011 @ 07:56
Niet echt het juiste topic daarvoor.
Frutseldinsdag 29 november 2011 @ 08:48
quote:
Colombia waarschuwt voor uitbarsting Galeras
Het Colombiaans geologisch instituut (Ingeominas) heeft de evacuatie aanbevolen van zowat achtduizend mensen die in de buurt wonen van de vulkaan Galeras, in het zuiden van het land. De vulkaan toont een verhoogde activiteit en er wordt gevreesd voor een uitbarsting.

Het gaat om een waarschuwing van het niveau "oranje", het tweede niveau op een schaal van vier. "Dat houdt in dat er tekenen zijn van een erg waarschijnlijke uitbarsting in de komende dagen of weken", aldus Marta Calvache, onderdirecteur van Ingeominas.

De 4.270 meter hoge vulkaan, die niet ver van de grens met Ecuador ligt, is de laatste twintig jaar constant actief. De meest dodelijke recente uitbarsting dateert van 1993. Daarbij kwamen negen mensen om het leven. (belga/jv)
Tokamakdinsdag 29 november 2011 @ 10:43
quote:
0s.gif Op dinsdag 29 november 2011 07:56 schreef Scrummie het volgende:
Niet echt het juiste topic daarvoor.
Let ff niet op de naam van het filmpje ;)
Frutselwoensdag 7 december 2011 @ 13:56
quote:
Alertstatus Mt Sindoro (Java Indonesia) raised
After the activity continued to increase since last October, the status of Mount Sindoro in Waterford and Wonosobo regency, Central Java, Monday (5 / 12) night, upgraded its status from active to normal alert.

Sulfatara bursts of smoke and hot mud around the crater of Mount Sindoro getting bigger and growing number. In addition, the seismic activity of Mount Sindoro also increasing, so the Center for Volcanology and Geological Hazard Mitigation, improve the status of Mount Sindoro.

Increase in alert status of Mount Sindoro set on Monday around 20.00 West Indonesia Time. Communities are asked not to panic despite increased alert status. Since the 1970 phreatic eruption ago, Mount Sindoro ralatif quiet activities. (Riz)
Frutselwoensdag 14 december 2011 @ 11:16
quote:
Kolumbos submarine volcano (Santorini, Greece): 3.2 magnitude earthquake
At 19h22 GMT (21h22 local time), a 3.2 earthquake occurred at the little-known submarine volcano Kolumbos ca. 8 km NE of Santorini, Island, Greece. This marks one of the largest events in recent months.

The submarine volcano whose peak rises to just 18 m below sea level, is located on the tectonically active SW-NE fault system across Santorini which confines most volcanic vents of the Santorini volcanic complex in the past 500,000 years.

Kolumbus volcano last erupted in September 1650 following a year of frequent earthquakes. The eruption produced a large explosive pumice eruption, with ash fall recorded as far as Turkey, and built a temporary island. The main phase of the eruption triggered a devastating tsunami. Toxic gasses killed more than 25 people and hundreds of livestock on Santorini by suffocation (probably H2S).

There is no reason to state that new activity from Santorini or Kolumbus is likely in a foreseeable future but on the other hand, there are very few data available, unfortunately, to judge the situation.

We regret that the Greek monitoring institutes are not publishing more details about the ongoing activity. Access to important earthquake details such as as their depth, are not published (they are available for earthquakes in all the other regions in Greece, raising some suspect why not for Santorini...)
Frutseldinsdag 20 december 2011 @ 11:33
quote:
Vulkaanuitbarsting bij Yemen
Lokale vissers uit Salif in Yemen hebben maandagmelding gemaakt van een vulkaanuitbarsting in de Rode Zee. Het fenomeen vindt plaats bij Saba Island, die deel uit maken van de Al-Zubair archipel. De vulkaan bevindt zich op circa 30 zeemijlen van Salif City.

Volgens de vissers kan de vulkaan van afstand goed worden waargenomen en lavabommen zouden 20 tot 30 meter hoog het water uit schieten. Het zou de eerste vulkaan zijn die in dit gebied actief wordt waargenomen.
Tijd voor foto's en video's :P
Turbomuisvrijdag 30 december 2011 @ 15:14
quote:
Vulkaan in Alaska spuwt rook: luchtvaart gewaarschuwd

ANCHORAGE - Wetenschappers in de Verenigde Staten hebben een waarschuwing afgegeven over de activiteit van de Cleveland-vulkaan in Alaska. Uit satellietfoto’s is gebleken dat Cleveland een kleine uitbarsting heeft gehad, waarbij rook en as vijf kilometer hoog de lucht in is gespuwd. De vulkaan ligt precies in de lijn van vliegroutes tussen Noord-Amerika en Azi.

Cleveland ligt op Chuginadak, een eilandje op de eilandengroep Aleoeten ten zuidwesten van het vasteland van Alaska.

In juli waarschuwden wetenschappers al dat Cleveland zich lijkt op te maken voor de grootste uitbarsting sinds 2001. Toen spoot de vulkaan asdeeltjes dertien kilometer de lucht in.

Het grootste risico van Cleveland is dat het rond de vulkaan ontbreekt aan meetapparatuur. De vulkaan ligt te afgelegen om goed te kunnen worden gevolgd. De kans bestaat daardoor dat piloten van overvliegende toestellen door een uitbarsting verrast worden.
bron
marcel-odinsdag 3 januari 2012 @ 08:28
Was deze al bekend?

quote:
Duitse supervulkaan op uitbarsten?
XVStZ.jpg

Onder de wateroppervlakte van de Laacher See, een kratermeer vlakbij Koblenz, slaapt al circa 12.900 jaar een supervulkaan. Maar de laatste maanden zijn er verontrustende signalen die er op kunnen wijzen dat de vulkaan stilaan uit zijn lange slaap aan het wakker worden is. Bij een eventuele uitbarsting kan de Laacher vulkaan gemakkelijk 5 biljoen kubieke meter as en vulkanisch puin spuwen, vergelijkbaar met de uitbarsting van Pinatubo in juni 1991.

LB6aD.jpg
(Laacher See panorama)

Vulkanologen zijn er van overtuigd dat de supervulkaan nog steeds actief is, omdat er nog steeds koolstofdioxide opborrelt - wat bewijst dat de magmakamer van de vulkaan aan het 'ontgassen' is - aan de zuidoostkant van het kratermeer. De laatste maanden werden er ook verschillende kleine aardbevingen waargenomen in de directe omgeving van de Laacher See. De Laacher See bevindt zich 259 meter boven zeeniveau en heeft een omtrek van circa 8 kilometer.

OhTuP.jpg
(Koolstofdioxide borrelt op in de Laacher See)

Omdat de Duitse supervulkaan iedere 10- tot 12.000 jaar explodeert, en de laatste uitbarsting al ruim meer dan 12.000 jaar geleden is, kan de vulkaan elk ogenblik uitbarsten. Volgens experten zou een eventuele uitbarsting van de supervulkaan kunnen leiden tot wijdverspreide verwoestingen, massa evacuaties en zelfs een korte termijn globale afkoeling door de tonnen gasdeeltjes die de atmosfeer bevuilen.
bron
Jumparounddinsdag 3 januari 2012 @ 09:09
quote:
0s.gif Op dinsdag 3 januari 2012 08:28 schreef marcel-o het volgende:
Was deze al bekend?

[..]

bron
ja :)
Frutseldinsdag 3 januari 2012 @ 11:06
quote:
0s.gif Op dinsdag 3 januari 2012 08:28 schreef marcel-o het volgende:
Was deze al bekend?
zie ook
(Super)vulkaan Laacher See Duitsland:Eerste 2012 doombericht een feit?
Frutseldonderdag 5 januari 2012 @ 10:23
Eigen topic voor Rode Zee uitbarsting
Vulkaanuitbarsting in de Rode zee
Frutseldonderdag 5 januari 2012 @ 11:50
quote:
Seven Indonesian volcanoes at level-3-alert status
JAKARTA: The Centre of Vulcanology and Geological Hazard Mitigation (PVMBG) on Thursday declared that seven out of 127 volcanoes in Indonesia are in danger status of level III (alert), according to China’s Xinhua news agency.

The volcanoes are namely Mount Papandayan in West Java province, Mount Lokon and Mount Karangetan of North Sulawesi province, Mount Kawah Ijen in East Java province, Mount Anak Krakatau in the border of Banten and Lampung provinces, Mount Gamalama at North Maluku province and Mount Lewotolo in East Nusa Tenggara province, respectively.

Out of the seven volcanoes, authorities are focusing on Mount Kawah Ijen, Mount Gamalama and Mount Lewotolo as their eruption impact is the biggest compared to others, said Head of the National Agency of Disaster Mitigation BNPB) Syamsul Muarif.

He said that the BNPB and regional agencies of disaster mitigation are enhancing preparation and planning to anticipate the impact of the volcanoes activities.

Explaining further, he said that Mount Kawah Ijen contains huge danger if it erupts as it threatens as many as 9,000 people living surround the volcano.

“The biggest threat of Mount Kawah Ijen is not hot cloud, flamed material launch or volcanic ash, but is within its volcanic lake containing 30 million metre cubic of water with deadly acid level,” he said, expressing disappointment that people refuse to evacuate despite several warnings.

While, increasing activities of the Mount Gamalama will expose and force, 638 people to take refuge. Last year, there people were killed by cold lava flood of the volcano following heavy rain on the top of the volcano.

Mount Lewotolo, with eruption type of explosive holds primary danger of volcanic bombs and hot cloud. However, Syamsul said that data shows that there has been no strong eruption that claims lives since 1660.

Although Mount Lokon in the city of Tomohon of North Sulawesi has erupted on Dec 27, last year, he said such incident still does not force people to take refuge.

“Mount Anak Krakatau that erupts almost every day with small intensity does not pose any danger to people as it locates in a strait connecting the islands of Java and Sumatra.

The volcano, he said is in a growth phase and there is a small possibility that it erupts like what happened in 1883, triggering strong tsunami and claimed thousands of lives. – Bernama
rubbereenddonderdag 5 januari 2012 @ 11:58
voor de mensen die het gemist hebben Uitbarsting Etna
-CRASH-donderdag 5 januari 2012 @ 19:50
Gisteren hadden ze bij rtl nieuws van 19:30 het over de Laacher vulkaan
dat die weer aan het pruttelen is. Maar dat doet ie altijd al
maar het zou nu wat meer zijn dan normaal


Scrolde ff omhoog en zag het bericht al staan
Frutselvrijdag 6 januari 2012 @ 13:27
quote:
Evacuaties na activiteit Lewotolo vulkaan in Indonesie
KUPANG, OOST NUSA TENGGARA - Honderden mensen in de buurt van de Lewotolo vulkaan op het eiland Lembata in de provincie Oost Nusa Tenggara zijn donderdag gevacueerd nadat de vulkaan plotseling in activiteit toenam. Dit meldde persbureau Antara.

Zo'n 500 dorpelingen hebben hun huizen verlaten en zijn naar het stadje Lewoleba getrokken. Er zal bovendien snel een bijeenkomst gehouden worden op regionaal niveau om te kijken welke acties er verder nodig zijn. Dit meldde vice-districtshoofd Viktor Mado Watun van lembata.

Er komt op dit moment een dikke zwarte rookwolk uit de krater van de vulkaan. In het gebied is bovendien een sterke zwavellucht te ruiken. Ook produceert de vulkaan regelmatig een donderend geluid. Inwoners besloten dan ook en masse om hun dorpen te verlaten om veiliger gebieden op te zoeken.

Er is vanuit de overheid nog geen officieel evacuatie-plan opgesteld. Wel werd de alarm-status van de vulkaan in de voorbije dagen twee maal verhoogd, van status 1, normaal, naar status drie, op een schaal van vier.
Frutselmaandag 9 januari 2012 @ 10:17
quote:
Chilian ONEMI raises status of Lascar Volcano
This first came up in the news yesterday, but I thought it deserved its own spot. Lascar, one of the more active volcanoes of northern Chile, was placed on heightened alert status by the ONEMI (Chilean Emergency Management) on advice from the SERNAGEOMIN (Chilean Geologic Survey). The latest report from Lascar says that over 300 small earthquakes (pdf) have occurred at the volcano in the last 26 hours, leading to an elevation of its status to Yellow – however, there have been no indications of increased fumarolic activity at the volcano. Lascar has the potential to produce a large eruptive column – the 1993 eruption sent ash as fall east as Buenos Aires – with pyroclastic flows that could reach nearby towns such as Talabre. The volcano has been through a number of cycles of significant explosive activity over its >43,000 year history. However, recent activity is mostly lava dome formation in the summit crater followed by crater collapse and vulcanian to plinian explosive eruptions such as the major eruption of April 1993. However, it also have the potential to produce small explosions that will only dust ash on the countryside surrounding the volcano as it has done at least 6 times in the last decade. ONEMI is preparing for possible evacuations for people near the volcano – mostly either miners in the area or tourists at San Pedro de Atacama. If anything does occur, there is a webcam pointed at Lascar to see the action.
Frutselmaandag 16 januari 2012 @ 10:30
quote:
25 volcanoes in Indonesia show abnormal activity or are on alertstatus
Padang, West Sumatra. Twenty-five volcanoes in Indonesia are now showing abnormal activity or have been put on alert or watch status, presidential special aide Andi Arief said here on Saturday.

“According to official data, 25 volcanoes are now under alert or watch status and they must be given priority with regard to disaster mitigation planning at district or city levels,” he said at a workshop on journalists’ role in disaster management.

He said in West Sumatra there were two volcanoes that need to be closely watched, namely Mount Marapi and Mount Talang, as they are still under alert status.

Mount Marapi is located in Agam and Tanahdatar districts and rises 2891 meters above sea level, and Mount Talang (2597 meters above sea level) in Solok district was located around 40 kilometers from the provincial capital Padang.

Apart from the two volcanoes, the government and regional disaster management agencies were also giving priority attention to Mount Papandayan in West Java, Mount Karangetan and Lokon in North Sulawesi, Mount Ijen in East Java, Mount Gamalama in North Maluku, Mount Krakatau in Banten and Lampung and Mount Lewoloto in East Nusa Tenggara.

He said “it is not impossible that volcanoes that are now still normal could change to become abnormal due to earthquakes that have happened to trigger magma in the mountains to increase their activity, and therefore alertness and readiness of the people must continue to be maintained.”

Andi said earthquakes below five on the Richter Scale could trigger magma in the volcanoes to rise and so people must not only be alert over big but also small tremors.

The 4.4 magnitude earthquake like the one in Singkawang, West Kalimantan, is one of the examples, where people had never predicted before that it could happen there, he said.

“The small magnitude quake is now being studied by researchers with regard to minimizing the damage in case an eruption happens in the country as there are a lot of volcanoes in Indonesia,” he said.
Rykermaandag 16 januari 2012 @ 10:55
http://indahnesia.com/volcano/volcano.php ^O^ Inderdaad interressant site!
Frutseldinsdag 17 januari 2012 @ 15:58
Theorie: Aardbevingen Christchurch voortekenen van vulkaanuitbarsting?
1boefjezondag 22 januari 2012 @ 14:48
Nog een theorietje gevonden op het grote WWW:

2012 completes 74,000 year cycle of super volcano

2012 completes a 74,000 year cycle of super volcano – all signs point towards a massive under water eruption

India Daily Technology Team
Jan. 8, 2006

The underwater volcanoes are increasing exponentially. The harmonic tremors are also on a steep rise. A 74,000 year cycle of devastating super volcano nears as we approach 2012. The December 2004 Tsunami epicenter points towards a possible site for the super volcano.

According to some geologists, it is possible that the recent Tsunami is precursor to a massive shift in tectonic plates and a super volcanic eruption in that area dwarfing what happened even 74,000 years back.

The year 2012 is specially mentioned in many ancient civilizations as something to be scared about. Many believe that will the year when human civilizations will be threatened. It is the year some say when the whole human civilization will change forever.

74,000 years back a massive volcano in Sumatra filled the earth’s atmosphere with dark cloud for years. The event reduced the world temperature by 8 to 10 degrees Celsius. Close to 80% of the living beings including humans were dead on the earth. According legends among Indonesia tribes, the calamity was accompanied.

The super eruptions can cause massive calamity devastating all vegetations and farming in the earth causing massive starvation and hunger.

According to some geologists, the next one is due around 2012 based on that 74,000-year cycle. Many are pointing towards Yellow Stone National Park in America where Earth’s crust is wafer thin in geological scale.

Mount St. Helens has started erupting. The Geological calm of the world is extremely disturbed. Tsunamis, Landslides, Minor earthquakes in tune of thousands are shaking the whole world’s tectonic plates.

Most countries are reporting unusual weather patterns and excessive major and minor quakes. In many parts of the world lakes are losing their water and manifesting a sinkhole. Mud volcanoes and geysers in Yellow Stone National Park are manifesting excessive temperature rise and increased frequencies of eruptions.

Source:
http://www.indiadaily.com/editorial/6320.asp
MikelenniuMzondag 22 januari 2012 @ 21:57
Wauw... zou zo'n vulkaan dan echt precies om elke 74.000 jaar uitbarsten? ;)
Resistorzondag 22 januari 2012 @ 22:26
quote:
0s.gif Op zondag 22 januari 2012 21:57 schreef MikelenniuM het volgende:
Wauw... zou zo'n vulkaan dan echt precies om elke 74.000 jaar uitbarsten? ;)
8 December 2012 op de Juliaanse kalender (met dank aan Julius Caesar) of
8 Teveth 5773 op de Joodse kalender of
7 Savar 1434 op de Islamitische kalender of
1 Dey 1391 op de Perzische kalender of
30 Agrahayana 1934 op de civiele Indiase kalender

Klinken eenmaal niet zo spannend als de 21e dag van de 12e maand (vroeger was het de 10e maand) 2012

:+

(met dank aan http://www.fourmilab.ch/documents/calendar/ )
DemonRagezondag 22 januari 2012 @ 22:34
Lijstje: http://en.wikipedia.org/wiki/World's_largest_eruptions

Uitbarstingen van supervulkanen worden nog ondergesneeuwd door LIP-events (Large Igneous Provinces), waarvan eentje in Siberi zo'n 250 miljoen jaar geleden bijna al het leven op Aarde heeft uitgeroeid. Na die massa-uitsterving is het tijdperk van de dinosaurussen begonnen.
Frutselmaandag 30 januari 2012 @ 13:56
quote:
Santorini quake swarm continues- Greek media pick up news now
The highly unusual swarm of earthquakes SW of Santorini on the main fault zone that also defines the volcanic vents of the region continues with about 10 quakes larger than magnitude 2 during the past 24 hours. 2 of the quakes were magnitude 4 and 4.7, respectively.
Greek media start to pick up the story and become increasingly interested:

Today the wall of silence seems to be falling as a major Sunday newspaper has exclusive interviews with a number of Greek seismologists and geologists on the matter and some information is now public.

1. Inflation
From 1993 until 2010 there was deflation in the caldera of about 1cm/year, since the beginning of 2011 that has changed to inflation centered at a radius of 15 km on the north part of the caldera, rapid episodes of inflation have been recorded at intervals that coincide with bursts in seismic activity. Since August the intensity of the phenomenon warranted a rise to alert level 4 (red), where it has remained ever since.

2. Magma column
A displacement of 107 cubic meters has been located 1km north of the central island of Nea Kameni at a depth of 4 km, it is hypothesized that it is a magma intrusion, located right at the center of the most seismicity active part of the caldera.

3. CO2.
Co2 levels have jumped to 39 tonnes/day along with the emission of other gasses, a rising gas column has been observed outside the port of Thirassia in the caldera (the island on the west rim).

4. Water temperature.
The rise in sea water temperature in the caldera has been confirmed.

Most of the Greek scientists have brushed any concerns saying that conditions are normal and that has happened before, Euthimios Lekkas, geologist from Athens University, even said on TV that there is no danger even of a large earthquake in the vicinity of the island, the next day there were 3 earthquakes magnitude 5 and above, 50 km to the SW at the other end of the fault line.
Noticeable exception, foreign geologists have a very different opinion, Michelle Parks, a geologist from Oxford, mentioned that the evidence points to something important, there is volcanic activity and the volcano is now potentially active at depth.

Consensus is that the volcano has woken up in early 2011, but opinions differ mainly on the lines of nationality of the scientists.
Frutseldinsdag 7 februari 2012 @ 16:07
quote:
Semeru volcano alert status raised to level 3
A slight increase in activity of Semeru volcano's activity has been observed by the Indonesian Geological Survey in recent weeks and its alert level was raised to 3 (out of 4, "watch") on 3 February 2012, after it had been on level 2 since 16 July 2009.

Only small to moderate eruptions had been occurring over most of the past year. Between 29 December and 15 January, 8 explosions were counted which produced ash clouds up to 600 m high. One explosion threw incandescent bombs to a distance of 300 m from the Jonggring Seloko crater. During 15-29 January, only weak explosions were recorded and a small steam and ash plume rising 25-50 m was observed.

Between 30 and 31 January, 5 explosions were recorded. They produced incandescent fallout in up to 400 m distance. On 2 February at 07:47 local time, a stronger explosion produced incandescent bombs that reached 750 m distance and caused a small avalanche of blocks rolling down a distance of up to 2.5 km (note: no pyroclastic flows). The heightened activity triggered the raise in alert level the following day.

At its present status level of 3, PVMBG recommends to stay away at least 4 km from the summit on the SE side of the volcano and climbers are advised not to approach the Jonggring Seloko crater less than 1 km.
As of 6 February, no significant changes to its activity have been reported by our correspondent on location.
Frutseldinsdag 14 februari 2012 @ 12:14
quote:
Alertstatus Galunggung (Indonesia) raised
The alert status of Galunggung volcano in West Java, Indonesia, was raised today (Mon 13 Feb 2012) due to an increase of its water temperature and a change in color.

Discoloration of the crater lake had started to be noticed in September 2011, but the changes have increased recently. According to the local volcanologists monitoring the volcano, the whole lake is now of muddy khaki color. In addition to the color change which could be caused by an increase of lake fumarole activity, an steep sudden increase by 13C of the lake water temperature was detected, based on measurements taken on and before 5 February when it was at normal 27C, and on 8 Feb, when it was 40C warm.
Most fish in the lake have died and occasionally dead birds are found at the shore.
No other signs of a possible volcanic awakening were detected at the moment. The ph level of the water is still at normal levels 7-8, and there is no sulfur smell. Also, no significant seismic activity has been detected.
Nevertheless, PVMBG has now placed the volcano at alert level 2 ("watch", on a scale of 1-4) and recommends to stay away at least 500 m from the lake shore.

The last eruptions of Galunggnug was a small phreatic explosion in 1984, and the major destructive eruption in 1982-83, which produced violent explosions with ash columns reaching 20 km height, pyroclastic flows and large lahars. The eruption destroyed an older lava lake, killed many people and displaced up to 35,000.
The eruption is infamous for the aircraft accident on 24 June 1982: a British Airways Boeing 747 with 262 people on board flew through the ash plume and had to make an emergency descent after the ash caused all 4 engines to fail; fortunately, the plane could land safely.

The present-day crater lake (Danau kawah Galunggung) has a diameter of 1000 m and is 11 m deep and contains a volume of about 8 million m3 of water.
In the middle of the lake, a small 250 x 165 m diameter scoria cone which was produced during the final staged of the 1982-83 eruption rises to 30 m elevation.
A main hazard of the volcano are phreatic and phreatomagmatic eruptions capable of draining the lake and producing mud flows.
Frutseldinsdag 14 februari 2012 @ 15:42
quote:
Nine small ash explosions at Fuego
Weak ash explosions continue at Fuego volcano. INSIVUMEH reported for 13 February that 9 eruptions were counted, producing plumes up to 500 m high and occasional rumbling noises. A steam plume is rising constantly about 100 m from the crater. The ash drifted 8 miles WSW.
The new lava flow on the southwest flank in the direction of the Taniluya ravine is still active and about 200 m long. Blocks that detach from its front form small block avalanches that reach the vegetation.
Frutselzondag 19 februari 2012 @ 17:30
quote:
Mt.Fuji Japan: Signs of unrest
Reports are appearing about unrest and signs of a possible awakening of Mt Fuji volcano in Japan.
According to a report which includes an unclear photo of the area, a row of new craters, the largest 50 m in diameter, has appeared on the eastern flank of the volcano at 2200 m elevation. Steam was observed erupting from these vents.

The observation joins other signs suggesting a gradual reawakening: A swarm of earthquakes including 4 of magnitude 5 have occurred northeast of Mt Fuji on and after 28 January. An earlier 6.4M quake occurred under the volcano on 15 March 2011. The report also mentions increased activity from a fumarole vent at 1500 m elevation and hot spring areas at the eastern flank observed since 2003.

These locations seem to be aligned geographically, and are probably connected. Dr. Masaaki Kimura of Ryukyu University is quoted to admit that there is an increased risk of and eruption on the eastern flank and that the status of the volcano should be closely monitored.
1boefjezondag 19 februari 2012 @ 19:21
Weet iemand een goede site om de situaties in Japan te volgen.
Aardbevingen/uitbarstingen. En dan vooral natuurlijk nu mount Fuji ;)
Frutselwoensdag 22 februari 2012 @ 11:55
Spreek je Japans? Of kan je het lezen?
Frutselwoensdag 22 februari 2012 @ 11:56
quote:
New cracks in Canlaon Volcano crater Philipinnes
Three 50 m wide cracks have appeared on on the upper flank of Canlaon volcano (also spelled Kanlaon) near the crater after the M6.7 earthquake on Negros island in the Philippines on 6 Feb 2012.
According to PHILVOLCS, the Philippine volcano monitoring agency, the cracks were caused by the earthquake and are not likely a precursor for a new eruption, which would be the first since 2006, although Canalon is one of the country's most active volcanoes. A more detailed investigation is
planned and the mountain was for now closed for climbers.

Erik Klemetti on his more detailed post on Eruptions Blog mentions rightly that a major hazard from Canlaon volcano are landslides and mud flows, and that these are not necessarily related to an eruption, but can be triggered as well by heavy rain and gravitational instability caused by earthquake movements. In this context, the cracks should be examined and monitored carefully.
Frutselmaandag 27 februari 2012 @ 19:32
113004.jpg

quote:
New eruptions at Rincon de la Vieja Costa Rica
It has been almost exactly 14 years since the last eruptive period for Rincn de la Vieja in Costa Rica, but it looks like the volcano might be awakening from its break. Last Thursday (Feb. 22), the volcano experienced two small explosions in the early morning. Seismic records suggest the volcano also had small explosions on Feb. 19 and 20, according to the OVSICORI report for Feb. 25 (PDF). None of the explosions caused any damage to anything near the volcano and there are no reports of ash fall other than in the crater itself. These explosions are very similar in style to the September 2011 explosions that were like phreatic in nature — that is, not new magma but superheated water generated the explosions. Of course, it is likely that new magma intruding the volcano is the heat source for the water, but these explosions could precede a new magmatic eruption by months or years (or lead to nothing at all). The volcano sits within a national park in Costa Rica and after these explosions, the National Emergency Commission has declared the crater area off-limits to visitors.

The last major eruption from Rincn de la Vieja was in 1966, when it produced at VEI 3 event that generated pyroclastic flows. All the way back in circa 1820 B.C., the volcano produced the Ro Blanco tephra from a larger VEI 4 eruption. The summit of the volcano hosts a small crater lake (see above), which could potentially add to the initial explosivity of any eruption as the water interacts with erupting magma. There are also abundant mudpots and springs within the national park as well, attesting to the persistent geothermal activity in the area. This geothermal activity is the reason why the Costa Rican government is looking to build a 200 MW geothermal energy plant in the National Park as well.
Weathermanvrijdag 9 maart 2012 @ 21:34
De Nevado del Ruiz vulkaan komt tot leven

De Nevado del Ruiz vulkaan, wiens uitbarsting 26 jaar geleden ongeveer 25.000 mensen het leven koste geeft weer tekenen van activiteit. De vulkaan heeft zich ruim twintig jaar slapende gehouden, zei de Colombiaanse geologische groep Ingeominas vandaag. De Colombiaanse luchtmacht heeft vanmorgen, samen met een aantal geologen een observationele fly-over gemaakt, tijdens de fly-over hebben ze de Nevado del Ruiz vulkaan gefotografeerd. Daar deden ze een verontrustende ontdekking, aan de oost kant van de krater zagen de geologen as op de gletsjer liggen. Naast de as was er ook een rookpluim zichtbaar van ongeveer 1,5 kilometer hoog. Gedurende de dag werd er ook een toename aan seismische activiteit waargenomen en een toename aan zwaveldioxide. Al deze factoren aan te geven dat de vulkaan aan het opwarmen is.

2dv33v7.jpgFoto: Manizales

De Nevado del Ruiz is een 5321m hoge stratovulkaan van de Andesketen, gelegen in Caldas, Colombia. Het is de meest noordelijk gelegen vulkaan van de Andean Volcanic Belt, en ligt ten westen van Manizales, met de stad Armero in de vallei eronder. In 1985 produceerde een uitbarsting een lahar die heel Armero bedekte en ongeveer 23000 mensen het leven kostte. De Nevado del Ruiz werd gevormd door subductie van de oceanische Nazca Plaat onder de continentale Zuid-Amerikaanse Plaat. Stratovulkanen in de Andes zijn voor het merendeel pliniaans, en Nevado del Ruiz is daarop geen uitzondering. In de twee steden rondom de vulkaan heeft de Nevado del Ruiz de bijnaam "de Slapende Leeuw".

Meteo-Service.nl
Againzendervrijdag 9 maart 2012 @ 23:09
quote:
0s.gif Op vrijdag 9 maart 2012 21:34 schreef Weatherman het volgende:
De Nevado del Ruiz vulkaan komt tot leven

De Nevado del Ruiz vulkaan, wiens uitbarsting 26 jaar geleden ongeveer 25.000 mensen het leven koste geeft weer tekenen van activiteit. De vulkaan heeft zich ruim twintig jaar slapende gehouden, zei de Colombiaanse geologische groep Ingeominas vandaag. De Colombiaanse luchtmacht heeft vanmorgen, samen met een aantal geologen een observationele fly-over gemaakt, tijdens de fly-over hebben ze de Nevado del Ruiz vulkaan gefotografeerd. Daar deden ze een verontrustende ontdekking, aan de oost kant van de krater zagen de geologen as op de gletsjer liggen. Naast de as was er ook een rookpluim zichtbaar van ongeveer 1,5 kilometer hoog. Gedurende de dag werd er ook een toename aan seismische activiteit waargenomen en een toename aan zwaveldioxide. Al deze factoren aan te geven dat de vulkaan aan het opwarmen is.

[ afbeelding ]Foto: Manizales

De Nevado del Ruiz is een 5321m hoge stratovulkaan van de Andesketen, gelegen in Caldas, Colombia. Het is de meest noordelijk gelegen vulkaan van de Andean Volcanic Belt, en ligt ten westen van Manizales, met de stad Armero in de vallei eronder. In 1985 produceerde een uitbarsting een lahar die heel Armero bedekte en ongeveer 23000 mensen het leven kostte. De Nevado del Ruiz werd gevormd door subductie van de oceanische Nazca Plaat onder de continentale Zuid-Amerikaanse Plaat. Stratovulkanen in de Andes zijn voor het merendeel pliniaans, en Nevado del Ruiz is daarop geen uitzondering. In de twee steden rondom de vulkaan heeft de Nevado del Ruiz de bijnaam "de Slapende Leeuw".

Meteo-Service.nl
dat was in 85 zo´n nare ramp, verschrikkelijk goed door camera´s vastgelegd. Zit het op youtube terug te kijken nu, wordt er weer naar van :{
Overigens was de oorzaak van de ramp vooral het smeltwater, niet eens de zwaarte van de eruptie?
Frutselmaandag 12 maart 2012 @ 23:04
quote:
Alertstatus of Ijen Volcano (Java) raised to 3 again
The official alert level for Ijen volcano in East Java, Indonesia, has been raised again to 3 ("alert") due to an increase in activity, our Indonesian correspondant Andi reports.
A new 10 m wide gas vent, which erupted buring gasses, was observed on 10 March at 17 m distance from the shore. Thick steaming, larger than usual, forming a thick white column of sulfur steam 200 m high was already noted since 3 March. Measurements of the lake water temperature at 5 m depth had also shown increased values of 42.70 deg C.

On 10 March, the lake surface was 2 meters higher than normal, although this could be attributed to heavy recent rain fall.

Another sign of increased activity is that many leaves of trees and other plants around the crater have died recently, suggesting higher than normal SO2 levels.

Seismic activity has been rising as well. Since 22 Feb, a near contiuous tremor signal has been being recorded. In the interval 22-31 Feb, there were 52 harmonic tremor periods lasting up to 20 minutes, as well as 17 2 low-frequency earthquakes, 38 mostly shallow volcanic quakes. This number increased to 306 tremor episodes lasting up to 25 minutes, 27 low frequency, and 125 mostly shallow volcanic earthquakes during the latest observation period between 1-10 March.

Ijen volcano in East Java, famous for its turquoise acid lake Kawah Ijen and the sulfur mine inside its crater, had been on higher alert starting 18 December 2011, but was lowered to alert 2 on 4 Feb this year, but is now again at the second highest level of 3, meaning that volcanologist think an eruption could be imminent. Access to the crater is currently closed.
Frutselwoensdag 14 maart 2012 @ 13:48
quote:
Smoke plume from Colombian volcano on Monday
MANIZALES, COLOMBIA (CBS) -- A rising smoke plume from a Colombian volcano put nearby cities and towns on alert as it continued to emit smoke, vapor and ash Monday.

The Nevado del Ruiz volcano, located in central Colombia about 130 kilometers (80 miles) west of Bogota, has been on yellow alert since October 2010 and began spewing ash and smoke last week.

The director of the Manizales seismic observatory, Gloria Cortes, said they are keeping a close eye on the volcano and monitoring seismic activity as they work with local officials to ensure the safety of nearby residents and tourists in the area.

"The local committee leaders, led by the area mayors, and given the current state of activity, have made a decision regarding the level of alert for the different areas and cities," Cortes said.

Authorities from cities in the volcano's proximity say they too are carefully watching the situation and have issued green and yellow alerts depending on how close they are to the volcano.

The mayor of Manizales, Jorge Eduardo Rojas, said his city is on green alert for now adding that could change if activity increases.

"Everyone needs to be ready for any situation. However, the city alert, which is at green, is still green and is not going to change though we are of course carefully watching for any changes on Nevado [del Ruiz]," Rojas, said.

Other cities closer to the crater are on an elevated yellow alert, though they say populated centers are not in imminent danger at the moment.

Thus far, the smoke plume has not caused any problems for air traffic.

The volcano's yellow alert means an eruption is possible though not definite. If it passes to orange it signifies an eruption is likely in weeks.
Frutselmaandag 19 maart 2012 @ 14:27
quote:
More emissions from Mexican volcano
The Popocatepetl volcano registered 14 exhalations of low intensity accompanied by water vapor, gas and a low amplitude spasmodic tremor, reported the National Center for Disaster Prevention (Cenapred). In its latest report, the agency of the Ministry of the Interior (Interior Ministry) explained that the exhalations of greater intensity occurred yesterday 13:30 and 22:42 hours. He said that although during the night, a glow was observed in the crater, the other metrics do not show major changes, so the light status of volcanic alert remains at yellow stage two. Observers should expect more moderate exhalations, some with ash emissions, sporadic explosions are also likely to issue short incandescent fragments and slight glow in the crater can also be observed at night.
Vertaald uit El Universal
Frutselvrijdag 23 maart 2012 @ 08:47
quote:
Mexican quake may have triggered San Salvador volcano activity
The Mexican 7.4 magnitude earthquake near Acapulco on Tuesday might have affected the currently dormant San Salvador volcano in 1000 km distance and triggered an earthquake swarm under the volcano.

San Salvador volcano is an active stratovolcano immediately northwest of the capital San Salvador City and last erupted in 1917.

The National Service of Territorial Studies (SNET) reported that as of yesterday 21 March 05:30 pm local time, the swarm consisted of 25 quakes, including 8 felt quakes between magnitude 2.2 and 3.3. The quakes were located at shallow depths between 0.5 and 5.8 km under the volcano.
The Red Cross is reported to have sent some members to the volcano area as a precautionary measure, although there were no reports of casualties or damage.

It is possible that the strong Mexican earthquake was the trigger for this swarm as a result of tectonic disturbance of the magma chamber beneath the volcano. Relationships between large earthquakes and volcanic eruptions with effects occurring up to a year after the quake have long been suggested, but are difficult to proof.
Tokamakvrijdag 23 maart 2012 @ 10:10
Nog mooier:

quote:
'Beving Mexico geboorte vulkaan'
Toegevoegd: donderdag 22 mrt 2012, 22:10
Update: donderdag 22 mrt 2012, 22:10


De zware aardbeving die dinsdag Mexico trof, is waarschijnlijk het eerste signaal van de geboorte van een nieuwe vulkaan. Een groep geologen en seismologen van de Nationale Universiteit van Mexico is vandaag bij het epicentrum van de beving in het dorp Ometepec een onderzoek hiernaar begonnen.

De aarde in het centrum van Mexico is sinds dinsdag niet meer tot rust gekomen. Er zijn al ruim tachtig naschokken geregistreerd. Vandaag alleen al waren er meer vijftien bevingen, de zwaarste met een kracht van 5,0 op de schaal van Richter. De bevingen waren goed voelbaar in Mexico-stad en leidden opnieuw tot paniek.
Baby-vulkaan

Het is niet de eerste keer dat de Mexicanen getuige zijn van de geboorte van een nieuwe vulkaan. Een paar honderd kilometer van Ometepec ligt de Paricutn, bijgenaamd de baby-vulkaan, de jongste vulkaan ter wereld.

In 1943 opende zich de vlakke grond hier en kwam een dikke stoom vermengd met stenen naar buiten, later gevolgd door een lavastroom, die twee dorpen geheel verzwolg. In acht maanden tijd groeide de vulkaan tot een hoogte van 365 meter. Hij is 9 jaar actief gebleven.
mouzzervrijdag 23 maart 2012 @ 16:22
quote:
New” Mexican Volcano Caused by the Oaxaca Earthquake? Not Likely.
This week saw a very strong earthquake in an area of southern Mexico – a M7.4 event centered 25 km from Ometepec. It looks like it was a relatively shallow earthquake (~15 km) that was related to thrusting due to the subduction of the Cocos plate under Mexico. Although this earthquake was larger than we might expect in Mexico, it is in a zone of high earthquake hazard, so the earthquake itself was not surprising – remember, subduction zones and earthquakes go hand in hand. The effects of the earthquake on the area have been significant, with over 1000 building collapsed or damaged, but thankfully few lives were lost.

After the earthquake, there has been a flurry of news in Mexico about a supposed “new volcano” that appeared between Huajintepec and Huixtepec municipality of Ometepec. The details are scant, but the mayor of the district claims the new volcano to be “tiny” (but in other articles, he says the “volcano” has been there “for many years”). As usual, there is a lot of misleading coverage, like this story that shows a picture of an undersea vent at NW Rota 1 in the Marianas Islands (with no caption to say so). There is also a lot of speculation in the Mexican media that the “new volcano” might somehow have caused the earthquake or all the aftershocks being felt in the region.

Now, there are quite a few reasons why it is very unlikely that there is a “new volcano” formed by the Oaxaca earthquake or that the earthquake was somehow caused by this supposed volcano.

First, why this earthquake didn’t cause a “new volcano”: Although volcanoes in subduction zones are common, the location of volcanoes is not arbitrary. This is why we get ranges of volcanoes. The Cascade volcanoes in the U.S. all occur well inland from the actual point where the Juan de Fuca plate subducts under North America (the “trench). If we look at the active volcanoes of Mexico (below), the volcanic arc is almost 300 km from Ometepec, so the likelihood a new volcano would occur there has a very low probability (next to zero) – you have to go a long way from Ometepec to find active volcanoes. Some articles have been comparing this to the emergence of Parcutin in 1943 – a case of an actual “new volcano”, but Parcutin is smack in the middle of the active volcanic belt. To get magma to form, melting of the mantle has to occur and in subduction zones, to do that, you need water to come off the oceanic crust that is being pulled under the overriding plate. The water only comes off at a certain depth (which is related to temperature), so the location of the volcanic arc tends to be hundreds of kilometers from the trench (however, it varies from subduction zone to subduction zones based on the angle of the slab beneath the overriding plate).

Second, why any “new volcano” can’t be the source of the seismicity in Oaxaca: Whenever geoscientists examine earthquakes, we look at how the earth moved along the fault. This produced the famed “beachball” diagrams of the focal mechanism of an earthquake. For earthquakes generated by magma rising under a volcano, we want dilation/extension as the crust moves out of the way to let the magma through. The Oaxaca earthquake had a reverse/thrust motion, meaning that the force was compressional, not dilation. This sort of motion is not consistent with magma movement and is very consistent with thrust faulting due to the subduction zone. The many aftershocks from the earthquake are highly common from any large earthquake, so a “new volcano” is just not necessary to explain the 80+ aftershocks felt so far.

So, all this “news” about a new volcano in Mexico is likely the product of media hysteria after a disaster. The only actual “observations” I’ve seen is claims of “hot water gushing/bubbling” after the Oaxaca earthquake, but hot springs are common along faultlines in many locations around the world. This doesn’t mean that magma near the surface is the source of heat, but hot water will follow faults to reach the surface. A new earthquake might open new pathways for this water. However, with such scant information, it is hard to say that even that is happening near Ometepec. What I can safely say is that a “new volcano” is not very likely at all, both in causing the earthquake or being produced by the earthquake.

http://www.wired.com/wire(...)rthquake-not-likely/
Frutselwoensdag 28 maart 2012 @ 12:12
quote:
Vulkanen actiever bij volle maan
Italiaans onderzoek van de Stromboli heeft geleerd dat vulkanen actiever zijn bij Volle Maan. Dat meldt de website Geopersdienst.nl.

Aardwetenschappers Gianluca Sottili, van het Istituto di Geologica Ambientale e Geoingegneria in Rome, en Danilo Palladino, van de Sapienza-Universiteit in Rome, analyseerden de explosies die zich voordeden in de krater van de Stromboli van juni 2010 tot oktober 2011.

En uitbarsting per vijf minuten
De Stromboli bevindt zich even ten noordoosten van het eiland Sicili in Itali, en is al minstens tweeduizend jaar continu actief. Gemiddeld eens per vijf minuten vindt er een uitbarsting plaats, aldus de website.

De onderzoekers concludeerden dat het aantal explosies per uur bij Volle of Nieuwe Maan significant hoger ligt dan het gemiddelde voor de hele maand. Maar bij springtij is er lang niet altijd een groter aantal per uur. In sommige maanden was de activiteit dan zelfs het laagst.

Ook uit eerdere onderzoeken aan andere types vulkanen blijkt dat de stand van onze natuurlijke satelliet de kans op een uitbarsting kan benvloeden. Hoe dat precies in zijn werk gaat is nog niet duidelijk.

Aantrekkingskracht van de Maan
De Italiaanse aardwetenschappers denken dat het gaat om de aanvoer van magma vanuit de relatief ondiepe magmakamer. Omdat het gesteente rondom het gangenstelsel waarin de magma zit door de aantrekkingskracht van de Maan elke veertien dagen een klein beetje wordt samengedrukt en weer uitzet, zal de magmatoevoer dezelfde regelmaat vertonen - en daarmee ook de frequentie van de uitbarstingen.
Roel_Jewelmaandag 2 april 2012 @ 10:39
Uit de oude doos:

tungurahua_taschler_960.jpg

quote:
Volcano Tungurahua sometimes erupts spectacularly. Pictured above, molten rock so hot it glows visibly pours down the sides of the 5,000-meter high Tungurahua, while a cloud of dark ash is seen being ejected toward the left. Wispy white clouds flow around the lava-lit peak, while a star-lit sky shines in the distance. The above image was captured in 2006 as ash fell around the adventurous photographer. Located in Ecuador, Tungurahua has become active roughly every 90 years since for the last 1,300 years.
rubbereendmaandag 2 april 2012 @ 20:45
wow
Frutselwoensdag 4 april 2012 @ 14:33
quote:
Nevado del Ruiz seems to be getting closer to a new eruption.

INGEOMINAS reports that during the last week, there has been a significant increase in the activity of the volcano, which can be summarized as follows:

- From March 27, there have been phases of volcanic tremor pulses related probably to deep magma movements

- Since the last week, there were seismic signals interpreted with rock fracturing, i.e. dike intrusions, located west of the active crater. Similar seismic activity was observed prior to the eruptions in November 1985 and September 1989, although this time it is less energetic.

- On March 29 at 10:54 local time, for a period of 25 minutes, there were over 135 earthquakes located south of Arenas crater at a depth of about 4 km.
- From 04:00 am local time on 31 March, there has been a significant increase in seismicity of events associated with fluid movements and fracturing of rock located in the active crater.
- SO2 emissions continue at high levels.

According to the diagnosis made so far, INGEOMINAS expects an eruption in the coming weeks, but smaller in size than those in November 1985 and September 1989.
Frutselvrijdag 6 april 2012 @ 12:00
quote:
Dangerous Colombian volcano may erupt soon
Colombia's snowcapped Nevado del Ruiz volcano has lately shown signs pointing towards an immanent eruption.

An "Orange" alert has been posted, meaning that the volcano could erupt within days to weeks, the Smithsonian/USGS Weekly Volcanic Activity Report web page said on Thursday.

The Andean volcano's last important eruptions happened in 1985 and 1989, the 1985 eruption having led to Colombia's worst natural disaster.

During the last week of March, tremors shook the volcano with increasing, according to the Colombian government agency, INGEOMINAS. Volcanologists interpreted the quakes as telltales for "rock fracturing" and "fluid movement" within the volcano.

Seismicity remained "elevated" during the first days of April, the report said.

According to the Smithsonian website, Nevado del Ruiz is spread over more than 200 square km (about 80 square miles) in central Colombia.

Standing more than 17,000 feet above sea level, the highest reaches of the volcano are clad in permanent snow and ice, the near-equatorial location notwithstanding.

The conflict between hot lava and ice on Nevado del Ruiz has proven deadly in the past.

During the November 1985 eruption, melting of the ice cap generated lahars, volcanic mudflows, which swept down the mountain's six main river valleys, the Wikipedia Nevado del Ruiz web page said.

A lahar following the Lagunilla Valley swept through the town of Armero, killing three-fourths of its 28,700 residents. In all, more than 23,000 people were killed and about 5,000 more were injured, according to Wikipedia.
Frutseldinsdag 17 april 2012 @ 22:22
quote:
Alert level raised for 'Popo'
MEXICO CITY, April 17 (UPI) -- Mexico Tuesday advised residents of Puebla state to take further precautions as the Popocatepetl volcano continued to show ominous signs of life.

A Yellow Level 3 alert was posted for the area around the volcano Tuesday, meaning there was a intermediate or high probability of a violent eruption, which would range from an ash cloud to a possible explosion.

Schools were shut down in the area and residents were advised to stay inside and keep their windows closed to keep out the moderate amounts of ash that have been escaping from the mountain, CNN said.

Puebla state officials earlier evacuated a 7-kilometer (4.3 mile) perimeter around the mountain.

Scientists monitoring the volcano said Tuesday they saw glowing lava inside the crater overnight and recorded a 40-minute tremor.

Popocatepetl, known as Popo, is located not far from Mexico City and has not experienced a major eruption since 2000.
Frutselwoensdag 18 april 2012 @ 10:30
Popocatepetl (Popo) vulkaan nabij Mexico-stad staat op springen
Jumparoundzondag 22 april 2012 @ 22:00
Meer kan ik er mobiel niet van maken...

translate.google.com/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=www.igepn.edu.ec%2Findex.php%2Frecursos%2Fnoticias%2Fitem%2F633-explosi%C3%B3n-en-el-volc%C3%A1n-tungurahua.html
Frutseldonderdag 3 mei 2012 @ 16:10
7128666611_e3440ca6c5_o.jpg

quote:
This is pretty interesting news – the NASA Aqua satellite spotted an eruption going on at Mt. Curry* in the South Sandwich Islands. The South Sandwich Islands are located to the southeast of South America in an odd subduction zone where South America is subducting under the Sandwich microplate. Not much is known about Mt. Curry on Zavodovski Island – it is a basaltic stratovolcano (typical in island arcs) and it is thought to have last erupted in 1819, although the Global Volcanism Program lists a number of unconfirmed small eruptions as recently as 1930. These images of Curry from 2000 show that the volcano does produce minor plumes, so this could be more of a strong steam-and-ash plume than a new eruption. However, confirmation will be difficult as few people live in the South Sandwich Islands and Zavodovski Island is uninhabited, so we’ll likely be relying on remote sensing to track this eruption. This eruption has some shades of Nabro – remote, not well known and spotted by satellite first.
Bron: Wired
Frutseldinsdag 5 juni 2012 @ 13:56
quote:
Manum Island's volcano erupting

A new series of eruptions have begun on Manam Island off Madang in Papua New Guinea, with warnings to residents to take precautions.

Manum Island's volcano erupting

The volcano is one of the most active in PNG claiming several lives over the last decade.

Vents on the volcano are glowing at nights and explosions in the craters can be heard more than 15 kilometres away.

Ima Itakarai, the assistant director of the Rabaul Volcanology Observatory says it's possibility of a major explosion cannot be ruled out, but it's not imminent.
Frutseldinsdag 24 juli 2012 @ 11:16
quote:
Activity at Mt Tongariro on Northern Island of New Zealand
On Friday, I noted that GNS Science has seen an increase in volcanic seismicity at Tongariro, a volcanic complex on the southern end of the Taupo Volcanic Zone on the North Island. Tongariro itself is made of the older Tongariro proper and the younger Ngauruhoe (famously the model for Mt. Doom in the Lord of the Rings movies). The initial information was that there were over 20 small volcanic earthquakes during a few days in mid-July, much higher than the normal background seismicity. Now it seems that volcanic gas emissions from Tongariro are up as well.

The latest GNS Science report says that although Tongariro does consistently release volcanic and hydrothermal gases, volcanic gas emissions are up significantly since the last measurement. Now, these gases are likely carbon dioxide and sulfur dioxide (the typical gases measured for monitoring), which are not hazardous to people in low concentrations (only rarely does CO2 reach levels that can kill in volcanic settings). Even with these increases in volcanic gases, GNS Science has not raised the alert status beyond Level 1 (above typical background).
Frutseldinsdag 31 juli 2012 @ 16:36
'Vulkanisme kan flink groeien'
mouzzermaandag 6 augustus 2012 @ 16:55
quote:
0s.gif Op dinsdag 24 juli 2012 11:16 schreef Frutsel het volgende:

[..]

en zojuist tot uitbarsting gekomen:

Tongariro erupts, alert level raised

Residents in the area have told GNS of hearing several loud explosions, lightning and plumes of smoke.

They have also reported bright red rocks flying out of the mountain.

http://www.nzherald.co.nz(...)=1&objectid=10825125
Frutselmaandag 6 augustus 2012 @ 16:57
Zat er al een tijdje aan te komen, rommelde al een week of twee daar.
Thx voor het melden !

is dat de White Volcano of is dat weer een andere daar in die hoek?
mouzzermaandag 6 augustus 2012 @ 17:22
quote:
14s.gif Op maandag 6 augustus 2012 16:57 schreef Frutsel het volgende:
Zat er al een tijdje aan te komen, rommelde al een week of twee daar.
Thx voor het melden !

is dat de White Volcano of is dat weer een andere daar in die hoek?
Dit is weer een andere, White Volcano is volgens mij een eiland voor de kust en de Tongariro ligt in een national park midden op noordereiland. Deze uitbarsting zou bij de Te Mari Crater zijn, hier te zien op de voorgrond:

NZ07_8564.jpg
Frutselmaandag 6 augustus 2012 @ 20:15
Uitbarsting vulkaan in Nieuw Zeeland

ff NZH stuk vertaald
Frutselmaandag 6 augustus 2012 @ 20:15
quote:
0s.gif Op maandag 6 augustus 2012 17:22 schreef mouzzer het volgende:

[..]

Dit is weer een andere, White Volcano is volgens mij een eiland voor de kust en de Tongariro ligt in een national park midden op noordereiland. Deze uitbarsting zou bij de Te Mari Crater zijn, hier te zien op de voorgrond:

[ afbeelding ]
WhiteIsland is ook actief, vandaar dat ik me vergiste :D
Frutseldinsdag 7 augustus 2012 @ 11:24
Frutseldinsdag 7 augustus 2012 @ 11:25
Drebbelmanwoensdag 29 augustus 2012 @ 13:01
quote:
Mooi. White Island is continu actief, maar heeft dus 6 augustus een kleine uitbarsting gehad, de activiteit is even omhoog geschroefd naar niveau 2, maar inmiddels weer terug naar 1.

Over dat eiland heb ik nog gelopen, voelde best leip.
Frutselzondag 9 september 2012 @ 22:12
quote:
Evacuaties in Nicaragua vanwege vulkaan
In het noordwesten van Nicaragua zijn ongeveer 3000 inwoners gevacueerd, nadat een vulkaan as en gas begon uit te stoten. De autoriteiten hebben militairen naar het gebied gestuurd, maar honderden mensen waren al uit zichzelf weggegaan.

De San Cristbal-vulkaan begon gisterochtend te rommelen, kort nadat er explosies waren gehoord. Rond de vulkaan hangt een dikke rookwolk.

De autoriteiten verwachten de komende tijd meer uitbarstingen van de vulkaan.

De San Cristbal is een van de actiefste vulkanen van Nicaragua. De afgelopen jaren zijn er geregeld kleine erupties geweest.


[ Bericht 22% gewijzigd door Frutsel op 09-09-2012 22:19:10 ]
Frutselzondag 9 september 2012 @ 22:16
quote:
Fuego vulkaan in Guatemala ook weer actief
De vulkaan Fuego in de Midden-Amerikaanse staat Guatemala is weer actief. Aan de voet van de berg ligt de toeristische stad Antiguea, Fuego is n van de meest actieve vulkanen in de regio. Op dit moment spuugt Fuego een dikke rookpluim tot anderhalve kilometer de hoogte in.

Voorlopig is er geen gevaar voor de bewoners in de buurt, maar het luchtverkeer kan er last van ondervinden. In mei spuugde de vulkaan grote hoeveelheden as en lava uit.
Frutselmaandag 10 september 2012 @ 11:31
652430923.jpg

mooie foto uit Nicaragua
Basp1maandag 10 september 2012 @ 11:52
Nog geen direct ontploffingsgevaar, maar interessant genoeg om hier te melden lijkt me:

quote:
Magma duwt Grieks eiland omhoog

SANTORINI/LONDEN - Onder het Griekse eilandje Santorini hoopt vulkanisch gesteente zich op. Hierdoor komt het eiland steeds iets hoger boven de zeespiegel te liggen.

Dat blijkt uit een onderzoek van Britse wetenschappers, dat zondag is gepubliceerd in het wetenschapsblad Nature Geoscience.

Tussen januari 2011 en april 2012 is Santorini zodoende 14 centimeter hoger boven de zeespiegel komen te liggen.

Volgens de Britse wetenschappers is er in ruim een jaar tijd 10 tot 20 miljoen kubieke meter magma vanuit de diepe lagen van de aarde de vulkaan ingestroomd. Normaal is daar 10 tot 20 jaar voor nodig.

Volgende uitbarsting

Volgens de onderzoekers zien ook de bewoners van het eiland dat de vulkaan zich anders gedraagt. Toch kunnen ze niet voorspellen wanneer de eerstvolgende uitbarsting is.

Santorini, een toeristische trekpleister, is een vulkanisch eiland. De laatste grote uitbarsting had 3600 jaar geleden plaats. De omliggende eilanden werden toen bedolven onder meters puimsteen.
Frutselmaandag 10 september 2012 @ 12:20
True :Y
Maar volg Santorini al een tijdje... al lijkt het, aan het topic te zien, dat ik dat in me eentje doe :P

Seismische onrust rondom Santorini Griekenland
Stokkie_maandag 10 september 2012 @ 18:02
Vulkanen wereldwijd zeer actief

Actief weekje afgelopen week
stan12maandag 10 september 2012 @ 19:43
Weet iemand iets meer over die bevingen in de Vesuvius? Kan niks vinden
Frutselmaandag 10 september 2012 @ 22:50
quote:
0s.gif Op maandag 10 september 2012 18:02 schreef Stokkie_ het volgende:
Vulkanen wereldwijd zeer actief

Actief weekje afgelopen week
ik zie er eigenlijk weinig speciaals in... elke week zijn er tig vulkanen actief... ?
maar of het nu echt meer is dan normaal?
Frutselmaandag 10 september 2012 @ 22:50
quote:
0s.gif Op maandag 10 september 2012 19:43 schreef stan12 het volgende:
Weet iemand iets meer over die bevingen in de Vesuvius? Kan niks vinden
Hoe kom je daar bij?
Frutselmaandag 10 september 2012 @ 22:57
je bedoeld denk ik de aardschokken die gevoeld zijn bij Campi Flegrei...? Dat is de supervulkaan bij Napels?

Italiaanse media melden wel wat (vertaald in Engels)

quote:
It 'returned to normal seismic activity in Campi Flegrei. Today, there have been no events that is beyond the ordinary, confirm the Observatory. The phenomenon, however, should not be underestimated and demands attention, he warns, the president of the Campania geologists, Francesco Peduto.

And meanwhile, the City has initiated inspections and controls in public, especially in schools. "What occurred yesterday morning is an event that demands attention. I can not see at the time, real situations of concern. Bradyseism This is a cyclical phenomenon that repeats itself, as the experience of the 70s and 80s reminds us - Peduto says - It 'important to assess the evolution of the situation in order to understand if it is a small crisis or something more substantial. "The movements of the earth continue, by 2005, in an upward phase of the soil, but have not reached the critical recorded yesterday morning with about 200 shocks in two hours and three events above magnitude 1, sequence 1.6, 1.1 and 1.5 all accompanied by explosions. The President of the Order of Geologists of Campania points the finger on strategies to cope with earthquakes and in particular on the preparation of evacuation plans. "We need to accelerate these projects - he says - We are ready to provide experts to collaborate and monitor the various situations." Meanwhile, the mayor, Vincent Figliola, he indicated that it introduce the personnel of the technical inspections for the verification of the public. Prepared a special map to check all school facilities that next week will resume in a complete activity and public buildings and municipal health office locations. From the initial findings did not reveal situations of structural damage to buildings, resulting from seismic events of yesterday.
Bron
Frutselvrijdag 14 september 2012 @ 11:31
Volcn de Fuego barst uit in Guatemala
Frutselwoensdag 19 september 2012 @ 10:45
Meerdere Indonesische vulkanen raken op stoom
Frutselmaandag 24 september 2012 @ 11:37
Frutseldinsdag 20 november 2012 @ 18:52
WKN / Nieuw-Zeelandse vulkaan Ruapehu (Mount Doom) staat op uitbarsten
Frutselwoensdag 28 november 2012 @ 11:47
quote:
Russian Volcano Erupts After 36 Years of Inactivity

VLADIVOSTOK -- The Interfax news agency said the Plosky Tolbachik volcano started erupting on Tuesday night. It was the volcano's first eruption since 1976. Located in the Kamchatka Peninsula, the 3,085-meter high volcano erupted and spewed an ash column seven km. into the atmosphere. The ash cloud then started to move northwest as lava oozes down the southern slope of the volcano. The volcanic ash later fell in the villages of Krasny Yar and Maiskoye, creating a layer that is about four centimeters thick. The eruption prompted authorities to issued an orange alert although there is no significant risk to any populated area. Plosky Tolbachik is located in the southwestern section of the Klyuchevsky group of volcanoes in eastern Kamchatka and approximately 343 km. away from Petropavlovsk-Kamchatsky. Authorities observed a considerable increase in seismic activity and registered more than 130 volcanic tremors at Plosky Tolbachik.
summer2birddinsdag 11 december 2012 @ 19:21
En, zijn de vulkanen al een beetje op gang voor 21 december?
Frutseldinsdag 18 december 2012 @ 16:50
quote:
7s.gif Op dinsdag 11 december 2012 19:21 schreef summer2bird het volgende:
En, zijn de vulkanen al een beetje op gang voor 21 december?
In Ecuador wel.. (is een ander topic over ) :P
Frutseldinsdag 18 december 2012 @ 16:51

quote:
A volcano which started erupting in far east Russia late last month continued to spew lava, plumes of ash and smoke into the air on Sunday. The volcano has attracted tourists to the region despite temperatures down to minus 30 Celsius (minus 86 Fahrenheit). Local residents and tourists have been warned by authorities against visiting the area, citing the danger of hot lava and poisonous gases that come to the surface during the eruption
betreft volgens mij de Plosky Tolbachik van iets hierboven
Frutselmaandag 24 december 2012 @ 11:49
WKN / Uitbarsting vulkaan Copahue op grens van Chili en Argentinie
Frutseldonderdag 27 december 2012 @ 18:14


Nicaragua nu ook
Frutselzaterdag 29 december 2012 @ 22:47
http://m.youtube.com/#/wa(...)ure%3Dyoutu.be&gl=NL

vulkaan in Indonesie
1boefjedinsdag 1 januari 2013 @ 21:12
Ik bedacht me een interessante vraag. Als vaste volger van alles wat er met vulkanen te maken heeft....
Wat is eigenlijk de laagste vulkaan op land boven zee-niveau?
Mauna Kea, Hawaii is de hoogste berg ter wereld. De vulkaan komt 4205 meter boven de zeespiegel uit.
Masaya in Nicaragua is 635 m.
Zijn er lagere?
Frutseldinsdag 1 januari 2013 @ 21:42
In Afrika, ethiopie, ligt er volgens mij eentje onder zeeniveau op land. Geen idee verder. Google is ur vriend denk ik :p
-CRASH-dinsdag 1 januari 2013 @ 21:50
quote:
12s.gif Op dinsdag 1 januari 2013 21:12 schreef 1boefje het volgende:
Ik bedacht me een interessante vraag. Als vaste volger van alles wat er met vulkanen te maken heeft....
Wat is eigenlijk de laagste vulkaan op land boven zee-niveau?
Mauna Kea, Hawaii is de hoogste berg ter wereld. De vulkaan komt 4205 meter boven de zeespiegel uit.
Masaya in Nicaragua is 635 m.
Zijn er lagere?
De laagst gelegen vulkaan op het land onder zeeniveau is (als ik het goed gelezen heb)
Dallol met 45 meter.
Danakil Depression, northeast of the Erta Ale Range in Ethiopia.
1boefjewoensdag 2 januari 2013 @ 16:00
Thanks,

ik ga eens even kijken hoe dat precies komt. Is het de 'leeftijd', het materiaal wat de vulkaar uitstoot (of niet). Ik vind het best interessant. Een 5 km hoge vulkaar ga je namelijk niet zo snel beklimmen, maar de Masaya, daar waren we zo boven....

Google was this time not my best friend......
Basp1woensdag 2 januari 2013 @ 16:05
quote:
12s.gif Op dinsdag 1 januari 2013 21:12 schreef 1boefje het volgende:
Ik bedacht me een interessante vraag. Als vaste volger van alles wat er met vulkanen te maken heeft....
Wat is eigenlijk de laagste vulkaan op land boven zee-niveau?
Mauna Kea, Hawaii is de hoogste berg ter wereld. De vulkaan komt 4205 meter boven de zeespiegel uit.
Masaya in Nicaragua is 635 m.
Zijn er lagere?
Dat zijn vulkanen die wederom net boven de zeespiegel uit aan het komen zijn. Bijvoorbeeld dat ding bij de canarisch eilanden die aan het bubbelen is als die eenmaal boven de zee uitkomt is die het laagste.

De anak krakatau is ook niet zo hoog,189 meter: http://nl.wikipedia.org/wiki/Anak_Krakatau
1boefjewoensdag 2 januari 2013 @ 16:20
Dallol is echt heel apart! Mooi.

Basp1, ik had het niet over eilanden (vulkanen omringt door zee), maar echt op een continent.
Basp1woensdag 2 januari 2013 @ 16:46
quote:
12s.gif Op woensdag 2 januari 2013 16:20 schreef 1boefje het volgende:
Dallol is echt heel apart! Mooi.

Basp1, ik had het niet over eilanden (vulkanen omringt door zee), maar echt op een continent.
Continenten zijn ook ontstaan door vulkanische activiteit. Dan zou je ook hawai natuurlijk niet mee moeten nemen in de uitleg van je eerdere vraag. ;)
1boefjewoensdag 2 januari 2013 @ 17:29
Of je moet hem goed lezen, LOL.
Wat is eigenlijk de laagste vulkaan op land boven zee-niveau?

Mount Fuji dan ipv Hawaii :-p

Maar dan klopt het antwoord ook weer niet, Dallol ligt echt op land onder zeeniveau...

Hahaha

Snap er zelf niks meer van 8)7
Frutselvrijdag 18 januari 2013 @ 14:09
quote:
Verhoogde activiteit bij de Stromboli
Sinds vier dagen neemt de activiteit van de vulkaan Stromboli toe in intensiteit. Het gelijknamige eiland in de Tyrrheense Zee is gehuld in een enorme rookwolk afkomstig van de vulkaan, zo meldt het Italiaanse geofysisch instituut.

De vulkaan is weliswaar permanent actief, maar zondagnacht vond een zware explosie plaats, waarna een lavastroom naar zee vloeide. Acht uur later was een enorme rookwolk te zien, vergezeld van een nieuwe lavastroom. De afgelopen uren werden 23 seismische bewegingen waargenomen.

Burgemeester Marco Giorgianni van Stromboli heeft zijn 500 burgers al laten weten dat de situatie onder controle is en dat ze geen enkel risico lopen. Het Italiaanse geofysisch en vulkanologisch instituut volgt de situatie op de voet.
Laatste week zouden er tien (nieuwe) actieve vulkanen zijn bij gekomen. Op het Russisch grondgebied is het op dit moment het 'drukste' . Negen vulkanen zijn daar nu actief.
WKN / Russische vulkaanuitbarstingen: Wereldwijde zorgen?
Frutselvrijdag 18 januari 2013 @ 14:13


en deze is van 30-12-2012

Frutseldinsdag 29 januari 2013 @ 21:37
quote:
Japanese scientist predicts Mount Fuji to erupt by 2015

Ever since the Great East Japan Earthquake of 2011, seismologists and volcanologists have been keeping a close eye on Mount Fuji. According to Masaki Kimura, a professor emeritus at Ryukyu University, signs are pointing to an imminent explosion by 2015.

He says the volcano should have erupted in 2011 as well, but there is a usual four-year margin of error, which should run out by 2015. Also, the experts monitoring the activity of the volcano says its “magma chamber pressure” had risen to 1.6 megapascals. This is higher than the chamber pressure that preceded its last eruption more than 300 years ago, which was triggered by a massive earthquake near Osaka a month before.

Kimura also says that magma is rising from beneath Mt. Fuji and cracks in the crust have been increasing. Other signs to its impending eruption are the rising water level of nearby Lake Sai, numerous steam explosions and the increasing number of volcanic earthquakes. The partial collapse of the Sasago expressway tunnel in December last year which killed nine people wasn’t caused by an earthquake but may have been triggered by the deformation of the tunnel, which Kimura believes to be connected to Mt Fuji activity where “some things hanging above have been falling”.

In 2012, a huge fault line measuring 21 miles was discovered beneath Mt. Fuji and an earthquake along that fault line could actually cause the volcano to collapse entirely. Experts speculate that in the eventuality of an explosion, cost to human life would be low (due to slow-moving lava) but the damage to public and private property will be huge.
quote:
Fuji eruption could force 567,000 people to evacuate

SHIZUOKA – An eruption of Mount Fuji could force some 567,000 people to evacuate their homes, according to a new estimate.

The projection is part of an evacuation plan crafted by the Shizuoka Prefectural Government that also says more than 130,000 people, comprising some 50,000 households, would have to relocate if lava were to reach residential districts in the city of Fuji, which lies just south of the 3,776-meter mountain.

Depending on the number and locations of vents, evacuation from wider areas could be needed. The plan is based on a hazard map prepared by the central government based on Fuji’s last eruption, in 1707.

Under the evacuation plan, 10 zones have been designated at the foot of the mountain based on the expected direction of lava flows.

The plan specifies evacuation zones in four grades.

The Yamanashi Prefectural Government is preparing a similar evacuation plan.

Plans will be finalized at a consultation forum involving Shizuoka, Yamanashi and Kanagawa prefectures and the central government. Joint evacuation drills in the three prefectures will also be conducted.
-CRASH-zondag 24 februari 2013 @ 12:45
Een vulkaan in de stad :? (2009)
Frutselwoensdag 27 februari 2013 @ 16:44
quote:
Alertlevel at Sabancaya (Peru) volcano raised to orange
Over the past few days, the Peruvian Geologic Survey (Ingemmet) has noted a sharp increase in seismicity underneath one of the more active volcano’s in the southern part of the country: Sabancaya. Over 500 earthquakes were recorded under the volcano between February 22-23 and with an accompanying increase in fumarole emissions (steam and volcanic gases) from the summit (see above), Ingemmet chose to raise the alert status at Sabancaya to Orange. The fumarolic activity at the summit is especially notable the new steam/gas plume reached over 100 meters over the volcano (although this can also be mitigated by weather conditions) — and closely followed the onset of the new seismicity.

Interestingly, before this new seismic swarm and fumarolic activity began, I noted on Twitter an interesting sequence of earthquakes near Sabancaya. On February 22, three M4.9-5.3 earthquakes struck within 2 hours of each other ~30-40 km to the northeast of the volcano (see below). All these earthquakes were fairly shallow (10-18 km) — in fact, much shallow than much of the historic seismicity in the area. I noted the earthquakes because of their location between Sabancaya and another large Peruvian volcano, El Misti. Now, this is where we have to worry about chickens and eggs — there is no evidence for a connect between these earthquakes and the new unrest at Sabancaya. [SPECULATION] However, it does leave open the potential that (a) the earthquakes could have triggered this new unrest or (b) the earthquakes are part of the new unrest. Under option (a), these earthquakes might not have been directly related to magmatic activity/movement, but their proximity to Sabancaya disturbed the magmatic or hydrothermal system at the volcano. Under option (b), these earthquakes could be the intrusion of a new batch of magmatic itself — however, their distance from Sabancaya seems a little far for that to be the case. My [wild] hunch here might be that the three earthquakes might have “jostled” the hydrothermal system at Sabancaya, producing an increase in hydrothermal flow leading to more intense fumaroles and resulting in an earthquake swarm as the hydrothermal system re-establishes itself. Now, this is not to say that magma movement under the volcano isn’t a potential cause as well — as Ingemmet collects more data, such as the types/amounts of volcanic gases in the fumaroles and can survey the volcano looking for deformation, their geologists can then make a more definitive statement about the nature of the unrest at Sabancaya. Jersy Mario Salaza from Ingemmet did, however, mention that this unrest is similar to the unrest prior to the volcano’s eruptions in the late 1980s and early 1990s.
Frutselmaandag 11 maart 2013 @ 21:00
Frutseldinsdag 14 mei 2013 @ 11:27
2020980117.gif
quote:
Alaska volcano threatens to blow
Anchorage - Another volcano in Alaska is heating up, with seismic instruments signalling a possible eruption.

The Alaska Volcano Observatory says tremors were detected Monday at Pavlof Volcano, 1 000km southwest of Anchorage.

John Power, the US Geological Survey scientist in charge at the observatory, said satellite imagery shows the volcano is "very, very hot".

Pavlof is 60km from the community of Cold Bay. The volcano last erupted in 2007.

It's the second Alaska volcano to rumble this month.

Cleveland Volcano, on an uninhabited island in the Aleutian Islands, experienced a low-level eruption in early May.

Power said satellite imagery shows the volcano continues to discharge steam, gas and heat, although no ash clouds have been detected in the past week.

Cleveland is not monitored with seismic instruments.
Woestijnvoszaterdag 18 mei 2013 @ 11:49
quote:
Vulkaan Alaska schiet aswolk 4,5 kilometer de lucht in

media_xll_1658385.jpg

De Pavlof vulkaan in Alaska, n van de onrustigste vulkanen in het gebied, heeft vannacht een indrukwekkende aswolk 4,5 kilometer de lucht in geblazen.

Volgens luchtverkeersleider John Maxwell zal het internationale vliegverkeer naar verwachting weinig hinder ondervinden van de uitbarsting. Daarvoor moet de as een hoogte van bijna 10 kilometer bereiken.

De uitbarsting begon afgelopen maandag. De inwoners van de nabij gelegen gemeenschap Cold Bay zijn bezorgd dat de as de elektriciteitsgenerators zullen beschadigen.
Bron: AD
stan12maandag 27 mei 2013 @ 22:01
Vulkaan Chili op uitbarsten
Vorig jaar spuwde Copahu as uit, maar kwam niet tot een uitbarsting Vorig jaar spuwde Copahu as uit, maar kwam niet tot een uitbarsting EPA
Toegevoegd: maandag 27 mei 2013, 21:13
Update: maandag 27 mei 2013, 21:21

Bij de Copahu-vulkaan in Chili moeten duizenden mensen hun huis verlaten. De vulkaan staat volgens kenners op uitbarsten. Volgens de minister van Binnenlandse Zaken is de evacuatie niet vrijblijvend, maar moeten de mensen hun huis uit.

De evacuatie van meer dan 2000 mensen in een omtrek van 25 kilometer rond de vulkaan zal minstens 48 uur duren. De zware regenbuien in het gebied bemoeilijken de evacuatie.
Verhoogde activiteit

De bijna 3000 meter hoge vulkaan, op de grens van Argentini en Chili, vertoont al een tijdje verhoogde activiteit. Ook in Argentini wordt de vulkaan goed in de gaten gehouden, maar daar wordt nog niemand gevacueerd.

Ook eind vorig jaar spuwde Copahu as uit, maar toen kwam het niet tot een uitbarsting. De laatste grote uitbarsting was in 2000.

http://nos.nl/artikel/511443-vulkaan-chili-op-uitbarsten.html
Frutselwoensdag 19 juni 2013 @ 16:51
quote:
In Mexico is een eruptie van vulkaan Popocatpetl eergisteren vastgelegd door een webcam. Op deze fel versnelde beelden zie je hoe de vulkaan een enorme wolk van as en stof uitbraakt.
Frutselmaandag 15 juli 2013 @ 16:55
Update over Ecuador:
WKN / Uitbarsting vulkaan Tungurahua in Ecuador
Frutselmaandag 22 juli 2013 @ 13:26
quote:
Omwonenden vulkaan Merapi op de vlucht

De vulkaan Merapi op het Indonesische eiland Java spuwde maandag rook en as. Honderden inwoners van dorpen aan de voet van de vulkaan zijn op de vlucht geslagen.

De vulkaan spuwde de donkerrode as duizend meter de lucht in, maar een uitbarsting bleef uit en de geldende alarmfase werd niet verhoogd.

De bijna drieduizend meter hoge Merapi is de actiefste van de vijfhonderd vulkanen die Indonesi telt. Bij de laatste grote uitbarsting, in 2010, vielen 347 doden.
Turbomuiszaterdag 10 augustus 2013 @ 14:24
media_xll_1794612.jpg

Bij een vulkaanuitbarsting in het oosten van Indonesi zijn zaterdag zeker vijf mensen om het leven gekomen. Dat heeft de Indonesische rampendienst gezegd. De vulkaan braakt rook en grote aswolken uit.

De vulkaan, de Rokatenda, in de provincie Oost-Nusa Tenggara, barstte zaterdagochtend in alle vroegte uit. Vijf mensen werden gedood door de lava die uit de vulkaan stroomde. Bijna drieduizend mensen zijn gevacueerd. De vulkaan was al sinds oktober 2012 actief.
humorduck28zaterdag 10 augustus 2013 @ 23:08
quote:
0s.gif Op zaterdag 10 augustus 2013 14:24 schreef Turbomuis het volgende:
[ afbeelding ]

Bij een vulkaanuitbarsting in het oosten van Indonesi zijn zaterdag zeker vijf mensen om het leven gekomen. Dat heeft de Indonesische rampendienst gezegd. De vulkaan braakt rook en grote aswolken uit.

De vulkaan, de Rokatenda, in de provincie Oost-Nusa Tenggara, barstte zaterdagochtend in alle vroegte uit. Vijf mensen werden gedood door de lava die uit de vulkaan stroomde. Bijna drieduizend mensen zijn gevacueerd. De vulkaan was al sinds oktober 2012 actief.
Machtig... misscien cliche, maar niets is tegen de natuur opgewassen, zelfs de mens niet. (excuses voor de emoticon, heb hem verwijderd)
YazooWzondag 18 augustus 2013 @ 18:58
article-2396611-1B5A6655000005DC-106_964x662.jpg
quote:
Sakurajima volcano in southern Japan erupts with ash plume

A volcano in southern Japan has erupted, creating a spectacular plume of ash five kilometers (3.1 miles) high.

The ash cloud from Sakurajima, an already active volcano in the prefecture of Kyushu, is the highest volcanic plume ever recorded for the volcano.

According to the local meteorological observatory in Kagoshima, the eruption began at 1641 Japan local time (0741 GMT) with the large plume of smoke rising upwards to 5,000 meters above the crater.

The meteorological observatory also reported a pyroclastic flow travelling approximately one kilometer southeast down the slope of the 1,117 meter-high volcano.

Local residents in Kagoshima City held towels to their mouths and wore masks to protect themselves from soot and ash as smoke filled the streets temporarily.
Frutselzondag 18 augustus 2013 @ 22:19
quote:
0s.gif Op zondag 18 augustus 2013 18:58 schreef YazooW het volgende:
[ afbeelding ]

[..]

cool! :Y
Wil je die hier nog toevoegen aub?

WKN / Spectaculaire uitbarstingen vulkaan Sakurajima in Japan
YazooWzondag 18 augustus 2013 @ 22:22
Done, wist niet dat die vulkaan een eigen topic hier had.
Frutselzondag 18 augustus 2013 @ 22:32
Geeft niet en thx. Soms is het ook wat onduidelijk :p
Frutselmaandag 19 augustus 2013 @ 12:20
quote:
August 17, 2013 – ALASKA – Seismic unrest is being reported at another Alaskan volcano. Tanaga is a 5,924-foot (1,806 m) stratovolcano located in the remote Aleutian Range of the U.S. state of Alaska. There have been three known eruptions since 1763. The most recent was in 1914 and produced lava flows. According to the Earthquake Report, a swarm of seven earthquakes have struck near the volcano in the last 24 hours- the strongest of which was a 4.7 magnitude. This may suggest magma intrusion under the volcano.

Number 69: Iceland - A small phreatic eruption seems to have taken place yesterday at the ice-covered Kverkfjoell central volcano. The steam-driven (no fresh magma involved) explosion followed a small glacial flood on 15 August the Kverkjkull glacier released into the Volga river and was probably a result of the pressure release during the flood. –Volcano Discovery

Kliuchevskoi (Kamchatka): A new eruption began at 06:30 UTC on 15 August, KVERT reports. Accompanied by strong tremor, strombolian activity has been taking place in the summit crater. Incandescence at the summit of the volcano’s summit were observed at night and a gas-steam plume containing small amounts of ash rose up to 18,000 ft (5.5 km) a.s.l. and drifted to the north-east of the volcano on August 16. Satellite data showed a big and bright thermal anomaly over the volcano on August 15-17. – Volcano Discovery
Red_85dinsdag 20 augustus 2013 @ 11:02
White Island, NZ is ook onrustig.

http://www.nzherald.co.nz(...)=1&objectid=11111633
http://www.geonet.org.nz/volcano/info/whiteisland

Nog steeds trouwens die Dino in beeld :P
Frutseldonderdag 22 augustus 2013 @ 12:48
quote:
Indonesia Warns of Rising Volcanic Activity in East Province
JAKARTA, Indonesia—Indonesian authorities have been warning local villagers in East Nusa Tenggara Province about increasing volcanic activities in the area in recent days.

“The people around the areas should continue to practice caution” despite there not having been fresh volcanic activity on Wednesday, said Sutopo Purwo Nugroho, the spokesman of the National Disaster Mitigation Agency.

The agency reported on Tuesday two volcanoes in the East Nusa Tenggara Province have shown “increasing activities.” The volcanoes are subsea Mount Hobalt and and Mount Ili Werung.

It noted Mount Hobalt erupted Tuesday morning, spewing cloud as high as 6,560 feet above the sea level for around two minutes.

“Visually, the water near the volcano turned yellow and bubbly,” the agency said.

Meanwhile, Mount Ili Werung, located on the southern part of Lembata Island, started rumbling just before dusk Tuesday for about an hour and a half.

But the agency said, at least so far, it isn’t necessary for the villagers to evacuate their villages.

Six people were killed in the small Palue Island in the province when Mount Rokatenda erupted on Aug. 10, spewing hot ash and smoke up to 6,560 feet into the air. Nearly 3,000 people were evacuated from the area in the island since it first rumbled in October 2012.

East Nusa Tenggara is about 1,297 miles east of Indonesia’s capital city of Jakarta. Just west to the province is West Nusa Tenggara Province, famous for the Mount Tambora, whose eruption in April 1815 is cited as the largest volcanic eruption in the world in recorded history. The precise death toll from the eruption remains unclear, but it is believed to be at least 71,000. The eruption caused a “volcanic winter,” a reduction in temperature cause by volcanic ash and droplets of sulfuric acid. It made 1816 known as the year without summer due to the effects of the weather in North America and Europe.
GekkePoesvrijdag 23 augustus 2013 @ 19:30
xsr9ijQ.gif
DemonRagevrijdag 23 augustus 2013 @ 20:23
volcano_stefnisson_960.jpg

Vulkanische bliksem. :Y)
chufivrijdag 23 augustus 2013 @ 20:26
quote:
0s.gif Op vrijdag 23 augustus 2013 20:23 schreef DemonRage het volgende:
[ afbeelding ]

Vulkanische bliksem. :Y)
Mooi
DemonRagevrijdag 23 augustus 2013 @ 20:30
Vulkanische waterhozen bestaan ook:
175195.JPG
Frutseldinsdag 27 augustus 2013 @ 12:13
WKN / Vulkanische "geiser" barst uit, vlakbij het vliegveld van Rome
Frutseldinsdag 27 augustus 2013 @ 12:14
quote:
0s.gif Op vrijdag 23 augustus 2013 20:23 schreef DemonRage het volgende:
[ afbeelding ]

Vulkanische bliksem. :Y)
Welke berg is dat? Eyfrutseljoekel op IJsland?
YazooWzaterdag 31 augustus 2013 @ 22:27
Veniaminof volcano, Alaska.

18 Augustus:
quote:
3HdYeW4.jpg
Aerial view of the eruption at Veniaminof's intracaldera cone, August 18, 2013. This cone rises about 1000 feet above the surrounding icefield. It has been intermittently erupting lava, ash and steam since June 13, 2013. This photo shows the incandescent, orange stream of molten lava emerging from the active cone. Steam billows from the pit at the base of the cone where the lava encounters and melts ice and snow. A small, ash-rich plume rises just above the vent producing a diffuse ash cloud that drifts downwind. In the foreground, round white patches probably represent ballistic impact craters. Photo taken by Game McGimsey, AVO/USGS. This overflight of Veniaminof was co-sponsored by the National Geographic Society.
http://avo.alaska.edu/images/image.php?id=56211
30 Augustus:

quote:
ALASKA VOLCANO OBSERVATORY DAILY UPDATE
Saturday, August 31, 2013 11:13 AM AKDT (Saturday, August 31, 2013 19:13 UTC)


VENIAMINOF VOLCANO (CAVW #1102-07-)
5611'52" N 15923'35" W, Summit Elevation 8225 ft (2507 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Increased seismicity characterized by elevated levels of continuous tremor is continuing. Lava fountaining and ash emissions are likely occurring at the intracaldera cone of Veniaminof Volcano. No ash plumes have been observed in satellite images over the past 24 hours and local web camera views of the volcano have been obscured by clouds and fog. AVO has received no reports of ash fall on nearby communities, but this remains a possibility as the elevated levels of seismic activity continue.

If ash fall does occur, the amounts are not expected to be significant and likely will be less than 1/16 inch, although areas within a few miles of the intracaldera cone could receive thicker amounts of ash fall. Information about volcanic ash and its potential effects can be found on the AVO web page (www.avo.alaska.edu).
Frutselvrijdag 6 september 2013 @ 13:58
quote:
Vulkaan in Peru blijft rook spuwen
De Ubinasvulkaan in het zuidwesten van Peru blijft rook en as spuwen. De vulkaan is al een hele week bijzonder actief en daar lijkt niet snel verandering in te komen. Integendeel, vulkanologen verwachten dat het tot een echte uitbarsting zal komen. "De rook en as die we nu zien zijn typische verschijnselen die een uitbarsting aankondigen", zegt Pablo Masias, een Peruviaanse vulkanoloog. De 150 inwoners van het dorpje Querapi, aan de voet van de vulkaan, zijn uit voorzorg gevacueerd. De Ubinas wordt beschouwd als een van de actiefste vulkanen ter wereld. Sinds de 16e eeuw kwam het al meer dan 20 keer tot een uitbarsting. In 2006 spuwde de Ubinas een rookwolk 9 kilometer de lucht in.
-CRASH-zondag 8 september 2013 @ 16:05
Mix a little plume of smoke escaping from Mt. Etna
with condensation to get this 'map pin' of a cloud over
the volcano that began erupting a half million years ago.

1186291_600692136640744_2129656070_n.jpg
https://www.facebook.com/FragileOasis
#ANONIEMzondag 15 september 2013 @ 12:14
Duizenden vluchten voor vulkaanuitbarsting in Indonesi

media_xll_6128876.jpg

Na een vulkaanuitbarsting in Indonesi zijn duizenden mensen op de vlucht geslagen. Vanmorgen (plaatselijke tijd) begon de vulkaan Mount Sinabung in de provincie Noord-Sumatra as en gesteente te spuwen, aldus de rampenbestrijdingsdienst.
Een dokter deelt maskers uit aan mensen die in de buurt van Sinabung wonen. reuters.

Circa 2.700 mensen die in de omgeving van de vulkaan wonen, moesten de regio verlaten. De autoriteiten kondigden de op een na hoogste waarschuwingsfase af.

In 2010 was de Sinabung voor de eerste keer in 400 jaar uitgebroken. Toen moesten rond de 12.000 mensen have en goed achterlaten.

hln
Perrinzaterdag 26 oktober 2013 @ 18:55

De Etna puft weer een beetje.

(bron)
Frutselzaterdag 26 oktober 2013 @ 22:08
Cool. Er was ergens een etna topic maar vindt hem ff niet op mobiel
GekkePoeszaterdag 26 oktober 2013 @ 22:18
quote:
1s.gif Op zaterdag 26 oktober 2013 22:08 schreef Frutsel het volgende:
Cool. Er was ergens een etna topic maar vindt hem ff niet op mobiel
WKN / Uitbarsting Etna
Frutselzondag 27 oktober 2013 @ 13:32
quote:
thenk u !
Frutseldinsdag 29 oktober 2013 @ 14:43
Nieuwe erupties op Kamchatka... (Far East Russia) en Mt. Erebus op Antarctica lijkt zich ook te roeren...
cynicuszondag 3 november 2013 @ 12:16
Via BadAstronomy (bazen blog!):

quote:
In the extreme northeast region of Russia is the Kamchatka Peninsula. Familiar to people who play the board game Risk, Kamchatka is a huge mass of land sticking out into the north Pacific, and sitting on the peninsula is a cluster of volcanoes, some of them among the most active on the planet.

The biggest of these is Klyuchevskaya Sopka, a monster stratovolcano towering over 4750 meters (15,500 feet) high. It’s also the most active, having been more-or-less erupting continuously since the late 1600s. It’s erupted a dozen times just since 2000!

On Oct. 20, 2013, the Landsat 8 Earth-observing satellite flew over Klyuchevskaya, capturing a tremendously long plume of ash as well as two separate lava flows moving down the volcano’s flanks:
landsat8_klyuchevskaya_detail.jpg.CROP.promovar-mediumlarge.jpg

landsat8_klyuchevskaya_full.jpg.CROP.promovar-mediumlarge.jpg

Grotere versies van de plaatjes via de BadAstronomy link :)
Frutselzondag 3 november 2013 @ 12:41
vet! thx!
het gaat maar door daar, daar zijn een stuk of wat vulkanen constant aan het uitbarsten
WKN / Russische vulkaanuitbarstingen: Wereldwijde zorgen?

je mag het daar ook wel inzetten als je wilt en leuk vindt?
cynicuszondag 3 november 2013 @ 13:03
quote:
0s.gif Op zondag 3 november 2013 12:41 schreef Frutsel het volgende:
vet! thx!
het gaat maar door daar, daar zijn een stuk of wat vulkanen constant aan het uitbarsten
WKN / Russische vulkaanuitbarstingen: Wereldwijde zorgen?

je mag het daar ook wel inzetten als je wilt en leuk vindt?
Mag ik officieel crossposten? Woei! *O*
Frutseldonderdag 14 november 2013 @ 13:47
Frutseldonderdag 14 november 2013 @ 14:02
svKFF4V.jpg
GekkePoeszaterdag 16 november 2013 @ 15:33
MK6ZyGd.png

plaatje is niet van mij, gevonden op Imgur
-CRASH-zondag 17 november 2013 @ 21:36
Active Volcano Discovered Under Antarctic Ice Sheet

antarctica-map-111010.jpg
quote:
Earthquakes deep below West Antarctica reveal an active volcano hidden beneath the massive ice sheet, researchers said today (Nov. 17) in a study published in the journal Nature Geoscience.

The discovery finally confirms long-held suspicions of volcanic activity concealed by the vast West Antarctic Ice Sheet. Several volcanoes poke up along the Antarctic coast and its offshore islands, such as Mount Erebus, but this is the first time anyone has caught magma in action far from the coast.

"This is really the golden age of discovery of the Antarctic continent," said Richard Aster, a co-author of the study and a seismologist at Colorado State University. "I think there's no question that there are more volcanic surprises beneath the ice."

The volcano was a lucky find. The research project, called POLENET, was intended to reveal the structure of Earth's mantle, the layer beneath the crust. In 2010, a team led by scientists from Washington University in St. Louis spent weeks slogging across the snow, pulling sleds laden with earthquake-monitoring equipment. [Images: Trek Across Antarctica]

Right place, right time

Two earthquake swarms struck beneath the researchers' feet in January 2010 and March 2011, near the Executive Committee Range in the Marie Byrd Land region of the continent. As the researchers later discovered, the tremors — called deep, long-period earthquakes (DLPs) — were nearly identical to DLPs detected under active volcanoes in Alaska and Washington. The swarms were 15 to 25 miles (25 to 40 kilometers) below the surface.

"It's an exciting story," said Amanda Lough, the study's lead author and a graduate student in seismology at Washington University in St. Louis. Though there were no signs of a blast, a 3,200-foot-tall (1,000 meters) bulge under the ice suggests the volcano had blasted out lava in the past, forming a budding peak.

"We can say with pretty high confidence that there wasn't an eruption while we were out there," Lough told LiveScience's OurAmazingPlanet. "We had people installing [seismometer] stations and flying airborne radar over the ice. But from the bed topography, we can see there is something building up beneath the ice."

Scientists think that underground magma and fluids pushing open new paths and fracturing rock cause deep, long-period earthquakes. Many active volcanoes in Alaska's Aleutian Islands have frequently produced these deep earthquake swarms without any signs of impending eruptions. However, researchers also monitor the tremors because a sudden uptick in shaking was seen before eruptions at Mount Spurr and Mount Redoubt in Alaska.

A volcanic flood

If the volcano in Antarctica did erupt, it would melt the bottom of the ice sheet immediately above the vent. Scientists aren't sure what would happen next. In Iceland, volcanic eruptions can melt glaciers, causing massive floods called jkulhlaups. But the ice above the Antarctic volcano is more than a half-mile (1 km) thick.

"How West Antarctic ice streams would react to an eruption a hundred or more kilometers [60 miles] inland from the grounding line is a yet-to-be-answered question," said Stefan Vogel, a glaciologist with Australian Antarctic Division who was not involved in the study. The grounding line is the spot where glaciers detach from rock and float on water.

"There is certainly a need for more research, both in mapping the distribution and monitoring the activity level of subglacial volcanic activity beneath ice sheets, as well as studying the impact of subglacial volcanic activity on the hydrological system of glaciers and ice sheets," Vogel said in an email interview.

It would take a super-eruption in the style of Yellowstone's ancient blowouts to completely melt the ice above the active volcano, Lough and her co-authors calculated. And if the volcano under the ice is similar to ones close by, such as Mount Sidley, there's no risk of a super-eruption. [Big Blasts: History's 10 Most Destructive Volcanoes]

Instead, the millions of gallons of meltwater might simply hasten the flow of the nearby MacAyeal Ice Stream toward the sea.

"People hear the word 'volcano' and get caught up in the idea that it will change the way the ice sheet works, but this stuff has been going on underneath the ice [for millions of years], and the ice sheet is in balance with it," Lough said. "Everyday magmatism isn't enough to cause major problems."

Hugh Corr, a glaciologist at the British Antarctic Survey who also discovered a buried Antarctic volcano, said an eruption could have a big effect, but it's difficult to quantify.

"The biggest effect on the West Antarctic Ice Sheet is still climate change — warming the ocean, melting the ice shelves. That's the most immediate risk, compared to if a volcano might go off," said Corr, who was not involved in the study.

A geologic puzzle

Signs of active and extinct volcanoes pop up all over Antarctica. Ash layers and lava indicate volcanoes spouted while the continent froze during the past 20 million years or more. (An 8,000-year-old ash layer sits above the newly found volcano, but it comes from Mount Waesche, a nearby peak.)

"The [West] coast of Antarctica is like a ring of fire," Corr said.

The earthquake swarms line up with older volcanoes in the Executive Committee Range, suggesting the volcanic activity there is slowly migrating south by 6 miles (9.6 km) every million years. This migration is perpendicular to the motion of Antarctica's tectonic plate, so a hotspot or mantle plume is not feeding the volcanoes, Lough said. (A mantle plume should make volcanoes that line up parallel to plate motion, like those of the Hawaiian Islands.)

The big mystery is figuring out why the volcano and its forerunners even exist. "Antarctica is certainly one of the most fascinating and enigmatic of all of Earth's continents," Aster said. [Video - Antarctica: Solving Geologic Mysteries]

Let's set the scene. Antarctica is split by an incredible mountain range. Imagine if Utah's spectacularly steep Wasatch Mountains cleaved North America from Texas all the way to Canada. That's what the Transantarctic Mountains are like. In the West, the land dives off into a deep rift valley, where the crust has been tearing apart for about 100 million years. The newly found volcano sits on the other side of this rift, in a higher-elevation region called Marie Byrd Land.

While the torn crust may seem like the best explanation for Antarctica's many volcanoes, many of the peaks fit no obvious pattern. Rifting and volcanism in Antarctica could be like nowhere else on Earth. "What is going on with the crust in Antarctica is still puzzling," Lough said.
-CRASH-maandag 18 november 2013 @ 10:27
Volcano under Antarctic ice may erupt, accelerate melting

2D9697092-131117-science-antarcticavolcano.blocks_desktop_large.jpg
Members of the research team that discovered the under-ice volcano drags equipment to install remote seismic and GPS stations at Mount Sidley in Antarctica.
quote:
A newly discovered volcano rumbling beneath nearly a mile of ice in Antarctica will almost certainly erupt at some point in the future, according to a new study. Such an event could accelerate the flow of ice into the sea and push up the already rising global sea levels.

When the volcano will blow is unknown, "but it is quite likely" to happen, Amanda Lough, a graduate student in seismology at Washington University in St. Louis, Mo., told NBC News.

"At some point, it is going to erupt," she said. "Is it going to erupt in any of our lifetimes? That is not something that we can pinpoint."

And when it does erupt, she added, "there would be an increase in melting around the area. … You would add water to the system beneath the ice sheet … and that could cause that ice stream to speed up."

In other words, global warming likely isn't the only factor causing sea levels to rise, and the discovery of a subglacial volcano adds another layer of complexity for scientists trying to model how polar ice sheets move as the world gets warmer. But what overall impact this might have on global sea levels is unknown — and up for debate.

"The implication of large amounts of under-ice water accelerating ice flow, ice discharge and, thus, raising sea levels is 'permissible,' but remains highly speculative," Robert Bindschadler, an expert on glacial ice dynamics and emeritus NASA scientist now living in Quilcene, Wash., told NBC News in an email. "The actual processes involved are still very much topics of research."

Bindschadler was not involved in the new research, which Lough and colleagues discuss in a paper published Sunday in the journal Nature Geoscience.

Surprise discovery
Hints of the unnamed volcano's existence first appeared in seismic data collected by an array of instruments strung across the West Antarctic Ice Sheet. Lough's job was to analyze the data for earthquakes. "I found this grouping of events that kept being located at the same location over and over again," she said. "And when you see something like that, you want to go see what is causing it."

She typed the quakes' location into Google Earth to look for any features that could explain the shaking. She saw a group of nearby mountains, but ruled them out as the source since they were not an exact match. But as more and more earthquakes popped up in the seismic data, her team revisited the mountains.

"We realized they are actually a chain of volcanoes that date younger as they go south and the earthquakes were south of the volcanoes," Lough said. A subsequent examination of the bedrock topography made with airborne radar revealed a slight rise above the source of the weak, low-frequency quakes.

Intrigued, Lough shipped her seismic data off to a volcano seismologist who said the signature was consistent with a type of earthquake caused by magma coursing through the Earth's crust. Though these quakes could also be caused by the movement of glacial ice, they occurred between 15 and 25 miles beneath the surface of the ice, much too deep to be related to the pile of ice not quite one mile thick.

The final clue came from a distinct layer of ash dated to about 8,000 years ago in the vicinity of the earthquake cluster. At first, Lough said, she and her colleagues thought it was from an earlier eruption of the suspected volcano, though they later concluded it was more likely from Mount Waesche, a known existing nearby volcano that, in geological terms, erupted recently.

"All of the lines of evidence just fell together nicely," Lough said. The clusters of earthquakes "are indicative of magma movement in the crust and that this area is still quite active."

Eruption consequences uncertain
The earthquakes, Lough noted, are "not necessarily a precursor" to an imminent eruption. "Any volcano that is still not extinct, that still has an active magma chamber, is going to be showing seismicity whenever you have the magma moving around in the crust."

Given the nearly mile-thick pile of ice covering the volcano, any eruption anytime soon would unlikely vent to the surface, according to Lough. Rather, the heat from the eruption would melt the surrounding ice, which would lubricate the flow of the overlying ice sheet.

"All of these processes could lead to accelerating ice mass loss in West Antarctica," John Behrendt, a geophysicist at the University of Colorado's Institute of Arctic and Alpine Research, wrote in an accompanying article in Nature Geoscience.

Whether that will happen, Bindschadler noted, is debatable.

"In my opinion, it boils down to whether the excess water would flow under the ice as a sheet or within a more confined channel," he said, adding that sub-glacial water flow typically evolves from sheets to channels. "I think, in this volcanic case, the water would start local and form a channel to get to the ocean. This would produce a minimal change to the ice sheet dynamics."

Bindschadler cautioned, however, that this is just his "reading of the tea leaves."

So little is known about the bottom of the West Antarctic Ice Sheet that models of ice motion over it are unable to reliably predict what to expect from a subglacial eruption, noted Slawek Tulaczyk, a glaciologist at the University of California, Santa Cruz.

However, the new paper, he added in an email to NBC News sent from Antarctica, "serves as an important reminder that, in addition to climate changes, one-off events such as volcanic eruptions or subglacial lake floods may influence the rate at which Antarctica looses ice to the ocean."

Woestijnvosmaandag 18 november 2013 @ 14:38
quote:
media_xll_1952714.jpg

media_l_1952715.jpg

Indonesische vulkanen Sinabung en Merapi uitgebarsten

Foto In Indonesi zijn maandag de vulkanen Sinabung en Merapi uitgebarsten. Het vliegverkeer is gewaarschuwd en er worden voorbereidingen getroffen voor evacuaties.

De 2600 meter hoge Sinabung in Noord-Sumatra stootte maandag as uit tot een hoogte van achtduizend meter, zei vulkanoloog Surono. De vulkaan 'sliep' de afgelopen drie jaar, maar heeft sinds september sporadisch erupties. Het ministerie van verkeer heeft de luchtvaart gewaarschuwd uit de buurt te blijven van de vulkaan.

Ook de Merapi in Midden-Java was maandag actief. De aswolk hier kwam niet hoger dan tweeduizend meter. Ongeveer zeshonderd gezinnen zijn verzameld om eventueel gevacueerd te wirden. Bij een uitbarsting van de Merapi eind 2010 kwamen meer dan driehonderd mensen om het leven en moesten twintigduizend omwonenden in veiligheid worden gebracht.
Bron: AD
#ANONIEMdinsdag 19 november 2013 @ 22:35
6nAsZN5.jpg

http://www.trouw.nl/tr/nl(...)n-in-Indonesie.dhtml
Frutseldonderdag 21 november 2013 @ 11:38
bUbofI2.jpg
Smoke from an erupting undersea volcano forms a new island off the coast of Nishinoshima, a small uninhabited island, in the southern Ogasawara chain of islands, on Nov. 21, 2013.

quote:
Underwater eruption creates new island of the coast of Japan
An undersea volcanic eruption created a new island in the Pacific Ocean, to the far south of Tokyo, Japan’s coast guard said on Thursday.
Coast guard footage shot on Wednesday showed heavy black smoke and clusters of rocks exploding out of the sea to form a tiny island near the Ogasawara Islands, about 621 miles to the south of Tokyo.
According to an advisory issued by the coast guard, the new islet is about 200 meters, or 650 feet, in diameter. Ash and smoke continued to erupt out of the crater, with the smoke reaching a height of almost 600 meters.
"Smoke is still rising from the volcanic island, and we issued a navigation warning to say that this island has emerged with ash falling in the area," a spokesman for the maritime agency was quoted by Agence France-Presse as saying.
The new island is close to Nishinoshima, another uninhabited island in the Ogasawara chain of islands, which is also known as Bonin Islands. The Japan archipelago, which consists of several thousands of islands, is part of a seismically active region in the Pacific Ocean known as “Ring of Fire.”
According to volcanologists, it would be too early to say whether the new island would survive, as there were past instances when newly formed islands did not last long due to erosion, the FNN News network reported.
Japan witnessed similar a volcano eruption in the region in the early 1970s and mid-1980s, and tiny islets, formed at that time, were partially or completely eroded by ocean tides.
Japan government’s spokesman welcomed the new addition to its territory and said the new island could enter the country’s map, if it survives.
“If it becomes a full-fledged island, we would be happy to have more territory,” Yoshihide Suga, Japan's chief government spokesman, told the Associated Press.
Two months ago, Pakistan also reported the birth of a new island after a huge earthquake struck the country’s southwest. Scientists believe the new island -- a mass of mud floating in the Indian Ocean -- may be a mud volcano that erupted because of the earthquake.
Mud volcanoes erupt when huge quantities of mud, water and methane gas trapped beneath the layers of the Earth are released by earthquakes.
The new island in southwest Pakistan was about 90 meters wide and about 2 kilometers from the coastline in the country's Balochistan province.
8sGHAdq.jpg
2kkBOeE.jpg
kpVaBDD.jpg
Frutseldonderdag 21 november 2013 @ 11:43
Frutseldonderdag 21 november 2013 @ 12:19
De geboorte van een nieuw eiland
rubbereenddonderdag 21 november 2013 @ 13:53
gaaf
Frutselvrijdag 22 november 2013 @ 13:28
quote:
Chaitn volcano (Chile): increased seismic activity
Friday Nov 22, 2013 09:57 AM | BY: T

Increased seismic activity has been detected under the volcano, Chilean scientists reported.
The devastating Plinian eruption of Chaitn in May 2008 forced the evacuation of the entire population of the small coastal town of Chaitn, located only a few kilometers south of the volcano. After the initial explosive phase, several lava domes have been growing slowly by extrusion of degassed, viscous magma. This phase ended in 2011 and since then, the volcano has only produced degassing.

On 20 Nov at 08:07 (local time), a volcano-tectonic magnitude 2.4 earthquake occurred at 6 km depth north-east of the volcano. It was followed by a swarm of more than 80 quakes of mostly long-period type, characteristic for movements of fluids (gasses, water, and possibly magma) inside cracks inside the volcanic edifice. They are considered potential precursors to eruptive activity. In addition, pulses of volcanic tremor and a second volcanic-tectonic quakes of magnitude 2.7 at 11:39 local time, this time at shallow 4.4 km depth were recorded.

Volcanologists from SERNAGEOMIN mentioned that at the time of publication of their report, the seismicity continued, but the official alert level of Chaitn remains green. For now, the signs of unrest are weak and it is not likely that a new eruption is immediate.
GekkePoesvrijdag 22 november 2013 @ 13:59
Als een eiland nu in internationale wateren ontstaat (niemandsland buiten verantwoordelijksgebied van enige staat.), mag je het dan claimen als je eigen eiland ?
Frutselmaandag 25 november 2013 @ 09:54
NWS / Indonesische vulkaan barst in korte tijd negen keer uit
Frutseldonderdag 28 november 2013 @ 13:34
jiFBdOx.jpg
Alaid volcano on Atlasov Island, Kuril Islands, from ISS, Nov. 18,

O+
Frutselvrijdag 29 november 2013 @ 10:39
TEaY9CR.jpg
Shiveluch volcano, Kamchatka, from ISS, Nov 18, 9.10 am local time, 1200-mm
Frutselwoensdag 4 december 2013 @ 09:48
yu5qetA.jpg
quote:
Volcano Sends Pillar Of Fire 1,000m Into Sky

With a pillar of fire stretching up into the clouds, this spectacular image captures the moment a volcano erupted in remote Russia.

The stream of lava rose up to a kilometre above the summit of Klyuchevskoy, one of the active volcanoes on the Kamchatka peninsula in the east of the country.

The volcano, which erupts around every two years, is one of the largest on-land active volcanoes, according to the US Geological Survey.

It stands at 15,584ft on the north end of a belt of 30 active volcanoes.

The dramatic picture of Klyuchevskoy was captured by photographer Marc Szeglat on October 16 at a distance of approximately 9.5 miles from its concealed cone, as the volcano erupted for the first time in three years.

The explosion triggered by the eruption could be heard from 20 miles away.

In September 1994, an eruption caused disruption after it affected airline routes across the Pacific Ocean.

The active nature of the volcano, which first began erupting in 1697, means it is still rarely a target for climbers.
Ik kan me dit bijna niet voorstellen... een kilometer de lucht in? Dit lijkt me een plaatje van een uitbarsting waarbij de lava langs de flank naar beneden raast... ook gezien de rookwolk bovenin kan ik niet voorstellen dat dit klopt?
Tokamakwoensdag 4 december 2013 @ 11:33
Ik heb een wat ouder plaatje gevonden vanuit bijna dezelfde hoek Het is inderdaad een lavastroom. Desondanks nog een beste fontein...

a7a7f9fc14.jpg
mouzzerwoensdag 4 december 2013 @ 11:37
quote:
0s.gif Op woensdag 4 december 2013 09:48 schreef Frutsel het volgende:
[ afbeelding ]

[..]

Ik kan me dit bijna niet voorstellen... een kilometer de lucht in? Dit lijkt me een plaatje van een uitbarsting waarbij de lava langs de flank naar beneden raast... ook gezien de rookwolk bovenin kan ik niet voorstellen dat dit klopt?
Is idd gewoon een lavastroom, je kan de contouren van de vulkaan in de rook zien met lavafontein bovenop.

Het is weer lekker onrustig in Kamchatka, dit was de Shiveluch vulkaan gister:

Frutselwoensdag 4 december 2013 @ 11:46
quote:
0s.gif Op woensdag 4 december 2013 11:37 schreef mouzzer het volgende:

[..]

Is idd gewoon een lavastroom, je kan de contouren van de vulkaan in de rook zien met lavafontein bovenop.

Het is weer lekker onrustig in Kamchatka, dit was de Shiveluch vulkaan gister:

Het gaat maar door daar,...
Als je wil mag je je post ook wel hierin zetten :Y
WKN / Russische vulkaanuitbarstingen: Wereldwijde zorgen?
Frutselwoensdag 4 december 2013 @ 14:52
Japans eilandje groeit gestaag verder ...


quote:
The new island continues to erupt and grow, increasing its chances of long-time survival by the day. The active vent on the islet continues to be in strombolian eruption and has by now built a new cone that is higher than the main island itself (which is 38 m).
Lava flows have significantly enlarged the island to the SE where a plateau is being built. During the 10 days, it has more than doubled its surface.
baggerbaaswoensdag 4 december 2013 @ 21:37
:o

NewsBreaker twitterde op woensdag 04-12-2013 om 21:16:00 WOW!: Russia's Klyuchevskoy volcano sends pillar of fire 1,000m into the sky http://t.co/xjc9WMudV2 via @pourmecoffee http://t.co/NlyIkV9V7M reageer retweet
Baqs7hpCAAA_0y0.jpg
Frutseldonderdag 5 december 2013 @ 08:30
quote:
0s.gif Op woensdag 4 december 2013 21:37 schreef baggerbaas het volgende:
:o

NewsBreaker twitterde op woensdag 04-12-2013 om 21:16:00 WOW!: Russia's Klyuchevskoy volcano sends pillar of fire 1,000m into the sky http://t.co/xjc9WMudV2 via @pourmecoffee http://t.co/NlyIkV9V7M reageer retweet
[ afbeelding ]
Zie een paar posts boven je... dat verhaaltje klopt dus niet :P
baggerbaasdonderdag 5 december 2013 @ 08:40
quote:
6s.gif Op donderdag 5 december 2013 08:30 schreef Frutsel het volgende:

[..]

Zie een paar posts boven je... dat verhaaltje klopt dus niet :P
O verrek |:(
Frutseldonderdag 5 december 2013 @ 09:07
quote:
0s.gif Op donderdag 5 december 2013 08:40 schreef baggerbaas het volgende:

[..]

O verrek |:(
Desondanks is het een prachtig plaatje O+
Frutseldinsdag 10 december 2013 @ 11:56
quote:
Mount Marapi erupts
The Volcanology and Geological Disaster Mitigation Center (PVMBG) Bukittinggi reported that Mount Marapi, which lies between Tanah Datar and Agam regencies, West Sumatra, erupted at 10:10 a.m., on Sunday.

“The volcano's eruption spewed a column of thick, gray ash 350 meters high,” PVMBG official Warseno said on Sunday as quoted by Antara news agency.

Mt. Marapi’s alert level has been maintained at waspada or caution (level 2). The PVMBG has said it is not safe to be within 3 kilometers of the activity.

Increased volcanic activity was noted on Aug. 3, 2011 with an eruption and a volcanic ash cloud that covered several areas, including Agam, Padang Panjang, Padang Pariaman and Tanah Datar.

Mt. Marapi, which is located near to the twin volcanos of Mt.Singgalang and Mt. Tandikek, is a popular climbing destination, particularity during December as scores of climbers flock to its accessible peak to see in the New Year.

Marapi Wildlife Reserve is an administrative area around the volcano that is managed by the West Sumatra administration for the purposes of conservation in the province.(ebf)
Frutseldinsdag 17 december 2013 @ 14:28
Turbomuisdinsdag 17 december 2013 @ 18:28
De Indonesische vulkanologische dienst (VSI) meldt, dat de seismische activiteit van de Sinabung in de afgelopen dagen aanzienlijk berhoogd is. Aan de oppervlakte is de vulkaan relatief rustig. Uit de krater is enkel een gaspluim met enige asdeeltjes waarneembaar. De aardbevingen suggeren, dat nieuwe magma aan het stijgen is en mogelijk (grote) explosies kan veroorzaken. De bevingen met een lage frequentie, de zogenaamde hybride aardbevingen, zijn karakteristiek voor beweging van vloeistof binnen de vulkaan. Het aantal van deze bevingen is gestegen naar 1000 per dag. Tevens zijn er aanhoudende vulkanische trillingen (interne vibratie) op de middenniveaus geregistreerd. Deformatie metingen met tilt-meters op de noordelijke en oostelijke flanken en EDM (elektronische afstand meters) laten een fluctuerende trend van inflatie zien. Dit houdt in, dat er een massa magma zich binnendringt op geringe diepte. De gevarenzone is uitgebreid naar een radius van 5 km. De vulkaan blijft op het hoogste alertheidsniveau. De luchtvaartcode blijft eveneens rood.

147458.jpg
mouzzerzondag 29 december 2013 @ 22:41
Eruptie San Miguel vulkaan, El Salvador

Bcroey-CQAAhvZ1.jpg

http://www.wired.com/wire(...)ion-from-san-miguel/
bwtmaandag 30 december 2013 @ 07:59
En een website met de totaal foute titel van het jaar:
http://www.wunderground.c(...)no-eruption-20131228
De titel heeft het over El Hierro. Maar het gaat over de uitbarsting van El Salvador.
Ze hebben er wel erg veel mooie plaatjes bij van andere vulkaan uitbarstingen. Dat dan weer wel.
Frutselmaandag 30 december 2013 @ 09:38
CjBz3gS.jpg

El Salvador idd
bwtmaandag 30 december 2013 @ 14:16
eruptionsblog twitterde op zondag 29-12-2013 om 23:19:54 Looks like the opening salvo of the San Miguel eruption was captured on video. via @chematierra and @tcsnoticias http://t.co/YKE8R0nfLR reageer retweet
Video is helaas door de gebruiker offline gehaald

rudigerescobar twitterde op maandag 30-12-2013 om 03:35:50 @eruptionsblog here are the seismic records from today´s activity at San Miguel: http://t.co/fjZLk6lKCY reageer retweet
eruptionsblog twitterde op zondag 29-12-2013 om 22:56:12 San Miguel post updated again with OMI sulfur dioxide imagery and a link to a GOES animated GIF of the plume: http://t.co/KkLDtRmC27 reageer retweet
ejhughes1 twitterde op zondag 29-12-2013 om 22:38:57 @eruptionsblog View of San Miguel SO2 http://t.co/MbxCWwaPcm and Ash http://t.co/Xn15NSiLFm from Aura/OMI reageer retweet
Perrinzondag 5 januari 2014 @ 08:32
quote:
Paniek na hevige uitbarsting vulkaan Sinabung

Omwonenden van de zeer actieve Indonesische vulkaan Sinabung zijn zondag gevlucht nadat de berg nog heviger was uitgebarsten dan de afgelopen dagen. Zaterdag waren er liefst 50 erupties, maar zondag spuwde de berg zijn aswolken nog verder dan verwacht, meldden Indonesische media. .

Op motoren en in vrachtwagens sloegen de bewoners van de omliggende dorpen in paniek op de vlucht. De veiligheidszone rond de vulkaan op het eiland Sumatra is inmiddels 7 kilometer. De dorpen daarbinnen zijn bedekt met grijze as. De 2460 meter hoge vulkaan slingert as, puin en stenen de lucht in die in de verre omtrek neerkomen. Sinds november zijn al meer dan 20.000 omwonenden gevacueerd.
Frutselzondag 5 januari 2014 @ 12:15
:o

quote:
0s.gif Op zondag 5 januari 2014 08:32 schreef Perrin het volgende:

[..]

Mag je hier wel ff in zetten als je wilt Perrin
WKN / Indonesische vulkaan Sinabung barst in korte tijd negen keer uit
Perrinzondag 5 januari 2014 @ 13:28
quote:
14s.gif Op zondag 5 januari 2014 12:15 schreef Frutsel het volgende:
:o

[..]

Mag je hier wel ff in zetten als je wilt Perrin
WKN / Indonesische vulkaan Sinabung barst in korte tijd negen keer uit
Ah, dat topic had ik gemist. Is dus al maanden bezig, die uitbarsting :{
Frutseldonderdag 9 januari 2014 @ 08:38
quote:
Ash explosions at Mt. Marapi on Sumatra

Bukittinggi, West Sumatra (ANTARA News) - Mount Marapi in West Sumatra expelled thin grey smoke up to 200 meters from the crater into the sky, on Wednesday morning, stated spokesman of the Bukittinggi Volcanology and Geological Disaster Mitigation Agency (PVBMG) Warseno.

"The volcano spewed smoke after it showed signs of increased activity at 7.28 a.m. local time on Wednesday. Local residents should therefore, continue to stay alert," he warned.

The volcano, located in the Tanahdatar and Agam districts, West Sumatra, remains on the second highest alert level.

People living within 3-km radius of the crater are banned from climbing the volcano.

Mt Marapi is one of the active volcanoes in West Sumatra. It had sent out sulfuric volcanic ash, one thousand meters into the sky, on August 3, 2011. The ash had fallen over several areas, such as Agam, Tanahdatar, Padangpariaman and Padangpanjang.

The volcano is also considered a conservation area as well as a tourist destination in West Sumatra.

When inactive, the mountains adjacent to Mount Singgalang and Mount Tandikek have always been a destination for climbers from within and outside West Sumatra. During every New Year, it is gets crowded with trekkers.
Frutseldonderdag 9 januari 2014 @ 08:39
quote:
North Sumatra’s Mount Toba may erupt again, at any time

Geologists and geophysicists say that Mount Toba, which erupted thousands of years ago, turning into Lake Toba, still contains a dangerous magma chamber and its activity needs further study.

Indonesia Geological Experts Association president Rovicky Dwi Putrohari said the magma chamber could be observed in a study conducted by researchers recently. Rovicky added that researchers used the tomography method to detect the magma chamber.

Researchers said the Mount Toba magma chamber was located at a depth of between 20 kilometers and 100 kilometers.

“The method was used in the early stage of the study. Our researchers were able to find the location and dimensions of the magma chamber of Mount Toba. Later research will find out the potential volume of magma in the volcano for triggering an eruption,” Rovicky told The Jakarta Post on the sidelines of a joint conference between the Indonesian Geological Experts Association and Indonesian Geophysics Experts Association in Medan, North Sumatra, recently.

Around 800 geologists and geophysicists took part in the conference, including scientists from Australia, France, Malaysia, Singapore and the United States.

Rovicky said that during the three-day conference several studies related to the Mount Toba eruption were presented by experts, including Craig A. Chesner, from the Eastern Illinois University in the US.

Rovicky explained that based on Chesner’s study in 2011, it was concluded that the current Lake Toba was the result of four previous eruptions.

The first eruption took place around 1.2 million years ago at the northwest end of Lake Toba, the second was around 840,000 years ago south of Lake Toba, encompassing Parapat and Porsea, the third eruption occurred around 500,000 years ago at the northern end of the lake between Silalahi and Haranggaol, and the fourth eruption occurred some 74,000 years ago which resulted in the present state of Lake Toba, with Samosir Island in the middle. Its depth is estimated at 500 meters.

Rovicky said Mount Toba was regarded as a super volcano as it had a huge magma chamber, which, if it erupted, would leave a massive caldera, like Lake Toba today.

Rovicky added that the magma chamber inside the volcano could erupt any time if the Sumatra fault line reactivated.

The Sumatra fault line bisects Sumatra Island from the northwest in Aceh to the south in Lampung. The fault line runs through Mount Toba.

“A quake could reactivate the magma chamber which is so far dormant. That’s why we believe Mount Toba could erupt again at any time. When it will be, we don’t know. Thorough and continuous research is needed to find that out,” said Rovicky.

Andi M. Adiwinata, from the Indonesian Geophysics Experts Association, said the scientist who detected the presence of the magma chamber in Mount Toba was Sri Widyantoro, from the Bandung Institute of Technology. Andi added that the detection was carried out using the tomographic technique.

Andi said Mount Toba had currently attracted the attention of local as well as foreign researchers thanks to its massive and devastating eruptions in history. He said a joint team of Indonesian scientists had been formed from relevant institutions, including the Indonesian Institute of Sciences (LIPI) and the Meteorology, Geophysical and Climatology Agency (BMKG), to conduct mitigation studies regarding the latest condition of Mount Toba.

“The researchers are currently working to find out how big the potential threat from Mount Toba is. Despite being categorized as inactive, its development needs further monitoring,” said Andi, adding that besides Mount Toba, 129 active volcanoes in Indonesia were also being monitored.
Frutseldinsdag 14 januari 2014 @ 12:01
Enige activiteit bij de ASO in Japan

Frutselvrijdag 31 januari 2014 @ 10:01
quote:
Shishaldin Volcano's Alert Status Upgraded After Unusual Activity

The Alaska Volcano Observatory upgraded the alert level at Shishaldin Volcano in the Aleutian Islands Thursday after seeing some unrest at the summit.

AVO scientist Kristi Wallace says the unusual activity at Shishaldin began Wednesday.

"Little bit ago, AVO changed the color code at Shishaldin from green to yellow based on increased temperatures at the summit crater of Shishaldin Volcano as well as increased steaming yesterday," she says. "Both of those observations were observed via satellite imagery.

Wallace says the observations don’t mean Shishaldin is in imminent danger of eruption. The yellow status just indicates behavior that isn’t normal.

Shishaldin is the highest peak in the Aleutians, rising about 9,400 feet above sea level. It’s located on Unimak Island about 100 miles northeast of Unalaska.

Shishaldin was last elevated to yellow in 2009, when the same kind of activity occurred. Wallace says that anomaly didn’t result in anything more serious.

Historically, though, Shishaldin has been very active:

"It’s erupted approximately 28 times since 1775, so in historic times it’s erupted quite frequently, although the eruptions are typically low-level plumes and ash and steam plumes," Wallace says. "So [it's] not a particularly dangerous volcano, although the eruption that occurred in 1999 did send ash plumes as high as 45,000 feet above sea level."

Wallace says the AVO is going to keep monitoring Shishaldin for signs of explosions. But the seismic stations closest to the summit aren’t working right now. That means using more distant monitoring points as their main sources of data.

"There’s a whole network of stations, so we’re just relying on other stations that are not quite as close to the summit area where we’re seeing the activity," Wallace says. "Hopefully those will be enough for us to pick up a seismic signal, although this volcano’s not just monitored with a seismic network. We’re still using satellite imagery, and then the infrasound stations which are good at detecting explosion signals."

There are two other volcanoes in the Aleutians currently on a yellow alert. Those are Cleveland, 175 miles southwest of Unalaska, and Veniaminof, northeast of King Cove.
stan12donderdag 13 februari 2014 @ 19:55
Een uitbarsting van de vulkaan Kelud op het Indonesische eiland Java heeft donderdag duizenden mensen op de vlucht doen slaan.
Foto: AFP

De vulkaan spuwt as en gesteente tot een hoogte van drie kilometer de lucht in, meldden de hulpdiensten in het land.

De uitbarsting begon 's middags. Met hulp van de autoriteiten of op eigen houtje maakten inwoners uit de omgeving zich zo snel mogelijk uit de voeten. De overheid heeft mensen in een straal van 10 kilometer van de vulkaan dringend aangeraden het gebied te verlaten. Voor zover bekend zijn er geen slachtoffers te betreuren.

http://www.nu.nl/buitenla(...)luchten-vulkaan.html
Frutselvrijdag 14 februari 2014 @ 08:40
quote:
0s.gif Op donderdag 13 februari 2014 19:55 schreef stan12 het volgende:

Thx! Effe eigen topic aangemaakt
WKN / Duizenden Javanen op de vlucht voor vulkaan Kelud, luchthavens dicht
Frutselmaandag 31 maart 2014 @ 21:13
quote:
Remote Alaska volcano might erupt soon, experts say

Alaska's Cleveland Volcano could soon be leaking from its flanks if the lava inside continues to build up, officials at the Alaska Volcano Observatory reported.

The observatory reported that the volcano's lava dome was 262 feet in diameter on August 30 and has now expanded to 394 feet.

"The presence of the lava dome increases the possibility of an explosive eruption, but does not necessarily indicate that one will occur," the observatory said. "Short-lived explosions could produce an ash cloud that exceeds 20,000 ft above sea level."

The observatory said it did not expect air travel problems if the volcano erupted.

Because "the small lava dome in the summit crater has resumed growth and now fills the floor of the crater," the observatory is raising its alert level.

The remote volcano is in the Aleutian Islands, about 940 miles southwest of Anchorage.

Because the volcano is in such a remote area, the observatory webcam feed has experienced technical difficulties.
Frutselmaandag 7 april 2014 @ 12:08
Ook even hier omdat hij zo mooi is... O+

Ecuador
7nHAanp.jpg

zie ook:
WKN / Uitbarsting vulkaan Tungurahua in Ecuador
Frutseldonderdag 1 mei 2014 @ 13:53
quote:
Magma rising in Washington state's Mount St. Helens volcano

(Reuters) - Magma levels are slowly rebuilding inside Mount St. Helens, a volcano in Washington state that erupted in 1980 and killed 57 people, although there was no sign of an impending eruption, U.S. scientists said.

The roughly 8,300-foot volcano erupted in an explosion of hot ash and gas on May 18, 1980, spewing debris over some 230 square miles and causing more than a billion dollars in property damage. Entire forests were crushed and river systems altered in the blast, which began with a 5.2 magnitude earthquake.

"The magma reservoir beneath Mount St. Helens has been slowly re-pressurizing since 2008," the U.S. Geological Survey said in a statement on Wednesday. "It is likely that re-pressurization is caused by (the) arrival of a small amount of additional magma 4 to 8 km (2.5 to 5 miles) beneath the surface."

The USGS said this is to be expected with an active volcano and does not indicate "the volcano is likely to erupt anytime soon."

The USGS, and the Pacific Northwest Seismic Network at University of Washington, closely monitor ground deformation and seismicity at the volcano. This summer, they will also measure its released gases and gravity field, measurements that can be used to monitor subsurface magma and forecast eruptions.
bwtdonderdag 1 mei 2014 @ 17:14
eruptionsblog twitterde op donderdag 01-05-2014 om 16:46:51 Brief updates today for activity at Mount St. Helens and a possible submarine eruption at Ahyi in the Marianas: http://t.co/ONotMIXbdJ reageer retweet
Alleen heeft wired een mogelijk probleem waardoor je een foutmelding pagina krijgt/kunt krijgen.
#ANONIEMdinsdag 13 mei 2014 @ 16:55
Kirisima Japan

1399992288682_zpshgfkixgy.jpg
Frutseldonderdag 22 mei 2014 @ 13:33
quote:
Evacuations near volcano in El Salvador
At least 1,000 people living near the Chaparrastique volcano have been evacuated as a precautionary measure after seismic activity increased at the volcano, Salvadoran civil protection authorities said Monday.

There was an explosion early Monday and the volcano then spewed reddish ash, officials said.

The Civil Protection Department said in a statement that an alert had been declared for the municipality of San Miguel, where the volcano is located. The city of San Miguel itself is 50 kilometres from the volcano. It is one of the largest cities in the Central American country.

The 2,129-metre volcano is about 145 kilometres east of San Salvador, the capital of El Salvador.

The volcano's last significant eruption was in 1976.
Pregodonderdag 22 mei 2014 @ 14:07
quote:
0s.gif Op dinsdag 13 mei 2014 16:55 schreef aloa het volgende:
Kirisima Japan

[ afbeelding ]
prachtige foto ^O^
Treehut362donderdag 29 mei 2014 @ 11:53
De Bromo is de bekendste vulkaan op het eiland Java, Indonesi.
65b9n7.jpg
Frutseldonderdag 29 mei 2014 @ 12:11
quote:
19s.gif Op donderdag 29 mei 2014 11:53 schreef Treehut362 het volgende:
De Bromo is de bekendste vulkaan op het eiland Java, Indonesi.
[ afbeelding ]
Ik dacht de Merapi?
Treehut362donderdag 29 mei 2014 @ 12:14
quote:
1s.gif Op donderdag 29 mei 2014 12:11 schreef Frutsel het volgende:

[..]

Ik dacht de Merapi?
mijn vader is er geweest
Frutseldonderdag 29 mei 2014 @ 12:20
quote:
19s.gif Op donderdag 29 mei 2014 12:14 schreef Treehut362 het volgende:

[..]

mijn vader is er geweest
En dat maakt het de bekendste? :p
Treehut362donderdag 29 mei 2014 @ 12:21
quote:
1s.gif Op donderdag 29 mei 2014 12:20 schreef Frutsel het volgende:

[..]

En dat maakt het de bekendste? :p
voor mij wel, trouwens ik heb het van Wikipedia
bwtvrijdag 30 mei 2014 @ 16:18
eruptionsblog twitterde op vrijdag 30-05-2014 om 14:35:08 Explosive eruption today at Indonesias Sangeang Api, with a plume that might be 20 km tall (or more): http://t.co/aj86AKZNlR reageer retweet
10417109_888984037794240_255306256_n.jpg
DemonRagevrijdag 30 mei 2014 @ 18:03
quote:
0s.gif Op vrijdag 30 mei 2014 16:18 schreef bwt het volgende:
eruptionsblog twitterde op vrijdag 30-05-2014 om 14:35:08 Explosive eruption today at Indonesias Sangeang Api, with a plume that might be 20 km tall (or more): http://t.co/aj86AKZNlR reageer retweet
[ afbeelding ]
Flinke pluim. :o
bwtzaterdag 31 mei 2014 @ 12:40
teideano twitterde op vrijdag 30-05-2014 om 19:31:49 La erupcin de Sangeang vista desde el mar. Impresionante columna eruptiva. http://t.co/0Ec7lq7nvg reageer retweet
Bo5ov-pIIAA1oQF.jpg

ObservingSpace twitterde op zaterdag 31-05-2014 om 02:08:34 MT @teideano The view of the #Sangeang eruption from the sea. Impressive #eruption column. #volcano #indonesia http://t.co/tOAgXIdjXy reageer retweet
Bo6p1JQCIAEwTff.jpg

eruptionsblog twitterde op zaterdag 31-05-2014 om 05:14:00 I apologize for the Daily Mail link, but the images of the Sangeang Api eruption are great.http://t.co/qgqg90WiPk http://t.co/75BhP36Oly reageer retweet
Bo86078CcAAOTS0.png


[ Bericht 14% gewijzigd door bwt op 31-05-2014 12:58:51 ]
Ener-Gzaterdag 31 mei 2014 @ 19:01
https://twitter.com/WXRonaldo/status/472778804885475329/photo/1
bwtzaterdag 31 mei 2014 @ 20:24
RT_com twitterde op zaterdag 31-05-2014 om 17:30:46 Indonesia volcano ash cloud stops all air services to Darwin & Bali, grounds Australia flights http://t.co/cYAn7pBzSW http://t.co/OLGkcs09Fn reageer retweet
Matthew__Watson twitterde op zaterdag 31-05-2014 om 19:29:27 Breathtaking..."@Bromotengger: Stunning pic of the the #eruption of the #SangeangApi #volcano in #Indonesia http://t.co/5tNOG5L7ZL” reageer retweet
bwtdinsdag 3 juni 2014 @ 16:16
indonesia_tmo_2014151.jpg
Van Nasa Earth Observatory website

En :
Sangeang5-31.jpg

van Eruptions blogger - prof. Erik Klemetti
Plaatje laat zien dat de as wolk tot in australie komt. (en dat was een paar dagen terug)
Frutselwoensdag 4 juni 2014 @ 23:02
0acd1949-6f93-4c44-a881-4fe55a23bd9.jpg


quote:
Alaska Pavlof Volcano Erupts: Alert Level At Orange

The Alaska Volcano Observatory (AVO) issued a red alert warning this week when the Pavlof Volcano shifted into an intense eruption, sending ash 22,000 feet into the air.

Pavlof is located in an uninhabited region of the Alaska Peninsula, 625 miles southwest of Anchorage.

This is the state's first red alert since 2009, Reuters reports, when Mount Redoubt sent ash flying 50,000 feet into the air, disrupting air traffic.

This week's eruption didn't aggravate airline activity.

Pavlof's alert level was slightly lowered to Orange by late Tuesday because seismic tremors had decreased for the past 12 hours, but scientists are still watching the volcano closely.

"It can erupt for weeks or months," observatory research geologist Michelle Coombs told Reuters.

The event over the weekend was unusual because scientists did not initially detect elevated seismicity below the mountain. Instead, scientists using satellite signals detected elevated surface temperatures late Friday afternoon.

A lava flow began from a vent on the north side of the mountain a few hundred meters from the peak, and scientists began to see plumes heading to the east and northeast at 9,000 to 10,000 feet.

Around 3 p.m. Monday, there was a considerable uptick in seismicity, according to Game McGimsey, a volcanologist at the observatory, prompting the red warning alert.
Frutseldinsdag 24 juni 2014 @ 14:49
NtPJBn7.jpg

quote:
Volcanoes are waking up in the Aleutians
Sharply increased seismic activity and volcanic eruptions in the Aleutian Islands and the far western Brooks Range are being investigated by scientists.

The Alaska Volcano Observatory says the activity over the past few months is the most seen by the station 26 years.

On the Alaska Volcano Observatory website three volcanoes are classified with a yellow alert level—signifying signs of elevated unrest above known background levels—and three are at an orange alert level—heightened unrest with increased likelihood of eruption.

Orange is the second-highest alert level after red signifying an eruption that is imminent or underway.

Pavlof Volcano released an ash plum in May that diverted aircraft. The 8,262-foot (2,518-meter) tall volcano erupted sending ash plumes as high as 30,000 feet (9,144 meters). Aircraft were advised to avoid the area since ash could damage airplane engines.

With heightened activity from all volcanoes, scientists still don't have enough information to point to any larger trend or activity.

"At this point, you know, we have to say it’s coincidental," he said in an interview with radio station KTOO News.

"It could be that there is a larger process at work, but we’re not able to say what that is at this point in time, or if there is such a process. You know, perhaps the answer is we haven’t been looking long enough to know."


The government agency posted news updates on its Facebook page today showing elevated surface temperatures at the summit of Shishaldin Volcano.
Gisteren die 8.0 aardbeving in dezelfde regio... "a larger process at work" ?
bwtmaandag 30 juni 2014 @ 16:22
Sinabung is weer onrustig:
teideano twitterde op maandag 30-06-2014 om 14:24:09 Sinabung erupts again un Indonesia, prompting massive evacuations. #volcano #science #nature http://t.co/YqgYoiMTl7 reageer retweet
BrYLnuaIIAAXMzv.jpg
El_Matadordinsdag 1 juli 2014 @ 23:35
Niet al te ver van huis:

image.jpg

http://www.elcolombiano.c(...)_nevado_del_ruiz.asp

descarga_217.jpg

image.jpg
GekkePoeswoensdag 2 juli 2014 @ 01:42
bwtvrijdag 4 juli 2014 @ 14:00
BrsjgHfCcAITWgt.jpg
bwtmaandag 21 juli 2014 @ 15:21
En het is drukker op La Reunion
Piton de la Fournaise volcano erupted
Ivm slecht weer zijn de beelden van de webcams niet 100%
quote:
- It is currently bad weather at the summit of the volcano. During better weather you can see a number of live webcam images here
The eruption is not spectacular but shows 2 craters in eruption + a number of lava streams slowly finding their way (to the ocean?). They appear not to be powerful enough to reach the ocean. Neither can lava tubes be seen. The volcano has a lot of lava tubes and eruptions regularly reach the ocean (Hawaii type of eruptions).
The volcano was set to a higher alert on June 12 after seismicity started to increase. People were had to stay on prepared trails. Good work from the volcanologists!
Frutseldinsdag 22 juli 2014 @ 12:31
quote:
San Cristobal (El Salvador) unleashes steam and ash
At about 1:50 pm the San Cristobal volcano, located in the department of Chinandega reported an explosion, according to El Nuevo Diario reported Maj. Carlos Caceres Mendoza, departmental head of the Civil Defense in this department, where also several people managed see a column of smoke between 80 to 100 meters, throwing colossus material between ash and sand.

Neighbors sector of the region "The Greece 1, 2 and 3" were observed ash and fine sand that fell on the road, thrown by the volcano as well as residents of the estates "La Roja", "Flags", near to San Cristobal.

In this situation, the Civil Defense Chinandega is under continuous observation of the volcano who informed that this is a gasification process of the Colossus and watch him be for any damage that may be caused in the regions close to San Cristobal.
teideano twitterde op dinsdag 22-07-2014 om 12:07:59 Extreme vibration at San Miguel #volcano in El Salvador. Increble el estado ssmico del #volcn San Miguel. #science http://t.co/n624Sybi8k reageer retweet
bwtzaterdag 16 augustus 2014 @ 17:45
eruptionsblog twitterde op zaterdag 16-08-2014 om 14:06:06 As reported by a number of people, Brdarbunga in Iceland is up to something - intrusion? Headed to eruption? http://t.co/MpfDZdf7WV reageer retweet
eruptionsblog twitterde op zaterdag 16-08-2014 om 14:06:39 I have no idea but well worth watching. reageer retweet
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Frutselzondag 17 augustus 2014 @ 15:02
IJslandse vulkanen staan ook hier:

WKN / [ACTUEEL] Vulkanen IJsland #18: Verhoogde activiteit bij Katla
bwtdinsdag 19 augustus 2014 @ 16:34
AFP twitterde op dinsdag 19-08-2014 om 15:28:02 Japan volcanic isle may collapse, create tsunami http://t.co/8q3H6VBpxE http://t.co/V8z8P4PLUG reageer retweet
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(googlemaps)
Gaat om een groeiende vulkaan die dagelijks veel lava en as uitstoot.
Dit is inmiddels dusdanig gegroeit dat een deel in elkaar kan storten met al dan niet een tsunami tot gevolg.
Frutselvrijdag 29 augustus 2014 @ 09:07
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Tavurvur volcano (Rabaul, Papua New Guinea): large explosive eruption, ash to 60,000 ft

A large explosive eruption began at Tavurvur volcano (Rabaul caldera) this morning.
The eruption seems to be similar to a paroxysm on Etna.
Lava fountains and significant ash emissions were observed. The ash plume reached a height of approx. 60,000 ft (18 km) altitude. Aviation color code was raised to red.
Frutselvrijdag 29 augustus 2014 @ 09:09
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#ANONIEMvrijdag 29 augustus 2014 @ 09:17
New Guinea.


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Jumparoundvrijdag 29 augustus 2014 @ 11:44
quote:
0s.gif Op vrijdag 29 augustus 2014 09:17 schreef aloa het volgende:
New Guinea.


[ afbeelding ]
de plaat is echt vet!
Frutselvrijdag 29 augustus 2014 @ 13:47
rubbereendvrijdag 29 augustus 2014 @ 16:24
wow
#ANONIEMzaterdag 30 augustus 2014 @ 12:19
New Guineau..
Vulkaan spuwt tot 18 km hoogte as de lucht in.


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[ Bericht 11% gewijzigd door #ANONIEM op 30-08-2014 12:23:30 ]
Frutselmaandag 1 september 2014 @ 15:08
Never Mind Iceland — This Erupting Volcano Is the Real Threat

http://mashable.com/2014/(...)guinea-mount-rabaul/

#ANONIEMmaandag 1 september 2014 @ 19:07
#Pyroclastic #flows at #Tungurahua #volcano #Ecuador. The activity remains high http://t.co/O9XDqxMjyk

IMG_20140901_190335_zpsuycvmusu.jpg
Pregomaandag 1 september 2014 @ 19:51
Schitterende foto's ^O^
#ANONIEMdinsdag 2 september 2014 @ 11:57
Tavurvur Volcano, East New Britain - PNG:
Frutseldinsdag 2 september 2014 @ 15:42
quote:
Lava Continues to Flow from Volcano Kilauea

Islands, is oozing out lava. But Big Island Civil Defense officials who flew over the lava flow on Monday stated that there is no immediate threat.

"It's very slow. The surface flow, whenever it's on the surface, has been very, very slow moving and that's why we're saying it's not posing any imminent threat", affirmed Darryl Oliveira, Big Island Civil Defense director.

Till now, the lava is not moving through rapidly and also, it is not a stream of lava. Lava is around 1.2 miles from the eastern boundary of the Wao Kele O Puna forest reserve. For now, people residing nearby have not been asked to evacuate their respective places.

Right now, the situation is under control. And, even if there will be a need to evacuate the region, residents will be having sufficient time to do the same.

In 1983, Kilauea erupted for the first time. Since then, continuous eruptions have been taking place. Experts shared that main concern is since its first eruption, new openings have been forming. On June 27, a new vent was formed and through these vents, lava reaches the surface.

Authorities concerned said that people around the area are regularly updated about the situation. They are well aware that the current situation will not affect their homes. Scientists have been keeping a check on the vent, as it can prove problematic in the coming time.

Researchers have not been able to come to know the exact path of the lava flow. As per scientists, changes in the amount of flow have been acting as hurdle to know the detailed path.

Hawaii County officials made an announcement that this week two community meetings will be held. In these meetings, the latest updates on lava flow threatening residential areas will be discussed. One of the meetings will be on September 2 and another will be on September 4 from 6.30 to 8pm in Pahoa High School cafeteria.
quote:
Kilauea lava flow could potentially threaten homes

Scientists at the USGS Hawaiian Volcano Observatory are closely monitoring an active lava flow that, if it continues to advance, could threaten residential areas or infrastructure in the coming weeks to months.

The June 27th lava flow, named for the date it began erupting, is advancing to the northeast of its vent on the flank of Pu’u ‘Ō’ō on Kīlauea Volcano’s East Rift Zone.

As of Friday, August 22, the front of the flow was 10.7 km (6.6 mi) northeast of the vent. At this point, scientists say it is not an immediate threat.

HVO scientists, who mapped the flow during an overflight Friday morning, report that the flow was active along two fronts. The northern branch was advancing northeastward across fairly flat land, while the southern branch had flowed into a ground crack within the rift zone. By tracing the steam issuing from the crack, lava is inferred to have advanced 1.4 km (0.9 mi) over the past four days, putting it 3.8 km (2.4 mi) from the eastern boundary of the Wao Kele o Puna Forest Reserve.

The difficulty in forecasting the flow’s exact path is that “downhill of the flow” can be affected by subtle variations in topography, changes in lava supply and where and how lava enters or exits ground cracks along the rift zone.

The June 27th lava flow is advancing through a heavily forested area on Kīlauea’s East Rift Zone. This area of the rift zone is exceedingly hazardous to hikers as it is highly fractured, with numerous, deep ground cracks that are difficult to see because of the heavy vegetation. Another hazard in the area includes methane explosions that occur when lava flows over vegetated land.

The June 27th lava flow is currently within the Kahaualea Natural Area Reserve, which has been closed by the Hawaii State Department of Natural Land and Resources due to the ongoing volcanic hazards, and the Wao Kele o Puna Forest Reserve, also closed by DLNR and the Office of Hawaiian Affairs.

HVO continues to closely monitor the June 27th lava flow through increased overflights, satellite imagery, and webcam images, and is keeping Hawaii County Civil Defense fully informed about the flow’s location.
Frutseldinsdag 2 september 2014 @ 16:29
quote:
Seismologists in Ecuador say the Tungurahua volcano is showing increased activity.

About 40 explosions were registered on Monday and even though their intensity diminished, experts have not ruled out a renewed sudden increase.

An ash cloud up to 3km (1.8 miles) in height has been rising from the volcano over the past few days.

Tungurahua, which had been dormant until 1999, lies 135km (85 miles) south-east of the capital, Quito.

Despite the increase in seismic activity, children in the area returned to class on Monday, the start of a new school year.

Resident Antonio Chango told Ecuador's El Comercio newspaper that "our children's studies can not stop just because of the volcano".

"We're fine and keen to start the school year," one young pupil told the paper.

The 5,023m-high Tungurahua, meaning "throat of fire" in the indigenous Quechua language, is one of South America's most active volcanoes.
bedachtzaamzaterdag 6 september 2014 @ 02:13
https://www.facebook.com/(...)26513&type=2&theater

Boem :o
bwtzaterdag 6 september 2014 @ 09:54
Oeps, verkeerde topic
#ANONIEMzaterdag 6 september 2014 @ 17:58
Papua New Guinea's Tavurvur Volcano Eruption:
Frutseldonderdag 9 oktober 2014 @ 10:26
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quote:
Dark giant ash clouds rise from the crater of Mount Sinabung volcano during an eruption on October 8, 2014, as seen from Karo district located on Indonesia's Sumatra island, following an earlier eruption on October 5, 2014.According to authorities hundreds of residents are still housed at evacuation centers as authorities maintains off limit danger zone around Mount Sinabung located in Indonesia's Sumatra island following deadly eruption in early February that killed about 17 people.
Bron
Frutseldonderdag 23 oktober 2014 @ 10:07
quote:
Colombian earthquake spark tenstions about possible imminent eruptions?
Authorities in southwestern Colombia have raised alert levels on Tuesday after a 5.6 magnitude earthquake hit the border region, sparking concerns that two nearby volcanoes might erupt in a matter of days. Colombia’s Geological Service have changed the alert level of two volcanoes from yellow to orange. The two volcanoes are Cerro Negro de Mayasquer and Chiles, both active on Colombia’s southern border to Ecuador. The orange alert level is defined by the Geological Service as “probable eruption in term of days to weeks.” The earthquake that hit the border region causes a scare on both side of the border.

Officials in the Colombian town of Cumbal, near the quake’s epicenter, were quoted as saying by The Associated Press that they formed an emergency committee to survey possible damage. But so far, there were no reports of injuries in the town of 36,000 residents, the majority of them members of an indigenous tribe. “It was really strong, every house” felt it, Jose Diomedes Juezpesan, the town’s top official, told AP. If the volcanoes are to erupt, it will mostly affect the state Nario. Local state governments have started to take security measures in order prevent tragedies. Nario government officials have recommended suspending school classes, delivered a special communication system to indigenous communities in the area and offered the indigenous communities tents if the evacuate their premise while the volcanoes are on high alert. Neither one of the volcanoes have erupted in the past 160,000 years.
quote:
Alertlevel raised at Cerro Negro
Cerro Negro de Mayasquer volcano (Colombia): magnitude 5.8 earthquake, alert level raised

Orange alert has been declared for the volcanic complex at the Colombia-Ecuador border, after a magnitude 5.8 earthquake occurred under the volcano last Monday.
This earthquake, located at shallow 10 km depth southwest of the Chiles cone, seems to be directly linked to the ongoing crisis at the volcano. The volcano has recently been showing increased signs of volcanic unrest and inflation. This could be the sign of magma rising with the volcano and result in an eruption, although it is not possible to quantify how likely this might be.

Since a seismic network had been installed in early 2013, the volcano has had two impressive peaks of earthquakes, the first one occurring between Sep 2013 and Jan 2014 with over 100,000 small events detected. A second peak with 25,000 quakes occurred between late April and July this year, when the alert level was first raised to yellow.
A new seismic swarm has started on 29 September and until now counts nearly 40,000 quakes. In addition, a slow inflation (swelling of the mountain) located southwest of the cone Chiles has been detected by scientists.
Some of the seismic activity has the characteristics believed to represent fluid (gasses, water, magma) movements at depth, although most earthquakes are related to small rock fracturing events (which could be purely tectonic in nature and not necessarily related to magma).
The volcano has only a short history of monitoring and not have any known eruption in the past 10,000 years. This makes it extremely difficult to asses how likely it is that it awakes in a near to medium future. However, Colombian and Ecuadorian scientists take the situation very seriously and have started to prepare hazard maps for various kind of possible eruption scenarios.
A special bulletin of IGEPN also states that the recorded deformation has increased in recent days. This bulletin concluded that the observed monitoring parameters are compatible with the scenario of a magma intrusion that could lead to a sudden, potentially large, phreatic or even magmatic eruption, even on a short timescale (weeks).
Whether an eruption will actually occur or not is impossible to predict.
Frutseldonderdag 23 oktober 2014 @ 10:10
quote:
Update : Although we mentioned earlier that this earthquake was not linked to volcanic activity, the Carchi authorities have now confirmed that the earthquake was volcanically triggered.
Zie ook:
Earthquake shakes Colombia - Ecuador border
El_Matadordonderdag 23 oktober 2014 @ 11:06
Interessant Frutsel!

Je vroeg of ik er meer van weet. Globaal ja, in detail niet. Zie de vulkanen daar beschreven op Wikipedia.

En dit artikel zou je wat achtergrond kunnen geven:

http://nl.wikipedia.org/wiki/Geologie_van_Colombia
#ANONIEMzondag 26 oktober 2014 @ 21:09
Lavastroom bedreigt meerdere huizen op Hawa


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#ANONIEMdinsdag 28 oktober 2014 @ 14:57



[ Bericht 36% gewijzigd door #ANONIEM op 28-10-2014 15:08:18 ]
raistlin6vrijdag 31 oktober 2014 @ 00:01
https://twitter.com/TheTi(...)134622097408/photo/1

Turrialba vulkaan Costa Rica
bwtdinsdag 4 november 2014 @ 13:36
Hawaii lavastroom Mooie foto's
http://www.bostonglobe.co(...).html?p1=BP_Headline

En de lavastroom update van 3 november
http://www.bigislandvideo(...)update-monday-nov-3/

davidmpyle twitterde op dinsdag 04-11-2014 om 10:51:56 The #Kilauea lava flow has stalled on the edge of #Pahoa village, but lava breakouts are widening the flow front http://t.co/5v4bo76nv4 reageer retweet


[ Bericht 42% gewijzigd door bwt op 04-11-2014 14:07:24 ]
Frutseldinsdag 4 november 2014 @ 14:49
Zal me benieuwen of op de langere termijn dat dorpje gespaard blijft :Y
bwtdinsdag 4 november 2014 @ 16:45
En nog meer video's en foto's
http://www.hawaiinewsnow.(...)upslope-still-active
Lava front lijkt nog steeds stil te staan en break-outs stroom-opwaards
bwtwoensdag 5 november 2014 @ 10:01
Avond update
quote:
This afternoon’s assessment shows that the flow front remains active however has not advanced since Thursday. All activity along the front has been limited to breakouts along the margins or sides of the flow as well as on the flow surface. The front remains approximately 480 feet from the Pahoa Village Road. Additional breakouts upslope of the flow front are being monitored and those breakouts currently do not present with an immediate threat to area residents. The upslope breakouts are located approximately .7 to 1.5 mile above the ʻApaʻa Street area and along the north side of the flow and moving in a nor/northeast direction.
bwtdonderdag 6 november 2014 @ 11:41
Hawaii update:
quote:
The leading edge of the flow remains stalled and the overall level of activity was low. However, active breakouts persist in areas upslope of the leading edge and on flow margins. USGS also observed some new activity at Pu’u O’o, detailed below.
quote:
This morning’s assessment shows that the flow front remains stalled with very little activity and has not advanced over the past five days. The flow pad continues to show signs of inflation which could result in breakouts and more activity. The front remains approximately 480 feet from the Pahoa Village Road. The upslope breakouts remain approximately 0.7 to 1.50 miles above the Apa’a Street area and along the north side of the flow and moving in a north/northeast direction.
bwtvrijdag 7 november 2014 @ 16:50
Hawaii update:
lava front lijkt tot een halt te zijn gekomen
Alleen ver terug zijn er een paar uitbraken geweest.
Verder lijkt er geen "uplift" te zijn van de lava stroom.
bwtzaterdag 8 november 2014 @ 15:33
Lava blijt toch groeien in dikte.
kenhrubin twitterde op zaterdag 08-11-2014 om 06:32:43 #Kilauea lava flow continues to inflate (thicken) - see comparison or power pole base in image http://t.co/XIaBcplyOl http://t.co/yo6hv8OdqE reageer retweet
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bwtzondag 9 november 2014 @ 13:00
kenhrubin twitterde op zondag 09-11-2014 om 06:43:02 #Kilauea lava overflow of skylight near Puu Oo surrounded/trapped tripod of USGS monitoring camera, Nov. 7, HVO image http://t.co/IjtVSNDuyH reageer retweet
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bwtdinsdag 11 november 2014 @ 08:51
Argg, aanpassingen lopen weer fout......
bwtdinsdag 11 november 2014 @ 08:59
quote:
NEWS BRIEFS

The flow front remains stalled 480 feet from the Pahoa Village Road with very little activity and has not advanced.
A lava breakout in the area of Apa’a Street near the cemetery has entered a private property and is only 5 yards away from the garage area of a residential structure. Civil defense says it is possible that these buildings may be affected by the advancing flow later today.
1e huis is er aan.
eruptionsblog twitterde op dinsdag 11-11-2014 om 02:35:06 The Pahoa lava flow on Kilauea has taken its first house: http://t.co/PDk1LrXLb7 reageer retweet
bwtwoensdag 12 november 2014 @ 09:13
Meer nieuws
janinekrippner twitterde op woensdag 12-11-2014 om 11:54:59 Hawaii lava flow: Flow front stalled, breakouts monitored. Image: lava interacts with water http://t.co/0y4Z0CToSy http://t.co/QSCwREgJnB reageer retweet
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[ Bericht 52% gewijzigd door bwt op 12-11-2014 12:21:56 ]
#ANONIEMzaterdag 15 november 2014 @ 20:08
2014-11-14 lava flow activity:
bwtzondag 16 november 2014 @ 12:36
Waar ligt de lava en de uitbraken.
(klik voor de grote versie)
hawaii-1114usgsMAP.jpg
bwtmaandag 17 november 2014 @ 09:23


[ Bericht 100% gewijzigd door bwt op 17-11-2014 09:33:34 ]
Frutselmaandag 17 november 2014 @ 09:24
Er is ergens een Kilaluea (of hoe het ding ff heet :P) topic...
misschien kunnen we dat weer eens pimpen?
bwtmaandag 17 november 2014 @ 09:30
Is misschien wel een goed idee, een Hawaii topic
Ik heb altijd ruzie met de zoekfunctie van fok. Kan het dus niet vinden.
bwtmaandag 17 november 2014 @ 15:43
Meanwhile:
AGUvgp twitterde op maandag 17-11-2014 om 13:47:57 Chain linked fence actually resists Hawaiian lava flow: https://t.co/KLMakxE0q1 RT@TheEarthStory reageer retweet
Dat een simpel gaas hekwerk een lava stroom kan tegenhouden.
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Mooie foto - klik voor grote versie
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bwtdinsdag 18 november 2014 @ 09:44
quote:
NEWS BRIEFS

The flow field in Pahoa has gone quiet. Civil defense reports the nearest surface flow activity and surface breakouts are approximately 6 miles upslope of Apa’a Street, between the Pu’u O’o vent and the crack system.
Lava remains in the system, and so the evacuation advisory for those residents down slope of the flow will continue. Also, Pahoa Village Road between Apa’a Street and the Post Office Road will remain closed and limited to area residents only.


[ Bericht 100% gewijzigd door bwt op 18-11-2014 13:10:33 ]
bwtdinsdag 18 november 2014 @ 13:10
janinekrippner twitterde op dinsdag 18-11-2014 om 11:56:28 Hawaii lava flow update: breakouts 6 miles upslope from Apaʻa St disrupt lava supply http://t.co/yRcg671Fa3 http://t.co/5nEHBhlQbr reageer retweet
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CPPGeophysics twitterde op dinsdag 18-11-2014 om 16:39:05 Good news for Puna residents: HVO scientists note "marked decrease in the surface breakouts" during overflight http://t.co/YjRXINr4KH reageer retweet


[ Bericht 27% gewijzigd door bwt op 18-11-2014 16:57:27 ]
bwtwoensdag 19 november 2014 @ 11:35
hawaii-1117usgs05.jpg

quote:
NEWS BRIEFS

• No activity was observed downslope of the crack system, although “numerous surface breakouts and flows were noted in the areas from the vent to the crack system indicating lava remains in the system” reports civil defense. The nearest surface activity is 5 miles upslope of Apa’a Street.
• Scientists believe the decrease in flow front activity is the result of a lava supply disruption following a large breakout at Puʻu Kahaualeʻa near Puʻu ʻŌʻō, which began overnight on November 14–15.
• Emergency officials have not called it a day. The evacuation advisory for Pahoa residents down slope of the flow will continue. Also, Pahoa Village Road between Apa’a Street and the Post Office Road will remain closed and limited to area residents only.


[ Bericht 9% gewijzigd door bwt op 19-11-2014 16:33:39 ]
bwtvrijdag 21 november 2014 @ 14:18
kenhrubin twitterde op vrijdag 21-11-2014 om 10:04:24 #Kilauea lava flow front remains inactive but breakouts are occurring upslope 1.9km W of Kaohe Homesteads (HVO photo) http://t.co/gk1j8PQ46N reageer retweet
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Frutselmaandag 24 november 2014 @ 10:04
vulkaanuitbarsting op de Kaapverdische Eilanden

lGqFP7Z.jpg

quote:
Rare eruption of Pico do Fogo
A rare eruption of Cape Verde volcano Pico do Fogo, its biggest in decades, caused the closure of the airport and evacuation of local residents, officials told state radio on Sunday.

No damage or injuries were reported following Saturday's 8:00 pm (2100 GMT) blast but villagers at the bottom of the volcano on the Atlantic island nation were being evacuated over the weekend and a further eruption was reported on Sunday.

There were no immediate details on the intensity of the Sunday blast.

Vulcanologist Bruno Faria told state-owned Radio Cape Verde the first blast was "much greater than the one in 1995" which showered a cloud of ash across the island at the southern tip of the archipelago.

"The eruption was very fast. But we are appealing to the people for calm," interior minister Marise Morais told the radio in an announcement heard by AFP in Guinea-Bissau.

The eruption reached level three on the nine-level volcanic explosivity index, the minister said.

Morais said the nation was implementing its emergency civil protection plan.

Nelio Santos, a television journalist reached by telephone, told AFP authorities had begun evacuating Cha das Caldeiras, a village of around 750 inhabitants at the foot of the volcano.

"Many people... left without waiting for the instructions from the authorities," he added.

The airport on Fogo was closed Sunday, although it was not immediately clear how many flights had been diverted or cancelled.

The privately-owned, US-based Volcano Discovery website, which tracks volcanic activity worldwide, said a new eruption started Sunday at 10:00 am, with satellite data suggesting some lava at the vent.

Pico de Fogo last erupted on April 2 1995 -- for the first time since June 1951 -- and almost 5,000 people were evacuated while the United States and several European countries sent assistance.

The archipelago, which lies 500 kilometres (about 300 miles) off the coast of Senegal, consists of 10 islands, eight of which are inhabited and volcanic.
Frutselmaandag 24 november 2014 @ 10:14
IW9kiuM.jpg

Fogo at night O+
Frutseldinsdag 25 november 2014 @ 09:59


Fogo
bwtdonderdag 27 november 2014 @ 18:21
Het dorp gaat er aan
VolcanoReport twitterde op donderdag 27-11-2014 om 18:10:12 Fogo volcano, Cabo verde - Portelo village is currently being destroyed - LIVESTREAM link - http://t.co/4AugXjIVLC http://t.co/zciLyHoTOf reageer retweet
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El_Matadorvrijdag 28 november 2014 @ 03:27
wow. Vol.