[Vulkanen] The ring of Fire #3: Eruption of Mayon?

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Op zondag 13 juli 2008 21:16 schreef OA het volgende:

Remote Alaska volcano erupts, spewing rock and ash

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Doden bij vulkaangeweld in Colombia
In het zuidwesten van Colombia zijn door een vulkaanuitbarsting zeker tien doden gevallen. De eruptie was donderdag en leidde bij een aantal dorpen tot aardverschuivingen. Mogelijk stijgt het dodental nog, omdat hulpverleners nog niet alle getroffen gebieden bereikt hebben.

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Vulkaanuitbarsting in Japan
Vanmorgen is een vulkaan in Japan in de buurt van de stad Nagano uitgebarsten. Voorlopig zijn er nog geen slachtoffers of schade. De uitbarsting deed zich voor om 2.00 uur lokale tijd in de vroege morgen. Televisiezenders tonen witte rookpluimen die uit de ondergesneeuwde krater van de berg Asama opstijgen. Die berg is 2.568 meter hoog en bevindt zich op zo'n 150 kilometer van de hoofdstad.



Rond de vulkaan is een veiligheidszone van vier kilometer afgebakend voor de vallende brokstukken. De laatste uitbarsting van vulkaan Asama was in augustus 2008.

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Volcano Erupts Near Tokyo, Raining Ash On City
TOKYO — A snowcapped volcano northwest of Tokyo erupted early Monday, sending up a huge plume of smoke and gas and raining fine, powdery ash on parts of Japan's capital.

There were no reports of injuries or damage from the eruption of Mount Asama, which is about 90 miles northwest of Tokyo.



The volcano erupted at 1:51 a.m. (0451 GMT, 11:51 p.m. EST) Monday, belching out a plume that rose about a mile high, according to Japan's Meteorological Agency. The plume was still roiling over the volcano's crater late Monday.

Chunks of rock from the explosion were found about 3,300 feet away from the volcano. Ash was detected over a wide area, including central Tokyo. In the town of Karuizawa, southeast of the volcano, the ash was thick enough to obscure road markings in some areas, town official Noboru Yanagishi said.

"Some people said they heard a strange noise in the morning when the eruption occurred," he said.

The eruption was not big enough to disrupt daily life near the volcano, though many people awoke to find their cars covered in a fine layer of powder. National broadcaster NHK showed people in Tokyo lining up to get carwashes, or wiping the ash from their windows.
In Tachikawa, a district in the northwest area of Tokyo, some farming areas were coated with ash.

"Because it's February and not harvesting season, there was no real damage to any crops," said Shoichi Matsumoto, a local official.

At Tsumagoi, a small town on the volcano with ski resorts and hot spring baths, residents went about their business as usual. Travelers planning vacations to the area had called to inquire, but no one had canceled, said Masaru Yoshida, a spokesman for the local tourist association.

"The wind has blown the ash to the other side of the mountain," he said. "It's a clear day so you can see some smoke, but not as much as we've had in the past."

Mount Asama has been active for thousands of years.

Its last major eruption took place in September 2004, spewing enough ash to damage local crops. It frequently spews smaller amounts of ash from its crater.

With 108 active volcanos, Japan is among the most seismically busy countries in the world. The country lies in the "Ring of Fire" — a series of volcanoes and fault lines that outline the Pacific Ocean.

An alert level of three was in place Monday for a 2.5-mile radius, which bars entry into the area and urges nearby residents to take caution. Alert level four advises residents to prepare for evacuation, while level five, the highest, orders evacuation, according to the Meteorological Agency.

"We don't think there will be any stronger eruptions, but we don't see the activity stopping anytime soon, either," agency official Kazuya Kokubo said.

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Mt. Asama erupt

TOKYO, Japan (CNN) -- Japan's Mount Asama erupted early Monday, sending a plume of light ash more than a mile into the sky and prompting emergency officials to restrict travel near it.

They issued a level three warning, moderate on the alert scale, which prevents people from entering within a two-and-a-half-mile (4 kilometer) radius of the volcano, according to Jun Funasaki with the Japan Meteorological Agency. There were no reports of injuries or damage.

Mount Asama, located 90 miles northwest of Tokyo, erupted at 1:51 a.m. (11:51 a.m. ET Sunday) and light ash was detected nearly 110 miles (175 km) away. Its last major eruption was in September 2004. Japan has 108 volcanoes

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BULLETIN -- VOLCANO ERUPTS NEAR THE CITY OF PASTO, COLOMBIA

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Authorities have raised the alert level to "red" after an "explosive eruption" at the Galeras Volcano in Colombia, according to local TV.

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Authorities have issued the immediate evacuation of about 8,000 people after the Galeras Volcano erupted near Pasto, Colombia - local media.

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A "large amount of ash" is falling on the city of Pasto after the Volcano Galeras erupted, first eruption since January 2008.

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Volcano erupts in Indonesia

The tallest volcano on Indonesia's Java island has erupted, spewing smoke and ash high into the sky and coating a nearby town in black dust, an official says.

The 3,676-metre Mount Semeru burst into life shortly after midnight on Friday (local time), but officials said it posed no danger to people living in the area, 35 kilometres south-east of Lumajang.

"We recorded that it erupted after midnight on Friday, but luckily we have had rains so the ash isn't causing serious respiration problems for the residents," volcanologist Agus Budianto said.

Winds had also helped to carry the harmful debris away from the most populated areas nearby, he said.

Budianto said there had been no evacuation order but authorities were monitoring the eruption closely for signs of lethal heat clouds.


Semeru in 1985

The Indonesian archipelago sits on the seismically active Pacific Ring of Fire where continental plates collide, and is home to about 130 active volcanoes.

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Op dinsdag 10 maart 2009 16:22 schreef Frutsel het volgende:
http://www.depers.nl/vide(...)kaanuitbarsting.html

welke vulkaan is dit? Kan het filmpje wel bekijken, maar heb geen geluid.
Aan de tekens te zien, ziet het eruit als Japans ofzo?
Tis wel een recente, want het filmpje is van vandaag.

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Eruption at Sakura-jima 10 March 2009
Posted by volcanism in Japan, Sakura-jima, activity reports, eruptions.
Tags: Japan, Sakura-jima, volcanic activity reports, volcanic eruptions
trackback
The highly active stratovolcano Sakura-jima in southern Japan has erupted, say English-language news reports this morning. There are reports of an explosion at 05:22 local time, lava flows, an eruption column of up to 1.2km altitude, and volcanic debris projected to distances of up to 2km from the crater.

The Tokyo VAAC has issued a volcanic ash advisory for the volcano, but no aviation colour code alert has yet been issued. The Japan Meteorological Agency has issued a warning to local residents. The BBC has a video of the current activity.

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Vulkaanuitbarsting Tonga



Een zware aardbeving en vulkaanuitbarsting hebben donderdag en vrijdag voor opschudding gezorgd in Tonga en de omliggende eilandengroepen op ongeveer 2000 kilometer ten noordoosten van Nieuw-Zeeland.

In de archipel van ongeveer 170 eilanden gingen scholen en overheidsgebouwen dicht nadat er was gewaarschuwd voor een tsunami. Het alarm werd enkele uren later ingetrokken.

Op het hoofdeiland van Tonga werd geen schade gemeld. Wel is het onbewoonde eiland Hunga Ha'apai, op 63 kilometer van de Tongaanse hoofdstad Nuku'alofa, verwoest. ,,Er is geen levend wezen meer te bekennen, het is bedekt met een zwarte aslaag'', aldus de Tongaanse journalist George Lavaka. Hij bezocht het bountyeiland op het moment van de zware uitbarsting met een groep wetenschappers, overheidsfunctionarissen en toeristen om te kijken wat de gevolgen zijn van eerdere vulkaanuitbarstingen deze week ,,Er zijn alleen nog zwarte stompjes waar eerst kokospalmen stonden'', aldus de journalist in Australische media. De groep snelde weg van het eiland en zag veel dode vissen en vogels in zee.

Tonga ligt op de zogeheten Ring van Vuur waar continentale platen rond de Grote Oceaan op elkaar botsen waardoor geregeld vulkaanuitbarstingen en aardbevingen plaatsvinden. De vulkaan op Hunga Ha'apai heeft een opening op het eiland en een op ongeveer 100 meter verderop in zee, die vooral in het water spuwde. Boven beide openingen waren vrijdag dikke rookwolken te zien, die tot zeker 20 kilometer de lucht in gingen.

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De onderzeese aardbeving bij Tonga, de eilandengroep bij Nieuw-Zeeland in de Stille oceaan heeft nauwelijks schade aangericht. Daar werd gisteren wel voor gevreesd, nadat direct een tsunami-waarschuwing werd gegeven. Maar de gevolgen bleken niet ernstig.

De zeespiegel was maar een paar centimeter gestegen door een kleine golf. De beving had een kracht van 7.9 op de schaal van Richter.

De waarschuwing zorgde wel voor paniek op Tonga. "Veel mensen renden rond nadat ze de waarschuwing hadden gehoord", staat op een Nieuw-Zeelandse site. In totaal heeft de vloedgolf-waarschuwing een uur geduurd.

Het epicentrum van de aardbeving lag 209 kilometer uit de kust van Nuku'alofa, op Tonga en op een diepte van 10 kilometer.

Tonga ligt op de zogeheten 'Ring van Vuur'. Een lijn die rond de Stille oceaan loopt en waar veel vulkanen actief zijn. De afgelopen weken rommelt het flink.

Vulkaanuitbarsting
Gisteren barstte ook een onderwatervulkaan uit bij Tonga op 10 kilometer van de hoofdstad. De rook- en aspluim was 7 kilometer hoog, maar werd al snel door de wind verspreid.

De as in de lucht is gevaarlijk voor vliegtuigen. Air New Zealand heeft al enkele toestellen laten omvliegen.

"Een onderwatervulkaan is niet ongewoon voor dit gebied", zegt het hoofd van de geologische dienst van Tonga. "We weten dat het ieder moment kan gebeuren."

Aardschokken
Volgens bewoners van het kustgebied begonnen de uitbarstingen maandagochtend na een serie stevige aardschokken.

De Tonga-archipel maakt deel uit van de vuurring, een vulkanische zone van Chili via Alaska en Vanuatu naar Congo.

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Op vrijdag 20 maart 2009 13:56 schreef Frutsel het volgende:

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Foto's en Filmpje

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Brian Whittaker

Image taken:

Mar. 25, 2009

Location:

Airborne at 39,000 feet over Mt Robson, highest point in the Canadian Rocky Mountains (NE British Columbia)

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As I flew past this brownish cloud of what looked to me like volcanic ash, I remembered that Alaska's Mt Redoubt was upstream from my location. Thanks to the SpaceWeather.com published SO2 animation, I was able to confirm my sighting. Volcanic ash has a certain look which can be rather rusty from certain angles with the sun low in the sky.

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[b]Locals Evacuated After Eruption of Chile’s Llaima Volcano

SANTIAGO – The reactivation of the Llaima volcano some 600 kilometers (323 miles) south of Santiago sparked the declaration of a red alert and orders to evacuate local residents, the regional press said.

The volcano, dormant for half a year, erupted again Friday night with explosions and the spewing forth of incandescent material that reached some 600 meters (1,967 feet) above the crater, which is 3,210 meters (10,524 feet) high.

Authorities ordered the closure of Conguillio National Park where the Llaima volcano is located and evacuated the 14 people who were inside it, including five construction workers, seven park guards and two tourists, one a Spaniard and the other Chilean.

The daily El Mercurio also said that three people have been evacuated from the ski resort of Las Araucarias.

The regional government of La Araucania also declared a red alert in eight nearby towns, from which it hopes to evacuate 70 people away from the expected shower of ash and debris.

Regional emergency services that met Saturday in Temuco and were scheduled to meet later in Cherquenco also decided to do a census of domestic animals in the area and analyze the kind of ash pouring from the volcano.

Llaima, considered one of the most active volcanos in South America, is located some 76 kilometers (47 miles) northeast of Temuco, capital of the La Araucania region, and at its feet are the towns of Curacautin, Cherquenco and Melipeuco.[/b]

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Llaima volcano spews lava, ash in southern Chile

SANTIAGO, Chile (AP) - One of Chile's most active volcanos is spewing lava and ash again, prompting evacuations and landslide warnings.

The national emergency department is reporting that the 10,250-foot-high (3,125-meter-high) Llaima volcano has hurled explosive materials up to 600 meters (650 yards) above the crater and issued a flow of lava more than 1,000 yards (meters) long.

A statement from the department Saturday noted that villagers were evacuated as a precaution after officials conducting flyovers saw snow melting around the crater, "which means a high risk of mudslides ... (and) the possible rising of the Calbuco River."

The volcano is located 380 miles (600 kilometers) south of the capital, Santiago.

Its last big eruption was in January 2008. -AP

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Op zondag 5 april 2009 13:00 schreef Ad_rem het volgende:
Pff schrok even maar gelukkig bezoekt m'n vriend nu de Vulkaan in Pucon en ligt die redelijk ver van Vulkaan Llaima.:o

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"La Cumbre" bedroht Tierwelt auf Galápagos-Inseln

Die einzigartige Fauna auf den Galápagos-Inseln ist in Gefahr: Der Vulkan "La Cumbre" ist ausgebrochen, zahlreiche Tiere sind durch die ins Meer fließende Lava bedroht. Menschen sind bislang nicht zu Schaden gekommen.

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Quito - Ein Vulkanausbruch auf den Galápagos-Inseln im Ostpazifik bedroht die einzigartige Tierwelt. Der Vulkan La Cumbre auf der Insel Fernandina speie seit Samstag Lava, Gas und Rauch, teilte die Nationalparkbehörde mit. Anwohner auf der Nachbarinsel Isabela seien nicht betroffen, die ins Meer fließende Lava könne aber Leguane, Wölfe und weitere Tiere schädigen. La Cumbre brach zuletzt im Mai 2006 aus.

Das zu Ecuador gehörende Galápagos-Archipel ist für seine einmalige Tier- und Pflanzenwelt bekannt. Einige Arten wie zum Beispiel die Galápagos-Riesenschildkröte kommen nur auf den mehr als 114 Inseln vor.

Auch in Alaska hat ein Vulkanausbruch Anfang April die Natur gefährdet. Ein Strom von Schmelzwasser und heißen Felsbrocken wälzte sich durch das Tal des Drift River und erreichte das gleichnamige Ölterminal des Chevron-Konzerns.

Ausbruch vereitelte den Plan, die dort gelagerten 23,9 Millionen Liter Öl vorsorglich in Sicherheit zu bringen. Ein Tanker musste unverrichteter Dinge wieder zurückkehren.

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La Cumbre Volcano on Isla Fernandina remained active on April 12, 2009, as the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua passed overhead. According to the U.S. Air Force Weather Agency, the volcano experienced continuous ash and steam emissions.
Compared to the image acquired the previous day, this image shows a much smaller red-outlined hotspot of anomalously warm surface temperatures. The plume has spread over a wider area, and now travels primarily toward the southwest. A segment of the plume appears north of Isla Fernandina, suggesting a shift in wind direction at some point. Compared to the clouds over Isla Isabela and Isla Fernandina, the volcanic plume is slightly darker and thinner, with less distinct margins.

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Chaitén erupted last May for first time in recorded history

Southern Chile’s Chaitén volcano has produced a “continual and sustained increase” in seismic activity in recent days, raising concerns of yet another possible eruption, the National Geologic and Mining Service (SERNAGEOMIN) reported Wednesday.
Since April 7 monitors have recorded an average of 16 small quakes per day, some of them as strong as 4.5 degrees on the Richter scale. Previously the volcano produced an average of 10 daily tremors.

“This could provoke eventual explosions and ash flows that cold affect the adjacent valleys,” said SERNAGEOMIN.

Chaitén erupted last May for the first time in recorded history, sending up a massive plume of ash that at one point reached as far as Buenos Aires, Argentina (PT, May 2, 2008). The Region X volcano, located some 1,200 kilometers south of Santiago, buried the nearby town of Chaitén and forced the evacuation of its approximately 8,000 residents.

Government authorities decided earlier this year not to rebuild Chaitén – which was also badly damaged by floods – on its original location. A decision was made instead to relocate the town to nearby Santa Barbara, where construction on the “new Chaitén” is currently underway.

Chile has one of the most active volcanic chains in the world. Just last week another Chilean volcano, Region IX’s Llaima, erupted, releasing a 7,000-meter-high column of smoke and ash and producing several dramatic lava flows (PT, April 6).

Llaima, one of the country’s most active volcanoes, has erupted several times since mid 2007. In 2008 it brought in the New Year with a spectacular eruption, coughing up huge plumes of glowing lava. Exactly six months later Llaima awoke yet again.

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A volcano in the Galapagos Islands has rumbled into life again a week after it erupted.

The Geophysical Institute of the National Polytechnic School reported 43 thermal alerts and said that satellite images revealed a column of gas that extended more than 60 miles (100 kilometres) west of the islands, indicating an increase in volcanic activity.

The La Cumbre volcano began spewing lava, gas and smoke on Fernandina Island on Saturday after four years of inactivity.

Experts are concerned the activity may be taking a toll on the islands' famed wildlife and will launch a study on the environmental impact of the volcano in the coming days.

Charles Darwin developed his theory of evolution after studying the unique animal populations of the Galapagos Islands - and they have attracted biologists and conservationists ever since.

The islands are scarcely populated, but the United Nations last year said the pristine environment of the Pacific island chain was in danger due to booming tourism.

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Wednesday, May 13, 2009 7:43 AM HST (Wednesday, May 13, 2009 17:43 UTC)

This report on the status of Kilauea volcanic activity, in addition to maps, photos, and webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at http://www.nps.gov/havo/ or 985-6000. Hawai`i County Viewing Area status can be found at 961-8093.

KILAUEA VOLCANO (CAVW #1302-01-)
19°25'16" N 155°17'13" W, Summit Elevation 4091 ft (1247 m)
Current Aviation Color Code: ORANGE
Current Volcano Alert Level: WATCH

Activity Summary for past 24 hours: Glow from the Halema`uma`u vent continues to be visible. Lava from east rift zone vents continues to flow through tubes to the coast and is entering the ocean at two locations west of Kalapana. Sulfur dioxide emission rates from the Halema`uma`u and Pu`u `O`o vents remain elevated.

Past 24 hours at Kilauea summit: A molten lava pool remains near the base of the cavity deep below the floor of Halema`uma`u Crater and is producing a visible, but decreasing in intensity, glow (recorded by both webcams pointed at it - see our new "Webcams" link at hvo.wr.usgs.gov); the decreasing glow suggests that the surface of the lava pool may be receding.

This morning, the gas plume rises about 600 m (2,000 ft) above the Halema`uma`u Crater rim and moves to the west; GOES-WEST imagery shows the plume continuing to the WNW into the east flank of Mauna Loa where it is diverted southward. Sulfur dioxide emission rates remain elevated and variable; the most recent rate measurement was 1,200 tonnes/day on May 12, compared to the 2003-2007 average rate of 140 tonnes/day. Small amounts of mostly ash-sized tephra continue to be produced consisting mostly of Pele's hair, irregular pieces of vesicular glass, and a few hollow spherules. Gas-rushing and rockfall sounds were again heard during the morning collection routine.

Tremor levels remain at moderate values. Two earthquake were located beneath the south summit, five on south flank faults, and only one earthquake was located in the area about 4 km (3 mi) northwest of Halema`uma`u Crater. The number of RB2S2BL earthquakes were within background levels.

The network of tiltmeters at Kilauea's summit recorded no significant tilting. The GPS network (less sensitive than the tiltmeter network) has recorded about 1 cm of contraction across the caldera over the past 3 months.

Past 24 hours at the middle east rift zone vents and flow field: Magma continues to degas through Pu`u `O`o Crater before erupting from vents to the east. The most recent measurement was 1,400 tonnes/day measured on May 8, compared to the 2003-2007 average of about 1,700 tonnes/day. No incandescence was recorded within the crater overnight.

The tiltmeter on the north flank of Pu`u `O`o stopped reporting to HVO just before 8 am Saturday; technicians will resolve the problem later this week when helicopter time becomes available. GPS receivers on opposite sides of the crater have documented about 1.5 cm of contraction over the past month and more than 5 cm over the past 3 months. Seismic tremor levels near the eruptive vents are low and steady.

Lava from the TEB vent and the rootless shield complex flows through tubes to the ocean at Waikupanaha and Kupapa`u. MODIS imagery showed ocean entry plumes moving southwest along the coast yesterday afternoon from lava continuing to enter the ocean. Weak thermal anomalies were present on the coastal plain through this morning in GOES-WEST imagery; anomalies of this intensity are usually not associated with active surface flows but rather inactive, cooling flows.

HAZARD ALERT: The lava delta and adjacent areas both inland and out to sea are some of the most hazardous areas on the flow field. Frequent delta/bench collapses give little warning, can produce hot rock falls inland and in the adjacent ocean, and can produce large but local waves. The steam plume produced by lava entering the ocean contains fine lava fragments and an assortment of acid droplets that can be harmful to your health. The rapidly changing conditions near the ocean entry have been responsible for many injuries and a few deaths.

Maps, photos, webcam views, and other information about Kilauea Volcano are available at
http://volcano.wr.usgs.gov/kilaueastatus.php

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International Space Station Imagery
ISS020-E-009048 (12 June 2009) --- Sarychev Peak Volcano eruption, Kuril Islands, is featured in this image photographed by an Expedition 20 crew member on the International Space Station. A fortuitous orbit of the International Space Station allowed the astronauts this striking view of Sarychev volcano (Russia's Kuril Islands, northeast of Japan) in an early stage of eruption on June 12, 2009. Sarychev Peak is one of the most active volcanoes in the Kuril Island chain and is located on the northwestern end of Matua Island. Prior to June 12, the last explosive eruption had occurred in 1989 with eruptions in 1986, 1976, 1954, and 1946 also producing lava flows. Ash from the June 2009 eruption has been detected 2407 kilometers ESE and 926 kilometers WNW of the volcano, and commercial airline flights are being diverted away from the region to minimize the danger of engine failures from ash intake. This detailed photograph is exciting to volcanologists because it captures several phenomena that occur during the earliest stages of an explosive volcanic eruption. The main column is one of a series of plumes that rose above Matua Island (48.1 degrees north latitude and 153.2 degrees east longitude) on June 12. The plume appears to be a combination of brown ash and white steam. The vigorously rising plume gives the steam a bubble-like appearance; the surrounding atmosphere has been shoved up by the shock wave of the eruption. The smooth white cloud on top may be water condensation that resulted from rapid rising and cooling of the air mass above the ash column, and is probably a transient feature (the eruption plume is starting to punch through). The structure also indicates that little to no shearing winds were present at the time to disrupt the plume. Another series of images, acquired 2-3 days after the start of eruptive activity, illustrate the effect of shearing winds on extent of the ash plumes across the Pacific Ocean. By contrast, a cloud of denser, gray ash -- most probably a pyroclastic flow -- appears to be hugging the ground, descending from the volcano summit. The rising eruption plume casts a shadow to the northwest of the island (bottom center). Brown ash at a lower altitude of the atmosphere spreads out above the ground at upper right. Low-level stratus clouds approach Matua Island from the east, wrapping around the lower slopes of the volcano. Only about 1.5 kilometers of the coastline of Matua Island (upper center) can be seen beneath the clouds and ash.

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Authorities raise Mt. Talang alert level to highest

The vulcanology and disaster mitigation office in West Sumatra has raised the alert status for Mt. Talang to the highest level following a 6.9-magnitude earthquake and a series of aftershocks that struck the province.

Vulcanologist Dalipa Marjusi said Tuesday the tremors had sparked a volcanic earthquake and temblors, although eruption of the volcano remained undetected.

“Since Sunday’s earthquake we have recorded 1,600 volcanic quakes and 700 tectonic quakes, but only 23 of them were felt,” Dalipa said.

Fog has blanketed the summit of the 2,597-meter volcano for the last two days, making it difficult to see ash or lava that might be erupting from its crater.

The volcano last spewed hot ash last April.

A seven-strong team from the directorate general of vulcanology and disaster mitigation have arrived in Padang from Bandung to monitor the volcano’s activities.

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Op woensdag 19 augustus 2009 15:37 schreef Frutsel het volgende:

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Dankzij die quake dus?

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Phivolcs notes 3 minor ash explosions at Mayon

More At least three minor ash explosions were recorded at Mayon Volcano in Bicol early Tuesday, prompting authorities to appeal anew to the public to stay away from the volcano's danger zones.

The Philippine Institute of Volcanology and Seismology (Phivolcs) said the three minor ash explosions were recorded at 5:37 a.m.

"These events lasted for about three minutes. The explosions produced a brownish ash column that rose about 700 meters above the crater and drifted to the southwest," it said in its advisory.

On the other hand, Phivolcs said a "faint crater glow" was observed Monday night.

Radio dzXL reported Tuesday noon that the Phivolcs has started coordinating with the Albay Public Safety and Disaster Management Office to prepare for possible evacuation of residents.

The Phivolcs said that in the last 24 hours, the seismic network recorded 11 volcanic earthquakes.

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Seismologen vrezen nu uitbarsting vulkaan op Sumatra

Seismologen vrezen dat de aardbeving en mogelijke naschokken voor de kust van Sumatra kunnen leiden tot vulkaanuitbarstingen. Op Sumatra liggen drie grote vulkanen: Merapi, Talang en Tandikat. Op Sumatra, een van de grootste eilanden ter wereld, leven meer dan veertig miljoen mensen.

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Op donderdag 1 oktober 2009 16:12 schreef Frutsel het volgende:

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Fresh lava domes fill most of the 10,000-year old caldera of Chaitén volcano. Dome 1 began forming in May of 2008, when Chaitén erupted for the first time in written history. Dome 2 began growing later, in the fall of 2008. Shifting winds were blowing the plume of ash and steam to the southeast, revealing the northern and western sides of the two domes (the southern side of Dome 1 was visible on September 27, 2009).

According to Servicio Nacional de Geología y Minería [SERNAGEOMIN—the Chilean National Geological and Mining Service (translated by The Volcanism Blog)], the dome complex is currently growing steadily. Active lava domes are extremely unstable and dangerous. They are often steep-sided, composed of weak rocks, and prone to frequent collapses. A lava dome collapse can release one type of pyroclastic flow, a fast-moving landslide composed of extremely hot rocks, ash, and gas.

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Op donderdag 1 oktober 2009 16:14 schreef Againzender het volgende:

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is het wel eens voorgekomen eigenlijk dat vulkaanuitbarstingen getriggered werden door aardbevingen?

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Large earthquakes may trigger volcanic eruptions
10 December 2008

Large earthquakes can trigger volcanic eruptions up to a year later and up to 500 kilometres away from their epicentres, according to new research


^{Parinacota volcano, Chile}

The findings suggest that volcanoes in regions of high earthquake activity should be more closely monitored after a large earthquake has struck.

Sebastian Watt and colleagues Professor David Pyle and Dr Tamsin Mather from the University of Oxford analysed continuous records of earthquakes and volcanic eruptions from southern Chile going back to 1850. Records since then include 206 eruptions from 25 different volcanoes.

Two major earthquakes in 1906 and 1960 led to a large rise in the number of volcanic eruptions in the year following each earthquake. Before the end of 1907, seven volcanoes erupted and by the end of 1961 after the 1960 earthquake, there were six eruptions. On average, the researchers say, there are 1.32 eruptions every year in this region.

Watt and his colleagues also studied data from records that weren't continuous, and linked two large earthquakes in 1751 and 1835 to an increase in volcanic activity in the area. The work is due to be published in the journal Earth and Planetary Science Letters.

'We had access to data going back to 1550, but decided not to include large chunks of it because it wasn't continuous and therefore wasn't completely reliable,' says Watt.

^{'This could also be happening in other areas with
high earthquake and volcanic activity, like Indonesia and Alaska.'
Sebastian Watt, University of Oxford}

Charles Darwin also noticed that volcanoes to the north of the 1835 earthquake in Concepción, Chile were 'in great activity' a few days after the earthquake and the whole of the volcanic chain was active for the rest of the year.

Despite Darwin's observations, linking large earthquakes with volcanic eruptions is a fairly young science and many scientists have been sceptical.

'Previous studies looked at global datasets, where it's very difficult to elucidate a link on a timescale longer than a few days,' says Watt.

Looking at the detail
Watt and his team took a different approach. They are the first to look at a longer timescale and focus on a specific area. Along the continental margin - where the oceanic crust meets the continental crust - Chile has some of the largest earthquakes in the world with magnitudes over eight on the Richter scale.

Next to the continental margin, following the Andes, the country also has numerous active volcanoes in a so-called 'arc' - where one tectonic plate moves beneath another.

'At the moment the precise process causing eruption is unclear. Given the distance at which this eruption-triggering happens, we suggest that seismic waves radiating from the earthquake zone disrupt bodies of molten rock beneath volcanoes eventually leading to eruption.

'The same process could also happen in other areas with high earthquake and volcanic activity, like Indonesia and Alaska.

'The next step is to investigate the mechanisms causing this by studying specific eruptions and looking at the rocks spewed out,' Watt adds.

quote:

Cleveland volcano erupts in Alaska

CHUGINADAK ISLAND, ALASKA (BNO NEWS) – Alaska’s Cleveland Volcano briefly erupted on Friday evening, according to volcanologist on Saturday, but no one was thought to be at risk.

Friday’s eruption was described as being brief and started at around 11.30 p.m. local time (0730 UTC). According to the Alaska Volcano Observatory (AVO), satellite data indicated that the Cleveland volcano was producing an ash cloud to maximum altitudes of 15,000′ to 20,000′ (4.5 to 6.1 kilometers).

In response to the eruption, the center raised the aviation color code to Orange and the volcano alert level to “Watch.”

“The lack of a real-time seismic network at Cleveland means that AVO is unable to track local earthquake activity related to volcanic unrest,” a statement from the agency said. “Short-lived explosions with ash plumes that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.”

The volcano is located on the western half of Chuginadak Island, a remote and uninhabited island in the east central Aleutian Islands of Alaska. It is located about 45 miles (75 kilometers) west of the community of Nikolski, which has only a few dozen residents. Cleveland has seen an increase in activity over the past decade. Friday’s eruption marks the third one this year, with earlier eruptions in January and June.

The volcano’s most recent significant eruption began in February of 2001, when it produced three explosive events that created ash clouds as high as 39,000 ft (12 kilometer) above sea level. The eruption also produced a lava flow and a hot avalanche that reached the sea.

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Op zaterdag 3 oktober 2009 22:11 schreef Frutsel het volgende:
[ afbeelding ]

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Op donderdag 1 oktober 2009 16:28 schreef Frutsel het volgende:
Zeker wel... de meeste vulkaanuitbarstingen gaan gepaard met aardbevingen. Vaak zijn die kleine bevingen juist de voorbode. Maar een grotere kan zeker een vulkaan triggeren, maar tis niet zo dat het altijd zo is.

In maart 2009 brak er een vulkaan open in de Stille Oceaan bij Tonga... toevallig was die dag ervoor een quake van 7.9 geweest

Vulkaanuitbarsting in Grote Oceaan

Maar geen idee of het in dit geval echt wetenschappelijk bewezen is dat één het gevolg is van het andere.

quote:

Montserrat
Die foto

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An observation flight showed extensive growth of the lava dome on the southern side, although cloud obscured the other faces. The full extent of pyroclastic flows associated with lava dome growth and collapse over the last six days is now known. Pyroclastic flow deposits extend to 3 km down the White River valley to the south; 1 km down Gages valley to the west; 2.5 km down Tyers Ghaut to the north-northwest. In the last 24 hours pyroclastic flows have begun to move down Tuitts Ghaut and into Whites Ghaut, reaching 3 km to the northeast. No pyroclastic flow deposits were identified in the Tar River valley associated with this renewed phase of dome growth.

quote:

Activity was high on Friday October 16 with several large pyroclastic flows reaching the sea down the White River to the south. In addition there were a number of moderate sized pyroclastic flows to the north east moving down Tuitts and White Bottom Ghaut to about 3 km from the lava dome. Only one or two small pyroclastic flows moved down Tyers Ghaut.

The extensive ash clouds formed rose to a maximum of 20,000 ft moved to the west-northwest and resulted in only minimal ash fall in inhabited areas. Activity decreased at around 5 pm on October 16, and since that time rockfalls and pyroclastic flow signals appear to be occurring in discrete cycles around 2.5 - 3 hours apart. Similar cyclicity has been recognised previously at the volcano, the last time being during the activity in December 2008.

MVO, 10:00 am, October 17, 2009

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Vulkaan Mayon op Filipijnen weer actief
De Mayon-vulkaan op de Filipijnen heeft as in de lucht geslingerd. De asregen kwam neer op verschillende dorpen aan de voet van de 2.472 meter hoge vulkaan, 375 kilometer ten zuidoosten van Manilla. Het vulkaaninstituut waarschuwde voor een mogelijke uitbarsting en riep de bewoners op ver van de krater weg te blijven.

De Mayon is de laatste 400 jaar een vijftigtal keer uitgebarsten. In 1814 kwamen op de hellingen 1.200 mensen om het leven. Bij een uitbarsting in 1993 stierven 79 mensen. Toen de vulkaan in 2006 actief werd, moesten 30.000 mensen in veiligheid gebracht worden.

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Philippines' Mayon volcano spews ash, could erupt

MANILA, Philippines — The cone-shaped Mayon volcano in the central Philippines, which killed scores in an eruption 16 years ago, shot up an ash plume Wednesday — prompting hundreds of nearby residents to evacuate in case it blows again.

Chief state volcanologist Renato Solidum said the alert level remains the same at Mayon, the country's most active volcano, but that if magma continues to rise below the glowing crater there could be another eruption within weeks.

In Daraga township south of the volcano's crater, Mayor Cicero Triunfante ordered the early evacuation of more than 800 residents in the villages of Matnog and Banadero on fears that it might be in the path of superheated volcanic debris called pyroclastic flow.

Elsewhere, officials distributed wireless public address systems to more than 700 village and town officials to help them make emergency evacuation announcements if necessary, said provincial disaster officer Cedric Daep.

He said mass evacuations would be ordered once the Philippine Institute of Volcanology and Seismology raises the alert to the next higher level. About 30,000 people were evacuated when it last erupted in 2006.

Officials repeated warnings over radio stations early Wednesday against mountain climbing, gathering orchids, farming and other "human activities" on the slopes of the 8,070-foot (2,460-meter) volcano, Daep said.

Resident volcanologist Ed Laguerta said ground measurements showed that the upper slopes of Mayon were slightly inflated, indicating the presence of rising magma, and that minor ash explosions are to be expected. Hourly measurements were being taken, he added.

Two explosions early Wednesday sent ash and rocks more than half a mile (a kilometer) into the air. A thin layer of ash fell on the nearby towns of Camalig, Guinobatan and Ligao on Mayon's southwestern foothills.

Mayon's most violent eruption, in 1814, killed more than 1,200 people and buried a town in mud. A 1993 eruption killed 79 people.

Typhoon-triggered mudslides near the mountain in 2006 buried entire villages, killing more than 1,000 people.

The Philippines is in the Pacific "Ring of Fire," where volcanic activity and earthquakes are common

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Denpasar (ANTARA News) - The status of Mt Batur in Kintamani, Bali, has been raised from active-normal to alert due to its increasing activity as recording 21 times of vulcanic tremor with a maximum amplitudo of 1-12 MM since September

"This happens because the volcano that last erupted in 2000 has shown an increasing activity, as seen by the black smoke coming out of the mountain several times," head of the mountain`s monitoting center, Anak Agung Anom Karsana, said here on Monday.

Under a normal condition tremor happens only five times a day but now it reaches 60 times a day and it is felt by people living within a radius of one to two kilometers from the mountain, he said.

He said he had banned people or tourists from climbing the mountain.

quote:

Wednesday, November 11, 2009
Batur Volcano, Bali, Indonesia - John Seach
Posted by John Seach
Hiking trail has been closed at Batur volcano in Bali, Indonesia due to fears of an eruption. Since 1st November 2009 there have been 53 deep and 83 shallow volcanic earthquakes. Evacuation will be necessary if the alert level is raised to the next higher level. Currently residents are allowed to continue activities around the volcano, but should stay away from the summit area. Batur volcano is a popular tourist location on Bali, and offers spectacular views of one of the world's most impressive calderas. The last eruption of Batur volcano was in 2000 when ash emissions reach a height of 300 m above the summit.

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Op woensdag 11 november 2009 21:14 schreef Frutsel het volgende:
Mayon is een gevaarlijk vulkaantje idd
Bali dus ook... ook in beide gebieden aardbevingen... Filijpijnen kreeg een 5.5 vandaag

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Karangetang volcano (Siau Island, Sangihe Islands): small explosions
Navigation:
All news about: Karangetang volcano (Siau Island, Indonesia): news & eruption updates

Karangetang is active again, as the GVP/USGS editors report citing local newspaper sources. Batur might be getting active. According to news articles, a pyroclastic flow and a lahar occurred on 4 November. Residents saw active lava flows the next day. On 11 November, incandescent material was ejected
5 m into the air.

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Chaitén volcano (Chile), eruption update: growing lava dome
09h25 AM | Age: 3 hrs
Chaitén's lava dome continues its growth and can shed pyroclastic flows and produce ash eruptions at all times. The alert level remains at its highest (red).

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Op donderdag 12 november 2009 12:39 schreef Frutsel het volgende:
WTF
Is dat een photoshop foto?

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Op donderdag 12 november 2009 13:35 schreef Frutsel het volgende:
Vind het een superheftige foto

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Op donderdag 12 november 2009 13:41 schreef Jumparound het volgende:
Hoeft geen gesoepte foto te zijn trouwens.

Chile: Tierra de volcanes. Erupción en Chaitén

...::::::::::ERUPCION VOLCAN CHAITEN CHILE::::::::::...

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Op donderdag 12 november 2009 12:10 schreef kahaarin het volgende:

[..]

Hmm, deze doet ook al mee:
[..]

http://www.volcanodiscovery.com/en/volcano_news.html

[ afbeelding ]

Het lijkt wel dat ze elkaar aansteken, mexican flu?

Chili ook al, met een oude bekende:
[..]

Dat is pas een gevaarlijke vulkaan!

[ afbeelding ]

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Op donderdag 12 november 2009 13:51 schreef kahaarin het volgende:

[..]

Ik ook, vandaar dat ik hem hier neerzet!
[..]

Nee, dat denk ik ook niet, ik heb ooit eens een youtube filmpje gezien van de chaiten, kan hem zo niet meer vinden, dat zag er wel heftig uit.

Jullie subtitles zijn wel leuk onder elkaar, purr feed me en bedankt voor de vis.

* kahaarin gooit een stukje zalm in de groep*

Ah, gevonden! Lijkt me toch geen fotoshop:

Chile: Tierra de volcanes. Erupción en Chaitén

...::::::::::ERUPCION VOLCAN CHAITEN CHILE::::::::::...

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Nevado del Huila volcano (Colombia), activity update: rapid lava dome growth
09h21 AM | Age: 5 hrs
The lava dome of Nevado del Huila continues to grow rapidly as INGEOMINAS reports. The volume of the new lava dome is estimated as nearly 25 million cubic meters. Small collapses occurred on the W part of the dome and gas
emissions were sometimes accompanied by pulsating ash emissions. Sulfur dioxide plumes rose 2.5 km above the lava dome and were seen in satellite imagery and the web camera drifting with the prevailing winds.

quote:

Mayon volcano, Philippines emitted 973 tons of sulphur dioxide yesterday, compared to 500 tons average

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Op woensdag 18 november 2009 12:16 schreef Frutsel het volgende:
[ afbeelding ]

LEGAZPI CITY, Philippines – After spewing ash at least thrice last Wednesday, Mayon Volcano emitted a crater glow that grew more intense and was visible as far as 15 kilometers away the other night.

Ed Laguerta, resident volcanologist here of the Philippine Institute of Volcanology and Seismology (Phivolcs), said Mayon’s surface remains inflated despite the series of ash or phreatic explosions.

“This means that magmatic pressure inside the volcano is sustained. But all these activities are still within alert level 2,” Laguerta said in a radio interview.

He dismissed reports that Mayon is now gradually going back to normal due to fewer volcanic quakes detected after the ash explosions.

At least eight tremors were recorded in the past 24 hours, while the volcano’s sulfur dioxide emission was measured at 514 tons, way above the normal volume of 500 tons per day.
==================
[..]

Er broeit daar iets

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Twitter Updates - John Seach
Twitter Updates
Mayon volcano, Philippines emitted 973 tons of sulphur dioxide yesterday, compared to 500 tons average 18 minutes ago

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Op woensdag 18 november 2009 12:24 schreef kahaarin het volgende:

[..]

Lol, je was me net voor, de twitter van John Seach maar in de gaten houden denk ik, er broeit daar zeker iets:
[..]

http://volcanolive.blogspot.com/
Hopelijk zijn ze op tijd met evacueren, bijna de dubbele uitstoot lijkt me niet goed.

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Op woensdag 18 november 2009 12:32 schreef Frutsel het volgende:

[..]

Sorry
Jij twittert dus ook? Ik volg hem sinds vanochtend, zat verkeerd te zoeken, dacht dat hij het niet had. Via zijn site kwam ik er op

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Galeras

GalerasLocation in Colombia
Elevation 4,276 metres (14,029 ft)[1]
Location Nariño, Colombia
Range Andes
Coordinates 01°13′00″N 77°22′00″W / 1.2166667°N 77.3666667°W / 1.2166667; -77.3666667Coordinates: 01°13′00″N 77°22′00″W / 1.2166667°N 77.3666667°W / 1.2166667; -77.3666667[1]
Type Complex volcano
Volcanic arc/belt North Volcanic Zone
Last eruption September 30, 2009
Galeras (Urcunina among the 16th-century indigenous people) is an Andean stratovolcano in the Colombian department of Nariño, near the departmental capital Pasto. Its summit rises 4,276 metres (14,029 ft) above sea level. It has erupted frequently since the Spanish conquest, with its first historical eruption being recorded on December 7, 1580.[2] A 1993 eruption killed nine people, including six scientists who had descended into the volcano's crater to sample gases.[3] It is currently the most active volcano in Colombia.

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Evacuations near Galeras volcano
Following a strong eruption of the southern Colombian Galeras volcano on Friday, more than a thousand people responded to authorities' calls to evacuate the region.



The volcano, that has caused several alerts over the past year, erupted again on Friday, forcing local authoritis to declare a red alert and call on the thousands of inhabitants of the region to evacuate.

Locals are asked to put on masks to avoid inhaling ash coming from the volcano.

Geologists monitoring the volcano's activity declared a code orange a few weeks ago and have been expecting the volcano to erupt. Until now, the majority of the locals refused to leave their homes.

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Op maandag 23 november 2009 13:54 schreef Frutsel het volgende:
Gevaarlijke vulkaan bij Napels komt tot leven? Let's drill!

quote:

Wednesday, November 25, 2009
Karkar Volcano, Papua New Guinea - John Seach
Posted by John Seach
An eruption occurred at Karkar volcano at 6:39 pm on 25th November 2009. The eruption plume reached a height of 45,000 ft. A magnitude 5.1 earthquake hit 90 km SSE of Karkar volcano 7.5 hours before the eruption.

quote:

Gaua Volcano, Vanuatu

An increase in activity at Gaua volcano, Vanuatu has forced the evacuation of over 300 people from three villages on the west coast of Gaua Island. People have been suffering from respiratory problems in the last few days as a strong wind has carried the gas and ash over villages. Two boats from the police and health department in Torba are starting to evacuate people this morning. Negotiations are taking place with ships owners to help with the evacuation because the two motor boats cannot carry enough people. Chiefs from two villages, Namasari and Lembot, from the east of Gaua met yesterday about housing the relocated people. The National Disaster Management Office has maintained the level of alert on 2 (out of a maximum 4) but during the past days, a fall and gas emission has increased.

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Op donderdag 26 november 2009 10:46 schreef Jumparound het volgende:
ik denk dat je dat pas kan zeggen als er nóg meer vulkanen actief worden. 3 of 4 is toch niet zo spannend?

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Op donderdag 26 november 2009 13:28 schreef Frutsel het volgende:
Misschien is het louter de media hoor... je hoort immers ook steeds meer nieuws over meteoren die gespot worden.

We naderen 2012...

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Op donderdag 26 november 2009 13:38 schreef Jumparound het volgende:

[..]

het is de media
ik zie hier niet meer of minder aarbevingen dan voorheen
http://earthquake.usgs.gov/
En als de waarnemingen verbeteren lijkt het ook alsof er steeds meer meldigen zijn

Maar de tijd zal het leren!

quote:

Op donderdag 26 november 2009 13:38 schreef Jumparound het volgende:

[..]

het is de media
ik zie hier niet meer of minder aarbevingen dan voorheen
http://earthquake.usgs.gov/
En als de waarnemingen verbeteren lijkt het ook alsof er steeds meer meldigen zijn

Maar de tijd zal het leren!

quote:

Op donderdag 26 november 2009 13:43 schreef Frutsel het volgende:

[..]

Grappig
In het Centrale Aardbevingstopic, had ik net dinsdag gemeld dat ik het gevoel had dat er meer aardbevingen waren (in Californie dan)
Aardbevingen #8:

Media is zeker een ding, maar misschien dat hier nu ook meer mensen komen die het interessant vinden en nieuws posten

quote:

Op donderdag 26 november 2009 13:46 schreef Againzender het volgende:

[..]

Het valt zo moeilijk te meten of er nu meer vulkaanuitbarstingen of aardbevingen zijn dan 'vroeger'. We hebben nu gewoonweg veel meer meetpunten.

Maar als er straks bij Napoli een grote vulkaan knalt, dan loopt dit topic wel storm denk ik