Vulkanen IJsland #16 met een Grimmige Grimsvotn.

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Flood close to Iceland volcano expected to peak today
_{Posted on03 November 2010.}
Water levels in the Gigjukvisl river in south Iceland, close to Grimsvotn volcano, have risen by about 40 cm since last night. River flow measured 1659 cubic metres just before 18:00 yesterday evening and this morning’s measurements show that the river flow is currently more than 2000 cubic metres.
Egill Axelsson, a Hydrographic specialist working at the Icelandic Met Office (Vedurstofa Islands) commented, “If this continues then we estimate that the flood will reach its peak this afternoon.”

According to mbl.is, Gunnar Gudmundsson, a geophysicist at the Icelandic Met Office said, “There was an increase in turbulence in Grimsvotn at 03:30 this morning but this has remained stable since. The turbulence has not grown in other vicinities nearby, so now it is a question of what does this mean?”
Gudmundsson added, “I am not excluding the fact that this could develop into a small volcanic eruption. However, if this does turn out to be the case, then it will be something similar to the eruption in 2004, which was not major.”
The Grimsvotn volcano eruption in November 2004 lasted for one week but no glacier burst proceeded. Volcanic ash from the volcano fell as far away as mainland Europe, however no disruptions to air traffic were caused.

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Op woensdag 3 november 2010 15:16 schreef lipjes het volgende:
en we gaan weer verder.
Weet iemand trouwens nog meer mooie vulkaanfilms naast Volcano en Dante's Peak?

*Thnx Horned_Reaper. *

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Op woensdag 3 november 2010 15:21 schreef Drassss het volgende:
Ik ga het ook eens volgen. 0,0 verstand van, maar dat komt vanzelf wel.

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No signs of a eruption at Grímsfjall volcano, harmonic tremors continue
Posted on November 3, 2010 by Jón Frímann
Since 02:30 UTC on the 3rd of November 2010 there has been constant harmonic tremor in Grímsfjall volcano. It is currently unclear why harmonic tremors are happening at Grímsfjall volcano. But there have been some ideas that this might be because a small eruption has started at Grímsfjall volcano.

According to news from few moments ago (around 14:00 UTC) there are no signs of a eruption at Grímsfjall volcano at present time. But harmonic tremors continue at this moment like they have been doing since 02:30 UTC last night.

The possible reason why the scientists dont see any signs of a eruption is because none are visible on the glacier at the moment. But until something appears on surface what is going on in Grímsfjall it is going to remain unclear what is going on at the volcano.

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Plotselinge turbulentie gemeten in Grímsfjall vanavond. Steinunn Jakob, geofysicus aan de IJslandse Meteorological Office, zei het moeilijk te zeggen wat er precies gebeurd, maar op ongeveer de helft drie in Grímsfjall onrust heeft verhoogd op basis van de meter. Wetenschappers nu afvragen of de stroom is er veranderd in het vloedwater. Steinunn zegt onrust geeft niet aan dat een uitbarsting op komst is. Vliegtuigen van de kustwacht is nu op weg naar Grímsvötum. Geologen van de Universiteit van IJsland en diensten zijn opgenomen in de beweging om de situatie te beoordelen.

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Op woensdag 3 november 2010 15:40 schreef mouzzer het volgende:
In april kon ik niet naar New York vanwege de vulkaanuitbarsting in IJsland en nu ga ik volgende week voor 3 weken naar Patagonie en begint het gezeik weer... het is dus weer afwachten wat er gaat gebeuren.

Wilde in Chili eigenlijk nog een actieve vulkaan beklimmen maar dat paste helaas niet in het schema, vooral de manier hoe je dan weer naar beneden gaat is geweldig:

Villlarrica descent

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Op woensdag 3 november 2010 15:59 schreef lipjes het volgende:
kunnen we al ergens wedden of die dit jaar nog gaat uitbarsten?
zo ja, dan zet ik in op wel

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New eruption could be looming in Iceland, experts warn

REYKJAVIK An Icelandic volcano has shown signs it could be about to burst into life, just months after an eruption from another volcano caused Europe's biggest air shutdown since World War II, experts said Monday.
"The water levels have tripled in (the river) Gigja since last night," water measurement specialist Gunnar Sigurdsson of the Icelandic Meteorological Institute told AFP.
The water flooding into the Gigja, on the Vatnajoekull glacier in eastern Iceland, comes from an icy lake in the crater of the Grimsvoetn volcano.
Due to increased thermal temperatures, the lake and surrounding glacier area has melted, filling the crater to a point where it has spilled over and caused a so-called river-run, which in turn could easily set off an eruption.
"When a river-run occurs, the pressure, in this case, in Grimsvotn, decreases, and with less pressure, there is a chance of an eruption from the volcano," Thorunn Skaftadottir, a geophysicist also with the Icelandic Meteorological Institute told AFP.
"This is not guaranteed," she pointed out, since an eruption "can only happen if the volcano has collected enough magma."
In 2004, a similar flood from the Grimsvoetn lake was closely followed by an eruption from what is considered Iceland's most active volcano.
Sigurdsson said an eruption was unlikely to occur "until the water levels in Gigja have reached a maximum.
"I don't know when we can expect the levels to reach their highest point, but I suspect it will be in a few days," he said.
Over the past 48 hours, the Meteorological Institute has also registered strong seismic activity in the area, and three moderate earth quakes ranging from 2.7 to 4.0 on the Richter scale.
Icelandic authorities were however unable Monday to say whether an eruption at Grimsvotn would hit air traffic as hard as in April when the Eyjafjoell volcano erupted, dispersing a massive cloud of ash which affected more than 100,000 flights and eight million passengers.
"It is near impossible to say if Grimsvotn erupts whether it will have an affect on air traffic at all," said Keflavik Airport spokeswoman Hjordis Gudmundsdottir, pointing out it would depend if the volcano spewed lava or ash.
"If it is an ash eruption, then it would affect air traffic, but only if it is a strong eruption with ash clouds reaching significant heights," she said, adding "it will also depend on wind, so at this point it is hard to guess."
Skaftadottir meanwhile said that any eruption from Grimsvotn would be an ash eruption.
"However, the scale of the eruption will be much smaller than the Eyjafjoell eruption and I do not think it would have the same effect on air travel as Eyjafjoell did," she said.

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Op woensdag 3 november 2010 19:28 schreef horned_reaper het volgende:

[..]



Maar niet voor 10 uur in de ochtend

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Glacier flood from Grímsvötn has peaked, harmonic tremors continue
Posted on November 3, 2010 by Jón Frímann
According to news the glacier flood from Grímsvötn has peaked and is already dropping down. So far there has not been any volcano eruption. But harmonic tremor is still ongoing in Grímsfjall volcano and does not show any signs of stopping. But this harmonic tremor appears to be a bit fluctuating for some unknown reason

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Op woensdag 3 november 2010 19:35 schreef Isiolo het volgende:
03-11-'10 16:44:12 -17.20 64.80 5.6 Km 2.1
03-11-'10 10:45:30 -17.26 64.42 1.9 Km 1.6
03-11-'10 10:29:52 -17.30 64.41 0.1 Km 1.6
03-11-'10 10:20:34 -17.20 64.81 5.1 Km 1.8
03-11-'10 10:19:53 -17.35 64.46 4.0 Km 1.8
03-11-'10 09:15:41 -17.26 64.43 2.0 Km 1.6
03-11-'10 09:03:10 -17.24 64.42 1.3 Km 1.6
03-11-'10 08:39:17 -17.32 64.42 2.2 Km 1.7
03-11-'10 04:43:00 -17.30 64.42 1.8 Km 1.7
03-11-'10 02:29:11 -17.23 64.47 0.1 Km 2.7
03-11-'10 02:29:10 -17.23 64.47 0.1 Km 3.1

[ afbeelding ]
[ afbeelding ]

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Op woensdag 3 november 2010 19:38 schreef Isiolo het volgende:
Wel is de hoeveelheid uitstromend water aanmerkelijk toegenomen, van 1600 m3/sec gisteren naar 2600 m3/sec vandaag. Dit lijkt wel het maximum te zijn, want bij de bron neemt de hoeveelheid alweer af.

vreemd hoor

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Op woensdag 3 november 2010 19:42 schreef Isiolo het volgende:

[..]

http://www.ijsland-enzo.nl/index.asp

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Op woensdag 3 november 2010 23:30 schreef Isiolo het volgende:

[..]

niet helemaal...

hieronder laatste uitbarsting 1-nov-2004

[ afbeelding ]
[ afbeelding ]

176 bevingen

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Op donderdag 4 november 2010 13:05 schreef Keiichi het volgende:

[..]

De tremors kakken flink in.

Misschien draaide de vulkaan in z'n slaap zich even om en meer niet...

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Alyson says:
November 4, 2010 at 15:41
Hi Jon
I did write to Mila to ask about the web-cams but I did not get a reply from them. I have been watching Eyaf today and there were a couple of small whisps this morning but the area of steam or cloud seems a bit larger and steadier and more consistent this afternoon. It could of course just be cloud, perhaps above a warmer area? Otherwise the sky is clear there today so I wonder if it may be that announcing her demise was a bit premature.

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Renato Rio says:
November 4, 2010 at 16:08
Alyson: About two days ago I posted a link to images of Fimmvörduháls where lava was still glowing within the tubes. Some steaming can be expected from the eruption which is gone by now.

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Alyson says:
November 4, 2010 at 16:35
Thanks Renato
It is still steaming steadily today, more so than I have noticed in recent weeks.

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Op donderdag 4 november 2010 19:05 schreef Godfokt het volgende:
Hier is trouwens ook inneens veel activiteit.

[ afbeelding ]
16 Krísuvík Kraterrij

Handige map Kahaarin

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Krýsuvík
From Wikipedia, the free encyclopedia
The geothermal area Krýsuvík is situated on the Reykjanes peninsula in Iceland. It is in the south of Reykjanes in the middle of the fissure zone on the Mid-Atlantic Ridge which traverses Iceland diagonally from the south-west to the north-east of the island.
Krýsuvík is one of Iceland's high temperature areas. This becomes visible through the sulphur springs and hot springs at Seltún and another similar area nearby.
At Seltún, one finds by now some explanations to the phenomena to see, a wooden show path and hiking trails leading up the mountain Sveifluháls behind.


Krýsuvík
The biggest lake in the area, Kleifarvatn, began to diminish after a big earthquake in 2000; 20% of its surface has since disappeared.
Some of the minor lakes show also the influence of volcanism, so for example Grænavatn with its luminous green colour.
In this area, there had been some farms till the 19th century. But they had to be given up. Only a small chapel, Krísuvíkurkirkja built in 1857, remained until it burned to the ground on January 2, 2010.

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Op vrijdag 5 november 2010 13:48 schreef lipjes het volgende:
Misschien nog wel een interessant kaartje na wat onderzoek over Hekla gevonden.

[ afbeelding ]

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Op vrijdag 5 november 2010 18:00 schreef lipjes het volgende:
Ik heb trouwens mijn planning voor vakantie gedaan voor volgend jaar.
een rondreis van 2 weken door ijsland en dan de grote en recent actieve vulkanen bezoeken.

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Op vrijdag 5 november 2010 18:14 schreef Basp1 het volgende:

[..]

In de winter is het ook nogal lang donker in ijsland. Dan heb je dagen van 2 uur licht.

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Old Geothermal Borehole in Krýsuvík Bursts
Those who have visited the geothermal area Seltún in Krýsuvík lately have noticed that geothermal holes that were drilled in the 1950s have become active again.

^{From Krýsuvík. Photo by Eygló Svala Arnarsdóttir.}
Ómar Smári Ármannsson who passed through the area recently told Morgunbladid that clay burst out of one hole after it began snowing last week and loud thuds near the hole indicate that it might burst again.

The hole has been fenced off but Ármansson said it is necessary to take further security measures as Seltún is among the country’s most frequented tourist attractions. Not long ago there was a steam explosion in another borehole in the area.

In October 1999 one of these holes exploded loudly. Mud spread as far as 700 meters and the hole formed a crater measuring 43 meters in diameter.

A shed located 100 meters from the hole was damaged in the explosion; windows were shattered and a large rock fell through the roof.

Click here to watch an audio slideshow about Krýsuvík.

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More earthquakes at Esjufjöll volcano
Posted on November 13, 2010 by Jón Frímann
It seems that Esjufjöll volcano is not done with the earthquakes. But over the past few weeks since the original earthquakes swarm that started in early October in Esjufjöll volcano.

Like before it appears that the earthquakes have there origin, not tectonic as often is the case is in Iceland. But this means that each time a earthquake happens in Esjufjöll volcano a magma is on the move there. What is interesting about this is the fact the magma that is moving inside Esjufjöll volcano does appears to be moving at fast rate. For instance the earthquakes that are now taking place in Esjufjöll volcano indicate that the magma is moving faster then was the case with Eyjafjallajökull volcano before it erupted earlier this year. According to Week 42 data from Icelandic Met Office there where over 70 earthquake recorded. But in 2002 the earthquakes recorded then was over 90 earthquakes, with the biggest one ML3,5 in size.

The current earthquakes in Esjufjöll volcano are interesting and do signal a more active period ahead in that volcano. When that active period is going to peak with a eruption (?) is unknown at this time. But we at least might end up seeing (?) something like happened in the year 1927 when a small eruption did create a glacier flood from Esjufjöll volcano that did go down Breiðamerkujökull glacier.

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Op donderdag 18 november 2010 13:06 schreef Frutsel het volgende:
KABOEM!

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Donderdag..Tijd.........Breedte...Lengte..diepte..kracht..%zeker..............locatie
18.11.2010..08:01:51..65,082......-16,247.....6.2 km...0,7......99,0......4.6 km N Upptyppingum
Donderdag
18.11.2010..07:31:13..65,080......-16,252.....6.8 km...0,6......99,0......4.3 km N Upptyppingum
Donderdag
18.11.2010..06:38:20..65,071......-16,253.....9.1 km...0,6......99,0......3.4 km N Upptyppingum
Donderdag
18.11.2010..06:11:29..65,082......-16,241.....6.8 km...0,7......99,0......4.6 km N Upptyppingum
Donderdag
18.11.2010..00:54:18..65,084......-16,240.....6.4 km...0,9......99,0......4.8 km N Upptyppingum
Donderdag
18.11.2010..00:41:35..65,069......-16,268.....7.9 km...0,5......99,0......3.2 km NNW Upptyppingum
Donderdag
18.11.2010..00:35:15..65,062......-16,275.....8.5 km...0,4......99,0......2.6 km NNW Upptyppingum
Woensdag
17.11.2010..11:38:05..65,098......-16,228.....5.5 km...0,6......99,0......6.5 km N Upptyppingum
Dinsdag
16.11.2010..20:51:37..65,086......-16,241.....8.5 km...0,5......99,0......5.0 km N Upptyppingum

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Op donderdag 18 november 2010 13:41 schreef Frutsel het volgende:
Niet om je te teleurstellen, maar is het niet zo dat we dit pas zijn gaan volgen na de eyfrutseljoekel vulkaan plofte?

Zijn die bevingen niet "normaal".. en waren ze er altijd al maar zijn ze ons nooit opgevallen?

SPOILER

Om spoilers te kunnen lezen moet je zijn ingelogd. Je moet je daarvoor eerst gratis Registreren. Ook kun je spoilers niet lezen als je een ban hebt.

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Op donderdag 18 november 2010 13:55 schreef Frutsel het volgende:

[..]



Het zijn net de nummers van Lost

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De getallen 4, 8, 15, 16, 23 en 42 spelen een belangrijke rol in de serie, zowel vóór de crash als op het eiland zelf.

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Op vrijdag 19 november 2010 01:21 schreef Isiolo het volgende:
Ik zet nog altijd mijn geld op nummer 12

Binnen een jaar....

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Earthquakes in eastern part of Katla volcano (Mýrdalsjökull)
Posted on November 19, 2010 by Jón Frímann
Last week something interesting started to happen in Katla volcano last week (Week 45). Earthquakes started to appear in the eastern part of the Katla volcano. This is higly unusual and is not the normal earthquake zone in Katla volcano. But normally the earthquakes take place in the western part of the Katla volcano (Goðabungu area) and few earthquakes take place in the caldera it self at regularly.

At 00:45 UTC there was a earthquake in eastern Katla volcano, the automatic SIL size of this earthquake was ML2,5 at the depth of 1,1Km (with a good quality of 90,05). Both figures are subject to a revision by a seismologist at later time, so both size and depth can change. I did manage to record this earthquake on my Hekla geophone, even if there currently is rather high wind noise at my geophone. What I did see on my geophone is interesting. But the earthquake appears to have low frequency component in it, even if it is mostly high-frequency type of earthquake. But those earthquakes are normally created by a fault in the crust, not by magma movement.

I need more data to confirm it. But there are clues that the earthquakes in eastern Katla volcano are due to magma movement, rather then tension changes in the crust not related to magma movement. What is happening there is unclear at the moment, as GPS stations around Katla volcano do not show anything interesting at the moment.

No eruption is imminent in Katla volcano at current time.

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Op zondag 28 november 2010 21:37 schreef Frutsel het volgende:
[ afbeelding ]

[..]

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Op zondag 28 november 2010 22:51 schreef Isiolo het volgende:
vlakbij de Askja

Hoogte : 1516m
Type : Stratovulkaan
Laatste uitbarsting : 1961

Askja is een grote basaltische centrale vulkaan, welke het Dyngjufjöll massief vormt. Het wordt doorsneden door drie overlappende calderas. De grootste hiervan heeft een doorsnede van 8 Km en is mogelijk ontstaan door een ringvormige subglaciale uitbarsting.
Een grote explosieve uitbarsting van Dyngjufjöll ongeveer 10.000 jaar geleden wordt in verband gebracht met de vorming van deze caldera. Veel postglaciale uitbarstingen hebben veelal langs de rand van deze caldera plaatsgevonden.
Een grote explosieve uitbarsting aan het zuidoostzijde van de caldera in 1875 was één van IJslands grootste in de historie van IJsland. Resultaat was de vorming van een kleinere caldera met een doorsnede van 4.5 Km, welke nu gevuld is met het meer Öskjuvatn.
Het 100 Km lange gebied van scheuren, dat zich ook uitstrekt over Sveinagja wordt gezien als onderdeel van het Askja vulkanisch systeem, evenals een aantal kleinere schildvulkanen, zoals de Kollatadyngja.
Uitbarstingen in de 20-ste eeuw hebben lavastromen geproduceerd vanuit scheuren nabij het meer Öskjuvatn.

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Op zondag 28 november 2010 22:59 schreef Isiolo het volgende:
kijk elke dag wel eens op de kaartjes...
maar deze zijn opvallend bij elkaar...

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Op dinsdag 30 november 2010 20:29 schreef Isiolo het volgende:
BREAKING !

De nieuwste vulkaan in het IJslandse nieuws is de Krisuvik-vulkaan. Op dit moment rijst het gebied, net zoals in 2009 (toen 3 cm), Dit gaat gepaard met micro-aardbevingen. Daarna is het gebied weer iets ingezakt, maar nu is er weer sprake van rijzen/uitzetten. Mogelijk komt dit door het volstromen van een magmakamer op 3-4 km diepte. Gevolgen hiervan kunnen zijn: nieuwe hete bronnen, en een plotseling verhevigde activiteit van bestaande bronnen. De "Icelandic Civil Protection Authorities" zijn gewaarschuwd, en deze houden het gebied nu intensiever in de gaten. Ook zijn twee extra GPS-stations geplaatst. Weliswaar wordt er nog geen uitbarsting verwacht, maar uitbarstingen als deze kunnen plotseling en zonder waarschuwing vooraf ontstaan. De Krisuvik-vulkaan barstte voor het laatst uit in 1340.

[..]

tot zover het goede nieuws van vandaag

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Op woensdag 1 december 2010 11:42 schreef Frutsel het volgende:
Topic nr 17 wordt dus Krisisvolle Krisuvik ofzo?

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Op woensdag 1 december 2010 11:53 schreef Frutsel het volgende:
Het gaat nu gewoon langzamer met al die ontploffende vulkanen enzo

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Op zondag 5 december 2010 22:36 schreef Jumparound het volgende:

[..]

maar is dit veel, in historisch perspectief?

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Signs that a eruption in Grímsfjall volcano might be close
Posted on December 8, 2010 by Jón Frímann
Over the past two weeks there have been signs appearing that a eruption might be close in Grímsfjall volcano. But a GPS station named Skrokkalda. This GPS station has started to move north, but this indicates that inflation has started in Grímsfjall volcano at full power. This did also happen at the same GPS station in 2004 before the eruption in Grímsfjall volcano that same year. But it is debated if this movement was created by ice or by a dike intrusion in Grímsfjall volcano. It is my just my personal opinion on this movement that takes place at the GPS station.

It currently remains to be seen if this northerly movement continues or if it starts to deflate again. So far this is the only indicator that Grímsfjall volcano is getting ready for a eruption. When this did happen in the year 2004 it was almost three weeks after this process started until a eruption took place. But then a glacier flood did trigger the start of the eruption in the year 2004.

For the moment the only thing to do is to wait and see what happens with Grímsfjall volcano. Nobody can tell how long the wait is going to be.

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There has been some seismic activity in the area lately but earth scientists are not concerned that it might lead to volcanic eruptions, visir.is reports.

According to recent reports, rumbling can still be heard in Eyjafjallajökull on occasion, but that is not considered an indication that the eruption, which ended last summer, is resuming.

Scientists have speculated that the eruption in Eyjafjallajökull might trigger an eruption in the bigger volcano Katla, which lies underneath the neighboring Mýrdalsjökull icecap, but there have been no signs of an upcoming eruption there either.

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Op zaterdag 22 januari 2011 19:44 schreef Isiolo het volgende:

[..]

bron ijsland-enzo

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Op zondag 23 januari 2011 12:16 schreef DemonRage het volgende:

[..]

Die discussie over een Nederlands woord "aarsspuiten". Nooit van die term gehoord.

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Op woensdag 26 januari 2011 18:38 schreef DemonRage het volgende:
Die van dinsdag is bijgesteld naar 2.6, vanochtend weer zoëen op ongeveer dezelfde plek maar dan aan de oppervlakte. Het zal de gletsjer zelf wel zijn.

Wednesday
26.01.2011 07:10:20 64.505 -17.671 0.1 km 2.5 99.0 6.9 km ENE of Hamarinn
Tuesday
25.01.2011 18:56:41 64.515 -17.674 2.6 km 2.6 99.0 7.2 km ENE of Hamarinn

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Op donderdag 27 januari 2011 00:41 schreef zenkelly het volgende:
Die Krysuvik is zich idd ook aardig aan het roeren de laatste tijd. Wat zegt de diepte en hoeveelheid van de bevingen over een evt. verwachte uitbarsting?

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Op vrijdag 28 januari 2011 19:24 schreef DemonRage het volgende:
2 metingen in de buurt van Katla:

[ code verwijderd ]

1 seconde verschil.

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Legende over de naamgeving

Katla was de naam van een boosaardige werkneemster, een berucht persoon in de wijde omgeving. Ze was in het bezit van een speciale broek, die de eigenschap had dat iedereen die hem aan had eindeloos kon rennen zonder vermoeid te raken. Op een bepaalde dag in de herfst bemerkte Katla dat de herdersjongen Bardi de broek gestolen had om hem te helpen bij het bijeenzoeken van de los lopende schapen in de heuvels. Als straf verdronk Katla hem in een bak met wei. Toen de winter naderde, en de wei op begon te raken, hoorde Katla een stem die haar meedeelde dat Bardi weldra zou verschijnen. Toen Bardis geest inderdaad weer opdook, trok Katla haar speciale broek aan, rende de Myrdalsjökull op en wierp zich in een ijsspleet. Deze 5 kilometer lange kloof staat nog steeds bekend als Kötlugjá (Katlas kloof). Zij is nooit weer gezien. Kort nadat zij verdwenen was kwam de vulkaan onder de gletsjer tot uitbarsting, daarbij een vloedstroom veroorzaakte die over de laag gelegen gebieden kolkte en meerdere nederzettingen verwoestte en de spoelzandvlakte Mýrdalssandur achterlatend. De vulkaan herinnert ons elke 80 jaar aan haar sinister verleden met een uitbarsting die meestal in de herfst plaatsvindt.

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Een deel van de spleet ligt onder de gletsjer Vatnajökull en de totale lengte is dus niet bekend. Gedurende de 9 maanden durende uitbarsting, van 8 juni 1783 tot 7 februari 1784, werd een oppervlak van 565 km² met een meters dikke laag lava bedekt. Bovendien kwamen er enorme hoeveelheden giftige fluor- en zwavelhoudende gassen vrij waardoor bijna driekwart van het vee op IJsland stierf.
...
Ten gevolge van deze eruptie was het noordelijk halfrond in een waas van mist gehuld, waardoor de temperatuur het volgende jaar wereldwijd met ongeveer 1 graad Celsius daalde, en er zure regen en misoogsten ontstonden.
In de warme zomer van 1783 waaide de wind geruime tijd naar het zuidoosten, waardoor een wolk met zwaveldioxide en zwavelzuur zich over West-Europa verspreidde, zover landinwaarts als Praag. Men schat dat alleen al in Groot-Brittannië 23.000 mensen overleden door de gifwolk

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Katla:
Something happened with that last quake in Katlas south-boundary of the caldera.
Slight increase in Godabunga, but more on Snaebyli and Lagu-Hvolar.

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And now Hekla tries to convince us that it is a beating heart. About one pulsed double-transient (red moving inversely to the others) per hour.

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00:05:46 64,682 -17,361 1,4 km 3,1 90,06 9,2 km ANA af Bárðarbungu

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Op woensdag 2 februari 2011 11:58 schreef Roel_Jewel het volgende:

[..]

Nu twee zelfs.

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Op woensdag 2 februari 2011 17:03 schreef Light het volgende:

[..]

Die gifwolk nam niet eens de kortste weg van IJsland naar GB, uit m'n hoofd ging dat via oa. Bergen (Noorwegen), Praag, Berlijn en Parijs naar Engeland.

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Op donderdag 3 februari 2011 13:20 schreef zenkelly het volgende:
http://en.vedur.is/earthquakes-and-volcanism/earthquakes/vatnajokull/
Grimmsfjall
En de Godabunga (tusen Katla en Eyjafjalljokull???)
http://hraun.vedur.is/ja/oroi/allarsort.html

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Fimmtudagur
03.02.2011 01:11:29 64,741 -17,245 5,0 km 1,6 64,86 4,8 km SSV af Kistufelli
Fimmtudagur
03.02.2011 00:59:28 64,732 -17,283 5,5 km 2,6 68,2 6,5 km SSV af Kistufelli
Fimmtudagur
03.02.2011 00:56:53 64,764 -17,266 1,1 km 3,3 90,05 3,3 km SV af Kistufelli
Fimmtudagur
03.02.2011 00:13:50 64,746 -17,262 4,9 km 2,4 64,85 4,6 km SSV af Kistufelli
Fimmtudagur
03.02.2011 00:10:29 64,735 -17,244 4,4 km 2,2 90,01 5,4 km SSV af Kistufelli

Lijkt het onrustig in IJsland? Of kunnen we rustig blijven slapen(de vulkanen dus ook)?

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Op donderdag 3 februari 2011 15:11 schreef zenkelly het volgende:
Spannend!!!

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Zijn er ergens nog archieven van deze heftige veranderingen voordat de Eyjadinges uitbarstte of kan ik dat hier ergens op het topic vinden?

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Op donderdag 3 februari 2011 15:44 schreef zenkelly het volgende:
Jij bent sneller dan de vulkanen...
thnx! We w8en af......

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Op zaterdag 5 februari 2011 00:59 schreef zenkelly het volgende:
Grimsvotn????

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En Kahaarin, wat zegt dat...die plaats wisseling van kleuren in de grafiek??

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Op zondag 6 februari 2011 12:31 schreef DemonRage het volgende:
En dit was de laatst gemeten:
06.02.2011 10:59:35 64.831 -17.282 29.5 km 1.7 31.71 6.6 km NNW of Kistufell

Behoorlijk diep (maar niet accuraat)

Oh... is alweer bijgesteld:
06.02.2011 10:59:35 64.759 -17.269 8.3 km 1.1 99.0 3.8 km SW of Kistufell

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Op zondag 6 februari 2011 18:26 schreef Frutsel het volgende:

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*thnx *

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Geologist worry about earthquake activity in Kistufell field (Bárðarbunga volcano)
_{Posted on February 6, 2011 by Jón Frímann}
In my last blog post I did tell the news about the possibility about a eruption in the Kistufell volcano field. But that field is a part of Bárðarbunga volcano system and has a lot of earthquake activity since the beginning of earthquake recording in Iceland.

In the tonight news on Rúv about this area, Páll Einarsson geologist at University of Iceland says in the news on Rúv that there is a good reason to worry about this area. As it is one of the most active one in Iceland, but it is directly above the mantle plume under Iceland. Páll Einarsson also says in the news on Rúv that before the eruption in the year 1996, that took place in a volcanic ridge now named Gjálp there was a increase in earthquake activity in Kistufell field.

But due to continues earthquake activity there is it hard to know what is exactly going on there. Páll Einarsson also says in the news on Rúv that it is a problem that this area of Iceland lacks the proper coverage with seismometers. But they are few in this area and that makes it harder to detect the depth and the location of the earthquake that take place in this area of Iceland.

After the Eyjafjallajökull volcano eruption in the year 2010. It seems that geologist in Iceland take earthquake swarms more seriusly then they did before. As they did learn from Eyjafjallajökull volcano eruption that not all volcano start with few earthquakes just before they erupt, as is common with few volcanoes in Iceland.

The news from Rúv on this matter. Use Google Translate to understand.

Full ástæða til að hafa varann á (Rúv.is)

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RIFT VOLCANOES
Rift volcanoes form when magma rises into the gap between diverging plates. They thus occur at or near actual plate boundaries. Measurements in Iceland suggest that the separation of plates is a continuous process but that the fracturing is intermittent, analogous to a rubber band that is slowly stretched until it snaps. Earthquake swarms and volcanic eruptions occur when the stretching exceeds the strength of the near-surface rocks, which then fracture along steeply dipping cracks parallel to the rift. Basaltic magma rising along these fractures causes Icelandic-type fissure eruptions.

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Op zondag 6 februari 2011 22:30 schreef SpeedyGJ het volgende:
Als heel IJSland nou eens bom

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Renewed Tremors in Icelands Vatnajökull
Seismic activity was detected in the northwestern part of Vatnajökull glacier over the past few days and there is full reason to be on the alert, according to geology professor Páll Einarsson. More earthquake sensors are needed, he said.

^{Vatnajökull. Photo by Páll Stefánsson.}
The series of earthquakes occurred close to Kistufell and Bárdarbunga, which are among the most geologically active areas in the country, ruv.is reports.

A few systems come together there. The largest is the Bárdarbunga system, which includes Veidivötn and Vatnaöldur and stretches way north of Dyngjujáls and west of Askja. Then there is the Grímsvötn system which lies further to the east, Einarsson explained.

He said Bárdarbunga itself and a fissure swarm to the northeast of it seem to be the most active right now. Seismic activity has in fact been ongoing in the area since sensors were first placed there, peaking before the volcanic eruption in Gjálp in 1996.

However, it is difficult to tell whether the tremors that are occurring now are a consequence of that eruption or whether another eruption might be coming up.

We need better sensors there. For example, it is difficult to measure the depth of the earthquakes in the area because sensors in the network in the center of the country are lacking. They would pick up movements in the earths crust, as a large part of the area is covered by a glacier, Einarsson said.

It is indisputable that the seismic activity is growing steadily in the areathe series of earthquakes over the past few days is an indicator of that. There is full reason to be on the alert. This is one of the most active areas in the country, he iterated.

According to visir.is, several earthquakes were measured by Bárdarbunga on Saturday night, the strongest of which was 2.6 points on the Richter scale.

Almost 40 earthquakes have been measured in the area in the past few days, culminating with an earthquake which was 3.4 points on the Richter scale in strength.

However, there are no indications of an immediate eruption and according to the latest news on visir.is, the tremors have subsided for now. Yet scientists expect an eruption in Vatnajökull in the near future, possibly by the end of this year.

The earthquakes are still at a considerable depth; the risk of an eruption grows the closer the tremors are to the surface.

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Fairly Strong Earthquakes Hit Icelands Largest Glacier
Two earthquakes were recorded in Mt. Grímsfjall by the Grímsvötn lakes on the Vatnajökull icecap, the largest glacier in Europe, this morning, measuring 4.2 and 3.5 on the Richter scale.

^{Grímsvötn. Photo by Páll Stefánsson.}
These are probably the strongest earthquakes to hit in this area since 1934. Experts at the Icelandic Meteorological Office are currently reviewing data to see whether this is the case, visir.is reports.

The earthquake that hit in 1934 measured 4.5 points on the Richter scale in strength and led to a volcanic eruption.

Stronger earthquakes have hit Vatnajökull since but by Bárdarbunga in the glaciers northwestern part. Grímsvötn are located in the western part of the glacier.

Grímsvötn flooded late last year which was thought to be an indicator of an upcoming eruption. However, no eruption took place at that point.

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Op maandag 7 februari 2011 21:43 schreef Keiichi het volgende:
Maar die hele grote aardbevingen zie ik nergens terug op de kaart.

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06.02.2011 07:51:25 64.689 -17.020 1.1 km 3.3 90.01 13.6 km SE of Kistufell
Sunday

06.02.2011 01:07:12 64.674 -17.131 4.6 km 3.1 67.93 12.4 km SSE of Kistufell
Sunday

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Op woensdag 9 februari 2011 10:29 schreef Jumparound het volgende:

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De "het-hangt-van-de-windrichting-af-of-de-europese-luchtvaar-naar-de-klote-gaat-vulkaan" dus

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Op woensdag 9 februari 2011 13:06 schreef Light het volgende:

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Even de naam van de gletsjer verbeterd

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Op woensdag 9 februari 2011 18:01 schreef DemonRage het volgende:

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Jij weer!

't gaat nu over Bardarbunghole.

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Die tremormetingen zijn van Grimsfjall (bij de Grimsvötn vulkaan).

En als ik op dit kaartje kijk:
http://www.volcanodiscovery.com/iceland.html

Dan zie je 2 vulkanen gekleurd: Katla (geel) en Grimsvötn (oranje)

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Many tephra layers originally thought to belong to other volcanoes have in the recent studies proved to be from Bárðarbunga. The Gjálp eruption in 1996 revealed that an interaction may be between Bárðarbunga and Grímsvötn. A strong earthquake in Bárðarbunga, about 5 on the Richter, is believed to have started the eruption in Gjálp.

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Op woensdag 9 februari 2011 18:14 schreef DemonRage het volgende:

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Lekker is dat... de grootste en gevaarlijkste vulkanen van IJsland die onrustig zijn.

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Op woensdag 9 februari 2011 20:02 schreef DemonRage het volgende:

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Als het hele scheurenstelsel erbij openbarst dan euhmm... zoiets:
[ afbeelding ]

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Op vrijdag 11 februari 2011 20:53 schreef Isiolo het volgende:
Bijzonder veel seismische activiteit in IJsland vandaag

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Eartquake swarm in Hengill volcano
^{Posted on February 11, 2011 by Jón Frímann}
The Icelandic volcano known as Hengill did have a minor earthquake swarm of 20 something earthquakes today. This earthquake swarm might be related to geothermal power plant activity nearby (by pumping down or up water in the area). But at the moment I do not have it confirmed and this has also not been confirmed by the news.

This earthquake swarm in this area is normal and this volcano has several every year as it located on the main rift zone in Iceland. The last large earthquake swarm in this volcano took place during the year 1997 to 2000. Then many earthquake up to size Mb5.0 took place in Hengill volcano.

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The massive subglacial Prestahnukur volcano at the SW end of the Langjökull icecap has associated rift zones to the north and SW that have erupted during the past 10,000 years.

Kaart

Hot springs are associated with the rhyolitic Prestahnukur central volcano. The classic Icelandic shield volcano Skjaldbreidur was formed at the southern end of the Prestahnukur volcanic system, between Thorsjökull glacier and Thingvallavatn lake. The broad, low-angle shield volcano produced 17 cu km of basaltic lava flows during the early Holocene.

Shield volcano (subglacial) 1390 m (4,560 ft) (?)
SW Iceland, 64.60°N / 20.58°W
Current status: (probably) extinct (0 of 5)
Typical eruption style: Effusive (lava flows).
Eruptions from Prestahnukur: none during historic times, last eruption radiocarbon-dated at 7550 BC +-500 years
---
Source: GVP, Smithsonian Institute

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Op zaterdag 12 februari 2011 13:44 schreef lipjes het volgende:
is er meer data over bekend zoals VEI kracht oid?
zijn er tevens ook tremormetingen bekend?

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Op zaterdag 12 februari 2011 20:18 schreef Isiolo het volgende:
Ik ben helemaal opgewonden

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Op zaterdag 12 februari 2011 20:32 schreef 22 het volgende:
Hoe moet ik die tremormetingen lezen?
Waar moet ik op letten?

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Op vrijdag 25 februari 2011 09:15 schreef zenkelly het volgende:

[..]

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A ML3.3 earthquake in Grímsfjall volcano
_{Posted on February 25, 2011 by Jón Frímann}
A earthquake with the size of ML3.3 took place at 01:19 UTC in Grímsfjall volcano. At the current moment no other earthquakes have been spotted following this single event. It is also remains unclear at the moment if this is a start of a eruption in Grímsfjall volcano. But at the moment there is nothing that indicates that a eruption is about to start in Grímsfjall volcano. But that can change with out any warning at all.

Note that EMSC is reporting this earthquake with the size of ML4.3. It is unclear at the moment what is the correct size for this earthquake.

Text updated at 11:40 CET on the 25th of February 2011. EMSC did change it down to ML3.3 size.

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Op vrijdag 25 februari 2011 12:34 schreef zenkelly het volgende:
Het is weer bijna weekend ...

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Op zondag 27 februari 2011 14:24 schreef zenkelly het volgende:
Ja, ik had t ook al opgemerkt! Spannend! Loos alarm of niet?

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Op zondag 27 februari 2011 14:52 schreef zenkelly het volgende:

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Plus de 'swarm' die de afgelopen dagen al heeft plaatsgevonden! Daarmee wordt de score van bevingen nóg hoger!

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Jon Friman