Vulkanen IJsland #16 met een Grimmige Grimsvotn.

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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.