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Posts Tagged ‘Krafla’

The Next Icelandic Volcano Likely to Erupt

Posted by feww on April 22, 2010

A Probability Analysis of the Icelandic Volcano Most Likely to Erupt Next

The pattern of seismicity in Iceland has remained almost unchanged from two days ago, while the eruption at Eyjafjallajökull has become less explosive.

Loads of magma seem to be flowing under the land of Ice and Fire [Iceland,] but where is it all going?

In Iceland’s Bárdarbunga May Be Erupting posted on April 20,2010, Fire Earth Moderators said they believed Iceland’s Bárdarbunga May Be Erupting or is about to Erupt.

Seismic events occurring between Apr 18 – 20,2010

Source: Iceland Met Office. © Veðurstofa Íslands

Seismic events occurring between Apr 20 – 22,2010

Source: Iceland Met Office. © Veðurstofa Íslands

The moderators have now allocated the following probabilities of eruption to each of the volcanoes/volcano groups previously listed:

  1. Probability of a second Icelandic volcano erupting this year: > 80 percent
  2. Kolbeinsey ridge (Last erupted: 1999) or a new submarine fissure in its vicinityprobability of eruption: 80 percent
  3. Krafla (1984)/ Theistareykjarbunga (< 1000 BC)/ Tjörnes fracture zone (1868) – probability of eruption: 52percent
  4. Askja (1961) – probability of eruption: 66 percent
  5. Bárðarbunga (1903) and neighboring Grímsvötn (2004) – probability of eruption: 84 percent
  6. Grímsnes (> 3500 BC) – 40 percent
  7. Reykjanes (1879) – 50 percent
  8. Eyjafjallajökull – probability that the current round of eruption would last more than 30 days: 34 percent
  9. Katla – probability of eruption: 64 percent
  10. Other Icelandic volcanoes not mentioned on this list: probability of eruption: less than 40 percent


A Map of Iceland Volcanoes. Click image to enlarge.

Bárdarbunga, one of the most active volcanoes in Iceland, is a massive volcano with a  700-m-deep caldera which lies beneath the NW Vatnajökull icecap.  A fissure eruption at Thjorsarhraun produced about 21 km³ of lava, the largest known Holocene lava flow on the planet.

Powerful eruptions may occur among the volcanoes lying along the Mid-Atlantic Ridge. The plate tectonics could also translate into increased seismicity along the divergent plate boundary and boundaries of neighboring plates.

Related Links

Serial No 1,607. Starting April 2010, each entry on this blog has a unique serial number. If any of the numbers are missing, it may mean that the corresponding entry has been blocked by Google/the authorities in your country. Please drop us a line if you detect any anomaly/missing number(s).

Posted in Eyjafjallajökull eruption, Grímsnes, Katla volcano, Reykjanes, volcano | Tagged: , , , , , , , | 10 Comments »

Iceland’s Bárdarbunga May Be Erupting

Posted by feww on April 20, 2010

Fire Earth Moderators Believe Iceland’s Bárdarbunga May Be Erupting or is about to Erupt.

If our long-distance assessment is correct, the next eruption at Bárdarbunga/ Grímsvötn or any of the other 6 volcanoes listed below could spell a major disaster for Iceland.

Iceland seismic record for the past 48 hours shows 7  separate cluster of quakes in the vicinity of the following volcanoes (See image below)

  1. Kolbeinsey ridge (Last erupted: 1999)
  2. Krafla (1984)/ Theistareykjarbunga (< 1000 BC)/ Tjörnes fracture zone (1868)
  3. Askja (1961)
  4. Bárðarbunga (1903) and neighboring Grímsvötn (2004)
  5. Grímsnes (> 3500 BC)
  6. Reykjanes (1879)
  7. Eyjafjallajökull (Currently ongoing)

Bárdarbunga, one of the most active volcanoes in Iceland, is a massive volcano with a  700-m-deep caldera which lies beneath the NW Vatnajökull icecap.  A fissure eruption at Thjorsarhraun produced about 21 km³ of lava, the largest known Holocene lava flow on the planet.

Powerful eruptions may occur among the volcanoes lying along the Mid-Atlantic Ridge. The plate tectonics could also translate into increased seismicity along the divergent plate boundary and boundaries of neighboring plates.



Source: Iceland Met Office. © Veðurstofa Íslands


Original Caption:  Map showing the Mid-Atlantic Ridge splitting Iceland and separating the North American and Eurasian Plates. The map also shows Reykjavik, the capital of Iceland, the Thingvellir area, and the locations of some of Iceland’s active volcanoes (red triangles), including Krafla.

The consequences of plate movement are easy to see around Krafla Volcano, in the northeastern part of Iceland. Here, existing ground cracks have widened and new ones appear every few months. From 1975 to 1984, numerous episodes of rifting (surface cracking) took place along the Krafla fissure zone. Some of these rifting events were accompanied by volcanic activity; the ground would gradually rise 1-2 m before abruptly dropping, signaling an impending eruption. Between 1975 and 1984, the displacements caused by rifting totaled about 7 m.  Source: USGS.


Original Caption: Aerial view of the area around Thingvellir, Iceland, showing a fissure zone (in shadow) that is an on-land exposure of the Mid-Atlantic Ridge. Right of the fissure, the North American Plate is pulling westward away from the Eurasian Plate (left of fissure). This photograph encompasses the historical tourist area of Thingvellir, the site of Iceland’s first parliament, called the Althing, founded around the year A.D. 930. Large building (upper center) is a hotel for visitors. (Photograph by Oddur Sigurdsson, National Energy Authority, Iceland. Source: USGS.

Continued …

Related Links – Fire-Earth entries on Eyjafjallajökull and other useful  sources:

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Serial No 1,597. Starting April 2010, each entry on this blog has a unique serial number. If any of the numbers are missing, it may mean that the corresponding entry has been blocked by Google/the authorities in your country. Please drop us a line if you detect any anomaly/missing number(s).

Posted in Bárdarbunga volcano, Mid-Atlantic Ridge, North American plate, rifting, Thingvellir | Tagged: , , , , | 15 Comments »