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16 October 2011

Vleeptron warned you months ago -- here comes KATLA, the REALLY BIG Iceland volcano! Flee for your lives! Kiss your ass goodbye!


Restless Katla Volcano Heightens Fears Of Possible Eruption

By Mark Dunphy - Sun Oct 16, 1:17 am
Mýrdalsjökull glacier in Iceland. Image Chris 73 - Wikimedia Commons
Mýrdalsjökull glacier in Iceland. Image Chris 73 - Wikimedia Commons
An increase overnight of seismic actvity in the vicinity of the Katla volcano in southern Iceland has heightened fears of a possible eruption.
Katla is located on the Mýrdalsjökull glacier, which is the southernmost glacier in Iceland and is almost 600 km2. It is situated to the north of Vík í Mýrdal and to the east of the smaller glacier Eyjafjallajökull, where an eruption in 2010 caused major disruptions to air traffic throughout western and northern Europe in April and May 2010.  The caldera is 10 km (6 mi) diameter and is covered with 200–700 metres (660-2,300 ft) of ice.
Sixteen eruptions have been documented at Katla between 930 and 1918 at intervals of 40–80 years. It has not significantly erupted for 93 years, although there may have been small eruptions that did not break the ice cover in 1955 and 1999.  The 1918 eruption resulted in extending the southern coast by 5 km due to laharic flood deposits.
In the early hours of today, 05 October, an intense swarm of earthquakes was registered in the Katla caldera; the largest of these earthquakes had a local magnitude of ~3.7. Most of the ongoing seismicity is sourced at shallow (< 5 km) depths.
Commenting before the latest (14-15 Oct., 2011) earthquake swarm, the IMO said there were no measurable signs that an eruption of Katla was imminent.
“However, given the heightened levels of seismicity”, the IMO added, “the situation might change abruptly. Monitoring teams at IMO are following the ongoing activity closely, and sensor-based networks around the volcano ensure that all seismological, geodetic, and hydrological changes are detected.”
“It is definitely showing signs of restlessness,” commented Pall Einarsson, a professor of geophysics at the University of Iceland.
According to Jón Frímann, the author of the popular Icelandic volcano and earthquake website: “Earthquake activity continues in Katla volcano as before. Most of the earthquakes are as before just small ones. Currently the earthquakes do not appear to be from dike intrusion as happened last week (5 October, 2011… After this large earthquake swarm, activity dropped considerably but it has been picking up again slowly during the week. But earthquake observation has been difficult due to frequent storms during the past two weeks that have been passing over Iceland.”
Earthquakes during the last 48 hours.  Image IMO. Click image for IMO website
Earthquakes during the last 48 hours. Image IMO. Click image for IMO website
A glacial flood or jokulhlaup from the Katla volcano badly damaged a bridge leading to the closure of a busy road on Saturday, 09 July last. Iceland’s Civil Protection Agency (CPA) said flooding took place near the volcano, most likely caused by the melting of its ice cap.  An aerial observation of the Mýrdalsjökull at the time reported cracks in two calderas in the southernmost part of the glacier.
In recent weeks residents of Vik (population 300 approx.), located at the foot of Katla, have participated in emergency evacuation drills in the event of a volcanic eruption and subsequent glacial floods  affecting the small coastal town.
Vik, Iceland. Image Progresschrome
Vik, Iceland. Image Progresschrome
Locations of caldera rim and previous eruptions. Image RicHard-59
Locations of caldera rim and previous eruptions. Image RicHard-59
The eruption of Katla in 1918
The eruption of Katla in 1918
Meanwhile, an earthquake swarm has also been detected at the Askja volcano, which is situated in a remote part of the central highlands of Iceland.
Experts say an eruption is not imminent but that pressure is continuing to build beneath the volcano.  Askja was virtually unknown until the tremendous eruption which started on March 29, 1875. It last erupted in 1961.
The most significant, recent earthquake (3.9 magnitude) to hit Iceland occurred at 01:16 AM on Sunday 16 October. The epicentre was located 37 km S Grindavík; 67 km SW Hafnarfjörður; and 75 km SW Reykjavík.
Meanwhile, a 3.8 magnitude earthquake was recorded at 10:46AM GMT on Saturday (15 Oct), according to the EMSC. It struck 12 km NW Hveragerði; 25 km E Reykjavík; and 25 km E Kópavogur.

 Earthquake Swarms

Earthquake swarms are events where a local area experiences sequences of many earthquakes striking in a relatively short period of time. The length of time used to define the swarm itself varies, but the United States Geological Survey (USGS) points out that an event may last for days, weeks, or months.

Harmonic Tremors

Harmonic tremor describes a long-duration release of seismic energy, with distinct spectral (harmonic) lines, that often precedes or accompanies a volcanic eruption. More generally, a volcanic tremor is a sustained signal that may or may not possess these harmonic spectral features.


Tremor activity – Icelandic Meteorological Office
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Comments 1 - 9 of 9First« PrevNext »Last
  1. 0
    Nice :))
  2. +1
    Thanks for the update!
    From Jón Frímann today also
    For the moment it is hard to know what happens next in Katla volcano or in Askja volcano. But it is clear that Askja volcano is preparing for a eruption (along with Kverkfjöll volcano). It is clear that Katla volcano is continuing to prepare for a eruption. But it is impossible to know when and how big that eruption might be. Until a eruption takes place, more dike intrusions with following earthquake swarms should be expected in Katla volcano.
  3. -1
    Not quite! I’ve read those reports too – in multiple sources over past weeks and MONTHS!
    There are other sites in addition to IWO that report on Katla and the Icelandic Met Office provide excellent information on seismic activity. This report was based on Earthquake swarms from Oct 5th which, if not already reported here, were reported on other sites where I have read the reports. IWO is a great source of information on various topics collated from various sources – very useful.
  4. +1
    Hello Joe. Yes of course. But you remember that information is only old to those who have access to other sources. For many people this information is new. Like information about today’s swarm and earthquake in west. Also Jon’s commentary
  5. +1
    Iceland has always been extremely seismically active. Eruptions in 2010 and 2011 just made us all a little more conscious of the potential negative effects for those outside the country. Hope this one doesn’t go though. Seems to be a lot of pressure building up.
  6. 0
    Wow, All be careful Sharing
  7. 0
    I felt the earthquake from Saturday. They are quite common along this region. The activity at Katla is interesting and worrying but we do not fear an eruption will take place soon. An eruption is long overdue suffice to say
  8. +2
    I must say Joe that while people of this country in Iceland know that an eruption might not taking place today or tomorrow we are aware of the volcano and it might erupt soon. All news on the volcano is important. Thank you for this website and the information. Also Jón Frímann has excellent knowledge of the siuation and his website is read by people around Iceland and the world
  9. 0
    October 5th news re-posted 15th? Was hoping for something more “current” from IWO! Sometimes I suspect these re-posts are to generate site attractions rather than deliver up-to-date news!!! C’mon Mark! ;-)
    A few tremors and while threat remains nothing recent to suggest an imminent eruption it seems. Icelandic officials seem to be at some odds with other scientists quoted on the web in that, while not dismissing risk of eruption, it doesn’t appear to be so imminent as non-local scientists quoted by journos would have you believe in their reporting.
    Whenever it happens…it’s not to be welcomed given the disruption from last volcano.
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