Increasing number of earthquakes at Katla ?
Update Thu 23 Aug 20:30
To watch out for, when trying to anticipate a new eruption, would be earthquake swarms at some depth (5-20 km) that become shallower.
Small earthquake swarm at Katla
Update Fri 17 Aug 18:53A small swarm of quakes has been going on at Katla since yesterday. So far, 10 quakes have occurred today, including a M2.8 quake at 1.8 km depth 6.8 km E of Goðabunga.
Slightly elevated number of quakes under Katla
Update Sun 12 Aug 17:42In recent days, the number of quakes has been slightly elevated at Katla.
Weak seismic swarm on 25 June
Update Mon 25 Jun 19:03
New seismic swarm under Katla volcano caldera on 21 June
Update Fri 22 Jun 11:30
Shallow earthquake swarm under Katla's southern caldera continues
Update Sat 09 Jun 12:20The earthquake swarm under the southern part of the icecap of Katla volcano that had started on 5 June continues with 30 more quakes recorded during the past 48 hours.
The quakes are mostly very small, but a few were between magnitude 2 and 3, and most are located at shallow depths of less than 5 km.
For the list of latest quakes go to the Icelandic Met Office website.
Thursday, Aug 23, 2012
As can be seen from our new plots of recent nearby quakes, the number of earthquakes near Katla appears to have been gradually increasing during August. However, most quakes are very shallow and probably NOT caused by magmatic movements, but adjustments of the shallow hydrothermal system. A possibility is that this is a seasonal pattern caused by the warming and increased melting of ice during summer. ... [more]
Friday, Aug 17, 2012
A small swarm of quakes has been going on at Katla since yesterday. So far, 10 quakes have occurred today, including a M2.8 quake at 1.8 km depth 6.8 km E of Goðabunga. [more]
Friday, Jun 22, 2012
Another seismic swarm has occurred at Katla volcano yesterday. About 30 small quakes at shallow depths mostly between 1 and 6 km in the central part of the caldera were recorded and could indicate another intrusion or changes in the hydrothermal system. [more]
Saturday, Jun 09, 2012
Thursday, Jun 07, 2012
A new swarm of earthquakes has started Tuesday (5 June) evening at Katla volcano. Until now, 34 quakes up to magnitude 2 have been recorded beneath the volcano, at mostly shallow depths around 3-7 km. The quakes are clustered in the SE part of the caldera, and could indicate that a magmatic intrusion is taking place in this area. Whether this is a precursor to a possible eruption of the volcano remains speculation. [more]
Katla volcano (Iceland): small earthquake swarm, but not likely indicator of activity in the near future
Tuesday, May 29, 2012
A swarm of 14 small to very small mostly very shallow quakes occurred at Katla volcano yesterday and today. Epicenter depths were reported between 0.1 and 12.2 km. Judging from the depth and magnitude of the quakes, the most likely cause for the seismic swarm are adjustments of the hydrothermal system under the icecap, and probably not magmatic intrusions (which would be possible indicators of a future new eruption). ... [more]
Wednesday, May 16, 2012
Katla volcano continues to show signs of increased unrest. A small glacial flood occurred from under the volcano's icecap Katla around 28 April 2012 and possibly again around 7-8 May, both times accompanied by increased levels of harmonic tremor. This suggests that magma movements inside the volcano might be heating up the ground, causing increased melting. ... [more]
Friday, Feb 24, 2012
Jón Frímann on his dedicated blog about Icelandic (and not only) volcanoes closely follows what is happening there: a cluster of minor earthquakes has been showing up under the Katla volcano caldera. This has been following a gradual increase in seismic activity under Katla during the past few weeks. It could be a signal of new volcanic activity to be expected on a timescale of few weeks to months. A new eruption would probably be heralded by a strong seismic swarm, and could start and build up rapidly. It did so in July 2011 when a sudden increase in earthquake activity occurred and there was an small eruption without warning. [more]
Monday, Feb 20, 2012
Volcanic tremor (a low frequency vibration often caused by magma rising to the surface) has been observed under Katla volcano in southern Iceland, Jón Frímann reports on his Iceland volcanoes blog (see below), closely following seismic activity in Iceland recorded both by national instruments and his own private geophone network. ... [more]
Thursday, Feb 16, 2012
Two of Iceland's most known and active volcanoes are showing signs of unrest. Another seismic swarm (after the last one around 3 Feb) occurred at Katla volcano yesterday, although it was weaker than the previous ones. Most likely, the swarm was caused by another shallow dike injection (magma intrusion) beneath the crater, confirming the ongoing unrest at the volcano. ... [more]
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