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Katla volcano (Iceland) activity update: Minor earthquake cluster in Katla volcano caldera

Friday Feb 24, 2012 11:05 AM | BY: C!H!F

The recent earthquakes under Katla
The recent earthquakes under Katla
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.
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Links / Sources:

Katla volcano (Iceland): harmonic tremor could indicate a small eruption

Monday Feb 20, 2012 22:53 PM | BY: T

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.
According to Jón, there are 2 possible explanations: one could simply be an increase in hydrothermal activity in the northern part of Katla volcano.
The second could be magma movements at depth although there have been no significant earthquakes that usually would accompany an intrusion or small (sub-glacial) eruption, although this still could occur in the near future as often observed in the past during similar episodes of tremor followed by earthquakes.
The last minor eruption at Katla volcano was on 6 September 2011, and caused a small glacial flood.
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Previous news
Saturday, Feb 18, 2012
Photos from our last tour to Guatemala (Jan 2012) - Pacaya, Atitlan, Santiaguito and Fuego volcano are now online! The next tours to Guatemala: 8-21 Dec 2012 and 22 Dec 12 - 4 Jan 13. [more]
Wednesday, Feb 15, 2012
The new USGS / GVP weekly activity updates report is now available. The summary: ... [more]
Few places left on Iceland Winter Photo Tour 16-20 March 2012
Wednesday, Feb 01, 2012
Why not combine your interest in photography with a winter visit to Iceland? On this tour you get to visit some of Iceland´s most famous sights whilst in winter mode. ... [more]

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