Katla volcano news & activity updates
Katla volcano (Iceland): magnitude 4.5 earthquake, strongest in decades
Monday Aug 29, 2016 09:43 AM | BY: T
Earthquakes under Katla volcano during the past 48 hours (image: IMO)At least one earthquake of magnitude 4.5 occurred this morning under the volcano, the strongest recorded for Katla in recent decades. It was felt in nearby areas.
The Icelandic Met Office (IMO) reported two quakes, one at 01:47:02 local time at 3.8 km depth 8.1 km east of the summit (Goðabunga) followed 20 seconds later by another magnitude 4.5 quake at 0.1 km depth. Caution is required as these data are from automatic calculations which could actually in fact describe only one quake.
During the past 48 hours, IMO has detected 48 earthquakes - most of them tiny, but including 4 of magnitudes of 3 or higher - at shallow depths under Katla.
Whether these earthquakes are caused by magmatic activity - and thus could be a sign of a new eruption in preparation - or a result of gravitational adjustments (as ice melt during the summer changes the weight of the glacier) is currently unknown.
Wednesday, Jul 16, 2014
An increased number of small earthquakes, up to magnitude 2.7, has been occurring near the surface or at very shallow depths under Katla's ice cap since yesterday. ... [more]
Wednesday, Jul 09, 2014
Earthquakes have been more frequent recently under the volcano recently. Most of them were small (below mag. 3) and shallow events. It is unknown whether these relate to magmatic movements inside the volcano, increased hydrothermal activity or are adjustments of the ice cap due to increased melting. ... [more]
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]