Bardarbunga volcano (Iceland): magnitude 3.8 earthquake, likely not related to magma movements
Wed, 31 Aug 2016, 16:3516:35 PM | BY: T
Yesterday's magnitude 3.8 quake at Bardarbunga volcano
A magnitude 3.8 earthquake followed by dozens of small aftershocks occurred yesterday at 3 km depth under the volcano's northeastern caldera rim (located under the ice cap).
Depth vs time of recent quakes under Barrdarbunga
While it is possible that such earthquakes are caused by shallow magma intrusions, the present quakes at Bardarbunga are more likely result of volcano-tectonic movements, in this case the continuing subsidence of the caldera (a so-called slow caldera collapse) which has been going on since the large 2014-15 Holuhraun flank eruption.
This also seems to reflect the opinion of Icelandic Met Office's seismologists according to a local press article.
Thu, 4 Aug 2016, 07:35
Moderate seismic unrest continues at the volcano. A swarm of earthquakes occurred yesterday afternoon under the northern caldera rim of the volcano. Read all
Fri, 13 May 2016, 17:58
Ever since the large Holuhraun fissure eruption (Aug 2014-Mar 2015), the volcano has remained restless. Over the past months, the volcano's seismic activity has been showing a slow increase. ... Read all