Deep earthquake activity in Bárðarbunga volcano

Yesterday (06-September-2016) and today (07-September-2016) deep earthquake activity happened in Bárðarbunga volcano system. Most depth was at 25,9km in Trölladyngja, it is one of several deep earthquakes that have happened in that area. Few earthquakes at depth of 20,8 km took place in Bárðarbunga volcano (outside of the caldera).

The deep earthquakes on this image are at south-east to Bárðarbunga (in the direction of Grímsvötn, north-east of Grímsvötn) and in Trölladyngja (one blue dot). Copyright of this image belongs to Icelandic Met Office.

In Iceland earthquakes at this depth only happens due to movement of magma. Crust stresses do have effects at this depth far as I know. At the moment no magnitude 3,0 earthquakes have happened in Bárðarbunga, that might be unusual since normally after a swarm of deep earthquake few strong earthquakes happens in Bárðarbunga. That has at time of writing of this article not happened. If that happens remains to be seen. I got the feeling there might be something more in the works, but I’m going to wait and see what is going on now. At least wait for a word from Iceland Met Office about what is going on, if anything is going on at all.

All that can be done now is to wait for what happens next. (This is what geology is mostly about, endless waiting for something to happen.)

New earthquake activity in Katla volcano

Early this morning (7-September-2016) an earthquake with the magnitude of 3,5 took place in Katla volcano. There was little earthquake activity before the main earthquake and after it, since this morning activity has remained low.

Earthquake activity in Katla volcano. Copyright of this image belongs to Icelandic Met Office.

This earthquake activity is in the same area of the magnitude 4,9 earthquake two weeks ago. No harmonic tremor has been detected following this earthquake. I don’t know if anything more is going to happen. All that can be done is to wait and see what happens next.