Earthquake swarm in Brennisteinsfjöll volcano

Early morning of 7. January 2023 an earthquake swarm took place in Brennisteinsfjöll volcano. All of the earthquakes are small in magnitude and largest earthquake had a automatic magnitude of Mw1,0. Depth of this earthquakes is from 7 km and down to 9,5 km depth.

Orange dots in Brennisteinsfjöll volcano on Reykjanes peninsula. Location based on automatic data suggests that this is earthquake swarm created by magma, rather than tectonic processes.
Earthquake swarm in Brennisteinsfjöll volcano. Copyright of this image belongs to Icelandic Met Office.

Automatic location data suggests this is an earthquake swarm by magma injection into the crust (dyke), rather than earthquake swarm because crustal movement. This estimate might change when this earthquake data is reviewed by Icelandic Met Office.