This morning (01.03.2017) there was an strong earthquake swarm in Bárðarbunga volcano. Strongest earthquake in this swarm had the magnitude of 4,1 and other earthquakes where smaller. Total of 5 earthquake happened with magnitude above 3,0.
The earthquake swarm in Bárðarbunga volcano. Green stars are the earthquakes with magnitude above 3,0. Copyright of this image belongs to Icelandic Met Office.
This is how the largest earthquake with the magnitude of 4,1 appeared on my geophones.
The magnitude 4,1 earthquake at Heklubyggð geophone. Shows strong surface wave activity. Filtered at 1Hz. This image is under Creative Commons Licence. See CC Licence site for more details.
The magnitude 4,1 earthquake at Böðvarshólar geophone. Filtered at 4Hz. This image is under Creative Commons Licence. See CC Licence site for more details.
This earthquake activity happens due to magma influx into Bárðarbunga volcano, resulting in a inflation. The last month (February 2017) has been the most quiet since end of the eruption in Bárðarbunga volcano in February 2015.
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