Update five on the earthquake swarm in Tjörnes Fracture Zone (TFZ)

This is the last update on the earthquake swarm activity until something more happens in Tjörnes Fracture Zone.

Current earthquake activity is getting smaller at the writing of this article and few earthquakes over magnitude Mw3,0 are happening now. Over the last 48 hours only 5 earthquakes have reached magnitude Mw3,0 and larger and only around 650 earthquakes have happened in the last 48 hours. Largest of this earthquakes had a magnitude of Mw4,1 today at 04:52 UTC.

The earthquake activity on the Tjörnes Fracture Zone. Copyright of this image belongs to Icelandic Met Office.

The risk of magnitude Mw7,0 to Mw7,4 earthquake remains in Tjörnes Fracture Zone after this activity and there is still a warning in place for it. The fault that moved on Sunday 21st June in the Mw6,0 (USGS/EMSC. IMO reports MW5,8) earthquake seems to have been 20km to 30km long based on the earthquake activity along the fault rupture in north-south direction about 33 km west-south-west of Grímsey island. At the writing of this article there have been over 7000 earthquakes been detected by Icelandic Met Office.


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