During the night of 8-September-2022 at 04:01 UTC an earthquake with magnitude of Mw4,9 took place east of Grímsey island. According to news reports this earthquake did wake up people in Grímsey island and was felt over a wide area in north-eastern Iceland. Over 22 earthquakes with magnitude above Mw3,0 have taken place since this earthquake swarm started. Over 700 earthquakes have been recorded at the writing of this article. This earthquake swarm is ongoing and number of earthquakes and possible stronger earthquakes might happen after this article is published.
Earthquake swarms like this are common in this part of Tjörnes Fracture Zone and happen every 2 to 3 years, it is longer between large earthquakes in the magnitude range of 6,0 to 7,0, but they do happen. This area has an volcano, but there are no signs that is currently active and remains dormant.
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This swarm is certain a very active burst. What is the name of the dormant volcano?
I think this area is called Nafir. I think Mánareyjar islands are south of the current earthquake area.
https://volcano.si.edu/volcano.cfm?vn=373100
This area has a active hydrothermal area. According to research in this area. This is more of a fault zone, rather than a volcano zone but this whole part of Iceland is complicated in terms of geology.
Thank you.