Small earthquake swarm on Tjörnes Fracture Zone south east of Grímsey island


Yesterdat (02-December-2020) at 11:38 UTC an small earthquake swarm started on Tjörnes Fracture Zone just south-east of Grímsey island. Largest earthquake in this swarm had a magnitude of Mw3,1. This earthquake swarm was small but there is also a strong snowstorm in Iceland and that has limited detection of earthquakes since late Monday (30-November-2020).

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

This is a different area from the area that had strongest earthquake swarm in 40 years on Tjörnes Fracture Zone in June 2020 when the largest earthquake had a magnitude of Mw6,0. It is difficult to know if there is going to be more earthquake activity in this area. There is always a risk that is going to happen.


2 Replies to “Small earthquake swarm on Tjörnes Fracture Zone south east of Grímsey island”

  1. This earthquake swarm was north of the Kolbeinsey volcano system and ridge. I don’t know if that location has any volcanoes. It is possible but I don’t know if that has been studied. I didn’t write about it because its far out on the ocean. I did record few of the largest earthquakes on my geophones. But that signals I got where poor due to distance.

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