Earthquake swarm north of Grindavík town

Today (8-December-2021) an earthquake swarm started north of Grindavík town. Largest earthquake in this swarm so far had a magnitude of Mw3,1 at 10:44. The news doesn’t say if this earthquake was felt in Grindavík. Earthquake activity has been going up recent weeks since the eruption in Fagradalsfjall ended on 18th September 2021. A swarm of smaller earthquake activity is currently ongoing in this same area at the writing of this article.

Earthquake activity north of Grindavík town shown with a lot of dots on the map. Green star shows the largest earthquake
Earthquake activity north of Grindavík town. Copyright of this image belongs to Icelandic Met Office.

This activity is in a different volcano than that erupted earlier this year in Fagradalsfjall. Currently, that eruption is connected with Krýsuvík-Trölladyngja but it might be its own volcano. Its remains unclear for now what volcano was erupting. This earthquake activity is happening in a volcano called Reykjanes and might have erupted in the year 1831 (or not, the details are unclear).

There is a risk of stronger earthquake activity in this area. When it might happen is impossible to know.


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