Tag: Tjörnes Fracture Zone

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Earthquake activity east of Grímsey island

Yesterday (28-October-2021) an earthquake swarm took place east of Grímsey island. The largest earthquake had a magnitude of Mw3,9 at 22:06 UTC. It is not know if it was felt in Grímsey island.

Earthquake activity east of Grímsey island. Largest earthquake shown by a green star.
Earthquake activity east of Grímsey island. Copyright of this image belongs to Icelandic Met Office.

Earthquakes are common in this area and large earthquake swarm happens in this location every 2 to 10 years.

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Minor earthquake swarm in Tjörnes Fracture Zone yesterday (30-August-2021)

Yesterday (30-August-2021) an small earthquake swarm took place east of Grímsey island in Tjörnes Fracture Zone. Two largest earthquakes had a magnitude of Mw3,2.

Earthquake swarm east of Grímsey island. Two green stars on top of each other.
Earthquakes east of Grímsey island. Copyright of this image belongs to Icelandic Met Office.

This earthquake swarm seems to have stopped for now. This area has frequent earthquake swarms and activity in this area of Tjörnes Fracture Zone might start again without warning.

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Earthquake swarm in Tjörnes Fracture Zone

During the night of 5-August-2021 an earthquake swarm took place in Tjörnes Fracture Zone (TFZ). At the writing of this article this earthquake swarm is ongoing.

Few red dots show new earthquakes just south-east of Grimsey island
Earthquake activity south-east of Grímsey island. Copyright of this image belongs to Icelandic Met Office.

Largest earthquake in this swarm had a magnitude of Mw3,0. Other earthquakes where smaller in magnitude. No earthquake has been felt in Grímsey island.

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