Posted on by Jón Frímann

Earthquake swarm in Þórðarhyrna volcano

Today (11. May 2023) there was a earthquake swarm in Þórðarhyrna volcano. This are small earthquakes, but their location and depth suggest that this is a dyke intrusion taking place at this location.

Earthquake swarm in south-west part of Þórðarhyrna volcano. This volcano is located in Vatnajökull glacier, just few km south of Grímsfjall volcano, is part of the Grímsfjall volcano fissure swarm. Time on image 11. May. 23 13:10.
Earthquake activity in Þórðarhyrna volcano. Copyright of this image belongs to Icelandic Met Office.

Þórðarhyrna volcano is part of Grímsfjall volcano fissure swarm, that connects to Laki eruption fissures. Last eruption in Þórðarhyrna volcano was in the year 1902 to 1904 and had the VEI=4 according to Global Volcanism Program report that can be read here.