Overview of Earthquake activity

Earthquake activity throughout the country is described in a weekly summary that is written by a Natural Hazard Specialist. The weekly summary is published on the web every Tuesday. It covers the activity of the previous week in all seismic areas and volcanic systems in the country. If earthquake swarms are ongoing or significant events such as larger earthquakes have occurred during the week, they are specifically discussed. 

Weekly overview

Weekly overview, 1. - 7. April - week 14 2024

Around 450 earthquakes were detected in week thirteen, about 430 have been manually reviewed. Last week around 570 earthquakes were detected.

The activity was spread over the country. The biggest earthquake was in Bárðarbunga on the 7th of april, 2.9 in magnitude.

Further news on the ongoing activity near Grindavík can be found here and is updated regularly.

Weekly overview, 04. - 10. March - week 10 2024

Around 650 earthquakes were detected in week ten, all have been manually reviewed. Last week 1560 earthquakes were detected. This was due to magma propagation from Svartsengi to the dike underneath Súndhnúkagígaröð on March 3rd . Magma continues to accumulate beneath Svartsengi. Considering this, the total amount of magma beneath Svartsengi will be over 11 million cubic metres. There is an increased likelihood of new magma propagation and volcanic eruption within the next days.

Most activity during the last week has been on the Reykjanes peninsula. A minor swarm was deteced near Eiturhól in the Hengill area and minor activity was in Vatnajökull and in the North part of Iceland.

Further news on the ongoing activity near Grindavík can be found here and is updated regularly.

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Weekly overview, 19.-25. February - week 8 2024.

Close to 900 earthquakes were detected this eigth week 2024, 770 of which have been manually reviewed. Diverse range of different activity has been detected this week with the continuing uplift in Svartsengi and earthquake activity in the dyke by Sundhnjúksgígar has taken most of the attention. Uplift in Svartsengi has continued at a steady speed, and modeling estimates that the volume of magma below Svartsengi has reached 7.6M cubic meters as of 25. February 2024.
The largest event this week was a M3.2 in Bárðarbunga on February 25th. Substantial activity has been in both Grímsvötn and Bárðarbunga, both with around 15 detected earthquakes this week. A small seismic swarm has been ongoing in Húsmúli in Hengill from February 15th, but seismic swarms are common in the area and where borehole injections are known to induce seismicity. A similar swarm has been ongoing this week around Bæjarfjall in the North of Iceland.

Further news on the ongoing activity near Grindavík can be found here and is updated regularly.

Weekly overview Jan. 22nd - 28th - week 4 2024

This week 670 earthquakes were located by the automatic system and 530 events have been manually reviewed. Around 320 earthquakes took place on the Reykjanes Peninsula. One of the largest events of the week occurred on the peninsula, a magnitude 3.1 west of Bláfjöll mountains early on Saturday morning. Some aftershock activity followed. An earthquake of the same size was detected in Eldey on January 25th.
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