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, 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.
Read more

Weekly overview, 15th. - 21st. January - week 3 2024

Around 3000 earthquakes were detected this third week of 2024, however only 650 of which have been manually reviewed.

The largest earthquake of the week was in Bárðarbunga on the 17th of January, M4.1. The second largest earthquake was on the 15th of January, M2.7 in the same area.

Ongoing and increasing activity is near Grímsfjall and around 25 earthquakes have been detected there, but the glacial flood is decreasing.

Seismic activity continues to decrease in the area of the magma dyke near Grindavík and deformation signals seen on GPS devices suggest significant slowdown of ground movement compared to previous days. This information suggest that magma is no longer flowing into the dyke which was formed on the 14th of January. However, clear signals of a continued land uplift are still being detected beneath Svartsengi.No activity has been since the 16th of January and the eruption has formally ended on the 19th of January.

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

Read more

Weekly overview, 1.-7. January - week 1 2024.

Around 2750 earthquakes were detected this first week of the new year, however only 700 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 will reach the erupted volume, 11M cubicmeters in the next days.
The largest event this week was a M4.2 in Trölladyngja on January 3rd. Considerable aftershock activity followed that earthquake with the largest M3.5. These two largest events were felt in SW Iceland and even as east as Hella. This event has been interperated as a triggered event due to the ongoing volcanic activity near Svartsengi and Grindavík.
The IMO also got a few felt reports of a M2.9 on January 2nd at 02:47 just north of Hveragerði.
Noticable activity was detected in Grímsvötn this week, around 20 events, especially in the afternoon of January 4th when 7 earthquakes of magnitude just above M1.0 within an hour which reached a threshold for raising the aviational colorcode to yellow. The increased activity did not last any longer than that and the colorcode was lowered to green the day after. Just before midnight on January 7th an earthquake swarm started 10 km NNE of Grímsey.

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







Other related web sites


This website is built with Eplica CMS