Category: Swarm

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Earthquake activity continues east of Grímsey island

Today (12-April-2019) an earthquake swarm took place east of Grímsey island. This earthquake swarm is in a place that has been having many earthquake swarms in recent weeks. Largest earthquake in this swarm had a magnitude of 2,7 and other earthquakes were smaller in magnitude. As of writing this article the earthquake swarm seems to have stopped, how long that is going to last is impossible to know.


The earthquake swarm east of Grímsey island. Copyright of this image belongs to Icelandic Met Office.

Current outlook for this area of Tjörnes Fracture Zone is that earthquake activity is going to continue as it has been doing since January when this whole thing started slowly. There is not possible to know when this earthquake sequence ends in Tjörnes Fracture Zone. The risk of a large earthquakes continues to be in this area at the writing of this article.

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Update added on 24-April-2019

If you are donating with a bank. Please update your information again to my Danish bank. Since I am on my way to move back to Denmark in next few months. All the information can be found here. Thanks for the support. 🙂

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Magnitude 3,3 earthquake east of Grímsey island

I am sorry for the late posting of this earthquake activity.

During the night of 8-April-2019 at 04:44 UTC an earthquake with magnitude 3,3 took place east of Grímsey island. This earthquake is part of a swarm earthquake activity in this area that started few weeks ago and is mostly ongoing as of writing this article.


The earthquake activity east of Grímsey island. Copyright of this image belongs to Icelandic Met Office.

The earthquake swarm west of Kópasker village continues and there continue to happen several earthquakes each day in that area. There are no clear signs showing that this earthquake activity is about to stop.

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Update on ongoing earthquake swarm west of Kópasker (Tjörnes Fracture Zone)

The earthquake swarm that started on 23rd of March 2019 west of Kópasker village is ongoing and hasn’t stopped since that time. Number of earthquakes and magnitude of earthquakes have mostly dropped and in last few days there hasn’t been any earthquake that has reached magnitude 3,0 or larger. This might change without warning since this earthquake activity is ongoing.


The earthquake swarm west of Kópasker village. Copyright of this image belongs to Icelandic Met Office.

According to recent news articles this is the strongest and longest earthquake swarm on this fault since 1991 (28 years) according to data that scientist at Icelandic Met Office looked at in their records. This is as far back their data possibly go back for this part of Iceland. Over 3000 earthquakes have been recorded in this earthquake swarm since it started.

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Update on the earthquake swarm on Tjörnes Fracture Zone

This is a update on the earthquake swarm on Tjörnes Fracture Zone. Information in this article might get outdated quickly.

The earthquake swarm is ongoing as of writing of this article, it has now been going for a week. Since Wednesday there haven’t been any earthquakes over magnitude 3,0. Largest earthquake have reached magnitude 2,9 in last 48 hours. Total number of earthquakes in last 48 hours is around 567.


The earthquake swarm west of Kópasker village. Copyright of this image belongs to Icelandic Met Office.

This earthquake swarm has been slowly getting less intense and fewer earthquakes have been recorded since yesterday than the days before. It does not mean that this earthquake swarm is over. It might increase again if a large earthquake happens (magnitude 4,0+).

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Update on the earthquake swarm on Tjörnes Fracture Zone (west of Kópasker village)

Uncertainty level has been declared in the area close to Kópasker village due to this earthquake swarm. This is the lowest alert level in Iceland.

Since this earthquake swarm started on Saturday around 1800 earthquake have taken place according to Icelandic Met Office. Largest earthquakes in the last 24 hours have magnitude 3,8 and 3,0. This might change in next few hours since this earthquake swarm is ongoing.


The earthquake swarm (green stars) west of Kópasker. Copyright of this image belongs to Icelandic Met Office.

This earthquake swarm has increased the risk of a magnitude 6,0 or larger earthquake in the Tjörnes Fracture Zone. This earthquake swarm is large for this part of the Tjörnes Fracture Zone.

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Magnitude 4,2 earthquake west of Kópasker village

At 20:29 UTC an magnitude 4,2 earthquake took place in the earthquake swarm west of Kópasker village. This has increased the earthquake swarm in this area. The magnitude 4,2 was followed by a magnitude 3,3 earthquake few seconds later.


Earthquake swarm west of Kópasker (green stars). Copyright of this image belongs to Icelandic Met Office.

The earthquake swarm is currently ongoing and this information might change without warning.

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Two earthquake swarms in Tjörnes Fracture Zone (TFZ)

Over the last few days there has been small earthquake swarm activity in Tjörnes Fracture Zone. The activity has been in two locations, west of Kópasker village and east of Grímsey island (ongoing swarm). Both earthquake swarms are small for now and only few earthquakes larger than magnitude 2,0 have happened. Total number of earthquakes is around 146 for the whole Tjörnes Fracture Zone when this article is written.


Current earthquake activity on the Tjörnes Fracture Zone. Copyright of this image belongs to Icelandic Met Office.

The earthquake swarm east of Grímsey island is not over as it has not yet peaked based on what I am seeing. It is more difficult to know about the earthquake swarm west of Kópasker village. As of writing of this article both earthquake swarms are ongoing.

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Update on the earthquake swarm east of Grímsey island in Nafir volcano

This is a short update on the earthquake swarm east of Grímsey island in the Nafir volcano (no Global Volcanism Program profile). Yesterday (19-March-2019) a magnitude 3,2 earthquake happened. Other earthquakes both before and after it are smaller in magnitude. In total over 200 earthquakes appear to have taken place in this earthquake swarm.


Earthquake activity yesterday (19-March-2019) in Nafir volcano. Copyright of this image belongs to Icelandic Met Office.

Earthquake activity has currently stopped. Based on the pattern in the earthquake swarm last year this might not be over and this might be going on for weeks until a peak is reached in earthquake swarm activity. It is impossible to know for sure what happens next in this earthquake activity in this area.

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Earthquake swarm east of Grímsey island (Tjörnes Fracture Zone)

During the night of 18-March-2019 an earthquake swarm started east of Grímsey island in a volcano called Nafir (no Global Volcanism Program profile). The only GVP profile that exists is about the volcano south of this one (GVP profile can be found here). The volcano in this area doesn’t have any documented eruption history in recent 10.000+ years. This might be wrong due to lack of research. In 2018 there was a strong earthquake swarm in this area. Articles connected to that earthquake swarm can be read here. Top of the earthquake activity on 19th of February 2018 looked like this as I wrote in a article last year. Current earthquake activity suggests a repeat of last year activity, only time is going to show if this does happen, but clues are strong in that direction. Earthquake activity in this area is complex and this is a rift valley it is taking place in.


The earthquake swarm east of Grímsey island in Tjörnes Fracture Zone. Copyright of this image belongs to Icelandic Met Office.

Largest earthquake so far has the magnitude of 3,3 and other earthquakes are smaller in magnitude. Currently around 55 earthquakes have been recorded. The earthquake swarm is ongoing even if current rate of earthquakes is low.

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Earthquake activity in Presthnjúkar volcano (south Langjökull glacier)

Yesterday (16-March-2019) an earthquake swarm took place in Presthnjúkar volcano (south-Langjökull) or a volcano connected to it (there is a chance this volcano does not have a Global Volcanism Program profile). This earthquake swarm has been slow moving and only around 21 earthquakes have taken place in this earthquake swarm.


The earthquake swarm in Langjökull glacier. Copyright of this image belongs to Icelandic Met Office.

Largest earthquake in this swarm had a magnitude of 3,0 and other earthquakes that took place were smaller in magnitude. It is unclear why this earthquake activity is taking place, there is a chance this is just a tectonic movement. Last eruption in this volcano took place more than 5000 years ago. It appears that this earthquake swarm is now over. There is always a possibility that new earthquake swarm is going to start at the same or close to this earthquake swarm location.

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