Category: Earthquakes

Posted on

Just 700 earthquakes recorded in January 2013

According to Icelandic Meteorological Office. Just 700 earthquakes where recorded in January 2013. This is the least active month in Iceland since March 2012. This lack of earthquake activity has meant that I have not had a lot to write about on this blog here.

It is impossible to know if the quiet time is going to continue. But so far of February 2013 this has been the case. But I am sure when the activity picks up in Iceland it is going to pick up in a way that it is going to be noticed.

More about this quiet period in Icelandic

Minni virkni en undanfarna mánuði (mbl.is)
Jarðskjálftar í janúar 2013 (vedur.is)

Posted on

Minor earthquake swarm on Reykjanes Ridge

A minor earthquake swarm started on Reykjanes Ridge today. So far no earthquake has had the magnitude 3.0 or larger. The largest earthquake so far has had the magnitude 2.8. The depth of this earthquake swarm is around 4 to 7 km.

130206_1850
The earthquake swarm on the Reykjanes Ridge at 18:50 UTC. Copyright of this image belongs to Icelandic Meteorological Office.

It is hard to know what happens with this earthquake swarm. But if any major changes happens with this earthquake swarm. I am going to post a blog post about it soon as possible.

Posted on

Interesting earthquakes close to Tungafellsjökull volcano

There is some interesting earthquake activity taking place close to Tungnafellsjökull volcano. This earthquake activity started last year in this area. It is unclear what is happening. But this might just be normal tectonic activity. The earthquakes are on the depth of around 4 km.


Earthquake activity close to Tungafellsjökull. Copyright of this image belongs to Icelandic Meteorological Office.

I am not sure if earthquake activity is going to continue in this area. As earthquake activity is intermittent in this area. The Torfajökull volcano however remains silent. But this activity is interesting. Since this area normally does not have earthquake, since it remains outside the main fault zones. But it is still inside the main rift zone in Iceland.

Posted on

Magnitude 3.2 earthquake in TFZ

At 04:03 UTC on 29.01.2013 an magnitude 3.2 earthquake did happen at TFZ. This earthquake was not felt according to news on this earthquake. Several aftershocks where detected following this magnitude 3.2 earthquake.


The magnitude 3.2 earthquake in TFZ. Along with aftershocks in the same area. Copyright of this image belongs to Icelandic Meteorological Office.

There is a lot of tension in TFZ. But this earthquake swarm does not mean it is ready to break yet. When that happens is impossible to know at this time. Earthquake detection is difficult in Iceland at the moment due to bad weather and strong winds.

Posted on

Magnitude 3.1 earthquake on the Reykjanes peninsula

At 00:41 UTC on 25.01.2013 an magnitude 3.1 earthquake did take place on Reykjanes peninsula. This earthquake was felt in Reykjavík, Hafnarfjörður and few other nearby populated areas. Two aftershocks did follow this earthquake. Both had the magnitude 1.5. It is impossible to know if this earthquake activity is going to start an earthquake swarm in this area. Sometimes that happens, sometimes it doesn’t.


The green star marks the location of the magnitude 3.1 earthquake. Copyright of this image belongs to Icelandic Meteorological Office.

No further earthquake activity has so far taken place in this area during the past two to three hours. This earthquake activity does not appear to be volcano related. But this is normal tectonic movements of the rift zone that makes up Reykjanes peninsula.

Icelandic news about this earthquake. Please use Google translate and hope for the best.

All snarpur skjálfti á Reykjanesskaga (Rúv.is)
Jarðskjálfti fannst á höfuðborgarsvæði (mbl.is)
Jarðskjálfti við Keili (Vísir.is)

Posted on

Magnitude 3.8 earthquake in Bárðarbunga volcano

During the night at 04:50 UTC there was an earthquake with the magnitude 3.8 in Bárðarbunga volcano. This appears to be a minor dike intrusions into Bárðarbunga volcano. This happens regularly in Bárðarbunga volcano. Often resulting in a lot larger earthquakes then current earthquake swarm that is taking place in Bárðarbunga volcano.


Earthquake activity in Bárðarbunga volcano. The star is the magnitude 3.8 earthquake. Copyright of this image belongs to Icelandic Meteorological Office.

It is impossible to know what is going on in Bárðarbunga volcano. But there is no risk for volcano eruption for now. Even if there is possibility of minor dike intrusion taking place in Bárðarbunga volcano at the moment. I am not expecting anything more at the moment. But more earthquakes can not be ruled out, as Bárðarbunga volcano is a earthquake active volcano.

Posted on

Earthquakes deep on the Reykjanes Ridge

Yesterday (20.01.2013) there where few medium sized earthquakes deep on the Reykjanes Ridge. This earthquakes where far off the coast of Iceland (around 1340 km from Reykjavík). So this earthquake swarm is just being noticed on instruments. What is going on there is impossible to know. The largest earthquake in this swarm is a magnitude Mb5.2 earthquake that did happen at 21:40 UTC. Earlier and earthquakes that did follow this earthquake had the magnitude from Mb4.7 to Mb5.0. But any smaller earthquakes are unlikely to be detected at this distance from any seismometer network in Europe or America.


Location of the largest earthquake in this swarm. A magnitude 5.2 earthquake. Copyright of this image belongs to EMSC.

More earthquake activity might take place on this location. But it is hard to know due to lack of data. But it is worth keeping an eye on it. As things remain quiet in Iceland at the moment.

Blog post updated at 00:37 UTC on 21.01.2013.

Posted on

Magnitude 3.3 earthquake in Bárðarbunga volcano during the night

At 02:55 UTC today (18.12.2012) there was a magnitude 3.3 earthquake in Bárðarbunga volcano system. Earthquakes are common in this area so this activity is no surprise. Origins of this earthquakes are due to tectonic movements in the area. Not magma related changes.


Green star marks the magnitude 3.3 earthquake in Bárðarbunga volcano system. Copyright of this image belongs to Icelandic Meteorological Office.

Aftershocks have followed this earthquake. So far the largest one got the magnitude 2.2. More earthquake activity can be expected in this area. But that is normal and not unexpected.

Posted on

Earthquake swarm in Katla volcano caldera

Yesterday (14.12.2012) from 20:50 UTC until 22:52 UTC there was an minor earthquake swarm in Katla volcano caldera. The largest earthquake in this swarm was a magnitude 2,2 earthquake. With the depth of 0,1 km. So it was a shallow earthquake. This is not uncommon for this part of Katla volcano. This earthquake activity has its origin in hydrothermal activity or changes in hydrothermal systems in this area of Katla volcano caldera.


Earthquake swarm in Katla volcano. This area has had earthquakes swarms before. Copyright of this image belongs to Icelandic Meteorological Office.

I do not expect anything special to result from this earthquake swarm. Since it is highly unlikely that Katla volcano is going to erupt in December. It is also a when it comes to earthquakes. Katla volcano has a lot of them during the year and earthquake swarm as this one should be expected to happen every once in a while.

Blog post updated at 10:42 UTC on 15.12.2012.