Magnitude 3,2 earthquake in Torfajökull volcano

Today (12-July-2019) at 17:16 UTC a magnitude 3,2 earthquake took place in Torfajökull volcano. This earthquake might have been felt by tourists in the area. This earthquake being felt has not yet been reported according to any news media.


The earthquake activity in Torfajökull volcano (green star). Copyright of this image belongs to Icelandic Met Office.

This area of Torfajökull volcano has been having earthquake activity since January 27 when a magnitude 3,7 earthquake took place there. That activity was followed by a larger swarm of aftershocks than have so far happened. That might change without warning. This earthquake activity is interesting but I am not sure if it means anything, at least for now.

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Earthquake swarm on the south part of Tjörnes Fracture Zone (TFZ)

Since yesterday (6-July-2019) there has been a ongoing earthquake swarm in south part of the Tjörnes Fracture Zone (TFZ). The number of earthquakes recorded is close to 170 when this article is written. This number is going to go quickly outdated. Exact largest magnitude is not clear since automatic magnitude is not always correct.


The earthquake activity in south part of Tjörnes Fracture Zone. Copyright of this image belongs to Icelandic Met Office.

At this location there is a volcano that erupted in the year 1868 for about a month (December 1867 to January 1868) according to historical documents. Global Volcanism Information can be found here. There are no sign of this earthquake activity being connected to a volcano activity. I don’t know if that is going to change.

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Recording of the California, United States, Mw7,1 earthquake

This is my geophone recording of the Mw7,1 earthquake in California. I don’t have any comments on this activity since I don’t know anything about the tectonic settings in California and how the set-up is regarding fault lines and tectonics in this area. I did only record the surface waves clearly and that is unusual given the distance from the source of the earthquake (6756 km).


The Z (vertical) recording.


The North-South recording.


The East-West recording.

The surface waves are strongest on North-South recording. I did not record the Mw6.5 earthquake on the 4th of July.

Update

Due to errors I discovered I have corrected this article and the images used.

Earthquake swarm east of Grímsey island (Tjörnes Fracture Zone)

A small earthquake swarm started today (30-June-2019) east of Grímsey island. Largest earthquake in this swarm had a magnitude of 3,6. There are no news that it had been felt.


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

This is one of several earthquake swarms in this area of Tjörnes Fracture Zone this year. More activity can be expected in next few months. This earthquake swarm activity appears to be only tectonic in nature.

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Three strong earthquakes in Bárðarbunga volcano

Today (24-June-2019) at 13:09 UTC, 13:18 UTC and 13:55 UTC three strong earthquakes took place in Bárðarbunga volcano. The earthquake at 13:09 UTC has registered magnitude of mb4,5 at EMSC (information here). The earthquake at 13:55 UTC also has the magnitude of mb4,5 at EMSC (information here). Icelandic Met Office has the earthquake at 13:09 UTC at magnitude Mw3,3 and the earthquake at 13:55 UTC at magnitude Mw4,1. The earthquake at 13:18 UTC has a magnitude of Mw3,4. Smaller earthquakes have followed the largest earthquakes.


The earthquake activity in Bárðarbunga volcano volcano. Copyright of this image belongs to Icelandic Met Office.

This earthquake activity is because of inflation in Bárðarbunga volcano. Since Bárðarbunga volcano continues to be in a inflation stage this earthquake activity did not result in a movement of magma or an eruption. Two of the earthquakes were in the regular location (central caldera and north-east part of the caldera) and the earthquake at 13:09 UTC took place outside the caldera and in north-west part of the volcano. This is slightly unusual based on earlier earthquake activity in Bárðarbunga volcano. Last strong earthquake in Bárðarbunga volcano was on 19-June-2019 and this a short time between strong earthquakes in Bárðarbunga volcano. This doesn’t seems to be unusual activity.

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Deep earthquake swarm south-east of Bárðarbunga volcano

Yesterday (19-June-2019) an earthquake swarm took place south-east of Bárðarbunga volcano. This area of Bárðarbunga volcano has been active since end of the eruption in February 2015 and possibly earlier than that. Last eruption in this area took place in with a start in February 1726 (+- 30 days) and ended in May 1726 (+- 30 days). More eruptions might have taken place at this location without being known or detected by people in the past.


The earthquake swarm south-east of Bárðarbunga volcano. Copyright of this image belongs to Icelandic Met Office.

The depth of this earthquake swarm is considerable. Deepest earthquake recorded had a depth of 30,4 km and it is a possible that might be an error or poor location, other earthquakes recorded had a shallower depth. The crust in this location is up to 45 km thick according to measurements. It is not possible to know if this earthquake activity is going to result in a eruption. If an eruption happens it might happen without any warning and not of lot of earthquake activity before it happens.

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Earthquake swarm south of Kolbeinsey island

Yesterday (27-May-2019) an earthquake swarm took place south of Kolbeinsey island, but this earthquake swarm is in Tjörnes Fracture Zone (TFZ). Largest earthquake had a magnitude of 3,5 at 01:35 UTC. Second largest earthquake had a magnitude of 3,1 and took place at 06:57 UTC. Other earthquakes in this earthquake swarm were smaller in magnitude.


The earthquake swarm in Tjörnes Fracture Zone (green stars). Copyright of this image belongs to Icelandic Met Office.

It appears that this earthquake swarm is over for now. It might start again without warning since earthquake activity in Tjörnes Facture Zone is unpredictable.

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Banner advertisements

I am going to add advertisement back to the website so I can at least get some extra income from this website when I don’t get any donations. This are going to be Amazon advertisements since I don’t have Google Adsense due to their now strict rules on doing things. Thanks for the understanding. This also applies to my earthquake monitoring website.

Earthquake swarm north of Kolbeinsey island

Yesterday (22-May-2019) at 15:47 UTC a magnitude 3,4 earthquake took place around 12 km north of Kolbeinsey Island. This earthquake was part of a small swarm in this area yesterday. It appears to be over but there is a risk of more activity in this area. Due to distance from the coastline and next populated island this earthquake was not felt.


Earthquake north of Kolbeinsey island (green star north of Iceland). Copyright of this image belongs to Icelandic Met Office.

Earthquake swarms happen in this area frequently. This is not part of the TFZ but borders it just a little south of this earthquake activity.

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Added

If you donate with a bank please update your information. I have changed the bank information again in April and the new information can be found here. The Icelandic bank account that I have been using is going to be closed soon.

Personal note

I have added a personal note on what is going on with me in the comments. It explains why I changed my mind on moving back to Denmark and other issues that I’ve been dealing with in recent months.

Updated at 13:45 UTC. Added updated information about bank donations.
Updated at 14:11 UTC. Added updated information about bank donations.

Earthquake activity on the Reykjanes ridge

This morning at 10:57 UTC (21-May-2019) a magnitude 3,1 earthquake took place around 7 km west of Geirfugladrangi (a rock). This earthquake was part of a small earthquake swarm in this area. Several magnitude 1,1 to 1,7 earthquakes took place in this location. Since 13:44 UTC the area has been quiet, due to distance from the coastline and the SIL network it is possible that more earthquakes have happened than are being recorded.


Earthquake activity on Reykjanes ridge. Copyright of this image belongs to Icelandic Met Office.

This is most likely rift zone earthquake activity rather than a volcano related earthquake activity. Earthquake activity is common in this area of the Reykjanes ridge.

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Increased activity in Askja volcano

After more than a month of no noticeable earthquake activity in Iceland there is finally something new to report. It remains quiet in Iceland and most earthquake activity today is just small earthquakes in the magnitude range of 0,0 – 2,8.

This is only my view and might not be the same as views of professional scientists that monitor volcanoes as their job.

Askja volcano has started showing clear signs that an eruption might happen in near future. When that might happen is impossible to know, but given recent history this might happen in 18 to 48 months time from writing of this article. It might also be a considerable longer time until a eruption happens. Current sequence of activity started in 2011 so its already been ongoing for a considerable long period of time.


The activity in Askja volcano. Copyright of this image belongs to Icelandic Met Office.

In recent months Askja volcano has been showing signs of increased earthquake activity. This is mostly small earthquakes with magnitude from 0,0 to 3,0 in magnitude. Located in small swarms that appear at random location within the volcano. There are quiet time period in this earthquake activity as is normal.

An eruption in Askja volcano is not a major risk to flight in Iceland or Europe. Since if an eruption happens it is going to be lava fissure eruption similar to what erupted in Bárðarbunga volcano in Holuhraun 2014 to 2015. That eruption might also have increased the speed of when Askja volcano is going to erupt. Since the dike intrusion from Bárðarbunga volcano almost started an eruption in Askja volcano, it was only two to three days from happening but stopped in its track before it happened. That might have put Askja volcano on a path of unsuitability that might now be starting to show in increased earthquake activity.

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