Magnitude 4,3 earthquake on the Reykjanes ridge today (19.04.2017)

Today (19.04.2017) at 12:34 UTC an earthquake with the magnitude of 4,3 took place on the Reykjanes ridge. This earthquake was felt in Keflavík town and nearby areas. A swarm of aftershocks followed, none of them was above magnitude 3,0. Largest aftershock had the magnitude of 2,9.


The earthquake swarm on the Reykjanes Ridge. Green star is the location of the magnitude 4,3 earthquake. Copyright of this image belongs to Icelandic Met Office.

This earthquake activity appears to be normal rifting activity in line with earlier earthquakes like this that have been happening deeper on the Reykjanes ridge over the past few weeks. There is a good chance that new earthquake activity is going to happen in this same area or nearby area in next days to months.


The earthquake as it appeared on my geophone in Heklubyggð. This image is released under Creative Commons Licence. Please see CC Licence website for more details.

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Posted in Earthquakes, Monitoring, Reykjanes Ridge, Rift Zone, Swarm, Volcano | 10 Comments

Strong earthquake swarm in Katla volcano today (19.04.2017)

Today (19.04.2017) a strong earthquake swarm started in Katla volcano. Largest earthquake in this swarm had magnitude of 3,0 and 3,1 other earthquakes that happened where smaller in magnitude. This is the strongest earthquake activity in Katla volcano since January 2017 when a magnitude 4,3 earthquake happened. No harmonic tremor was detected following this earthquake swarm.


The earthquake swarm in Katla volcano. Green stars show the magnitude 3,0 and 3,1 earthquakes. Copyright of this image belongs to Icelandic Met Office.

The earthquakes that I detected on my geophone in Heklubyggð show that the largest earthquakes was a mixed type of volcano earthquakes. This means that magma was responsible for today’s earthquake swarm. It was reported today in the news that this earthquake swarm took place away from all major hydrothermal areas inside Katla volcano caldera. The area of activity is close to eruption area of 1755 and a minor eruption close to current earthquake area in 1955 (didn’t break the glacier).


The main earthquake with the magnitude of 3,1 in Katla volcano. The trace is filtered at 4Hz due to high wind in the area. This image is released under Creative Commons Licence. Please see CC licence for more details.

This earthquake activity might just be a early signs of more activity to come. Since current pattern of activity has been going on since August-2016, with minor drop in activity between January to April. How this evolves depends on many factors that cannot be predicted due to lack properly documented earthquake history. Scientists know some details of Katla volcano eruptions behaviour, but those accounts are not fully accurate due to lack of knowledge at the time, currently the best documented eruption in Katla volcano is from 1918.

Article updated at 20:41 UTC. Correction made to the information about strongest earthquake. I recalled that detail wrongly.

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Posted in Earthquakes, Katla / Mýrdalsjökull, Magma, Monitoring, Swarm, Volcano | 12 Comments

Earthquake swarm in Bárðarbunga volcano

Today (17.04.2017) at 11:58 UTC a magnitude 4,2 earthquake took place in Bárðarbunga volcano. This is the strongest earthquake in Bárðarbunga volcano for several weeks now. Following this earthquake a earthquake swarm started and lasted for about one hour in Bárðarbunga volcano.


Green star shows the magnitude 4,2 earthquake in Bárðarbunga volcano. Copyright of this image belongs to Icelandic Met Office.

Largest aftershock activity had magnitude of 2,8 as the information is currently on Icelandic Met Office website. That might change tomorrow and it’s possible that I might update this article if any major change happens in earthquake magnitudes. No harmonic tremor was detected following this earthquake swarm. Weather is currently bad in Iceland and that’s going to last for few more hours.

Posted in Bárðarbunga, Earthquakes, Inflation, Magma, Monitoring, Swarm, Volcano | 7 Comments

Magnitude 4,5 earthquake on Reykjanes ridge during the night

During the night of 10-April-2017 at around 03:39 a magnitude 4,5 earthquake happened and started a earthquake swarm at same location, total number of recorded earthquakes is around 71 but that number is not confirmed as of yet. There is also a good chance a few magnitude 3,0 earthquakes happened, but this earthquake swarm has not been reviewed by Icelandic Met Office as of yet (I don’t know why it’s slow today).


The earthquake swarm as it appears on Icelandic Met Office maps, green star is the location of the magnitude 4,5 earthquake. Copyright of this image belongs to Icelandic Met Office.


The earthquake as it appeared on my geophone in Heklubyggð. This image is under Creative Commons licence. Please see CC licence for more details.


The earthquake as it appeared on my geophone in Heklubyggð. This image is under Creative Commons licence. Please see CC licence for more details.

This appears to be a normal tectonic earthquake in the rift valley that is at this location. No change was observed in the harmonic tremor, that means there was no magma movement during this activity. Based on earlier earthquake behaviour in this area, there is a good chance that new earthquake swarm is going to happen in this area after few days or at most weeks before this area going quiet again.

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Posted in Earthquakes, Kolbeinsey Ridge, Monitoring, Swarm | 15 Comments

Strong earthquake swarm in Bárðarbunga volcano

Today (6-April-2017) a strong earthquake activity took place in Bárðarbunga volcano. This earthquake activity started this morning at 10:46 UTC and has continued during the day at slow phase. The largest earthquake so far took place at 15:08 UTC and had magnitude of 4,1 and second largest earthquake had a magnitude of 3,2. Other earthquakes are smaller and a around dozen or so have taken place today in Bárðarbunga volcano.


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

This earthquake activity is in line with earlier earthquake activity that has been going on in this area since September-2015. What is slightly different now is that I got two different seismic signals on my geophone stations in Böðvarshólar and the one in Heklubyggð on the North-South direction (Heklubyggð is west-south of Bárðarbunga, Böðvarshólar is west-north of Bárðarbunga). This difference seems to suggest that some type of slip movement took place during this earthquake. I don’t know for sure what this change in pattern means at the moment. The best I can do now is to monitor the earthquakes I detect in the future for more such earthquake signal changes like I did just see on my geophone. I’m not fully sure what is going on in Bárðarbunga volcano at the moment, what is known is that inflation is currently taking place in Bárðarbunga volcano and that process has been ongoing since September-2015.

Update 07.04.2017 – Anomaly detected on my Böðvarshólar geophone

This is the anomaly detected on my Böðvarshólar geophone. It can be seen on N-S direction. This is not the geophone, its working as expected and that got confirmed today when a minor (magnitude 2,1) earthquake took place not far from the Böðvarshólar geophone.


Böðvarshólar geophone.


Heklubyggð geophone.


Detailed image of the earthquake at Böðvarshólar geophone.


Detailed image of the earthquake in Heklubyggð geophone.

The difference is appearance of the P-wave and the S-wave. I don’t know why this is or why it happened. I’ve not seen this before.

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Article updated at 21:32 UTC on 07.04.2017.

Posted in Bárðarbunga, Earthquakes, Magma, Monitoring, Swarm, Volcano | 10 Comments

Please remember to support my work with donations

April-2017 is going to be one of those awful bill months for me. As it currently stands I’m in the negative once all the bills are paid. Without donations I would not be able to keep this website running as things currently are. The good news is that this type of situation (me being completely broke) is going to happen less or not at all after June-2017 when the worst of my payment of my debt is over. Then the amount of payment I’m doing monthly is going to drop a little and it is also going to help that I’ve cancelled my cable subscription for good (it’s just useless reruns with advertisements most of the time). The reason for my problem this month is the cable bill, in Denmark they have the bad habit (in my view) of billing people for up to 6 months at the time for a bill (mostly new subscribers), with normal period being 3 months. Currently for me it is difficult to deal with this. I did try to save money for this bill, but that didn’t work out due to other bill where I’m charged for 6 months at the time (this is a bill that I can’t skip or cancel, since this trash collecting and such service).

I take writing on this website seriously as I do with any other job that I have worked in the past. As such I spend most days watching what is happening in Iceland, if not at home, then when I’m outside. Most of the time, as long time readers of this website know, everything is quiet in Iceland most of the time. Unlike many other websites. I don’t have windows jumping at readers when they leave this website with messages like “subscribe to our mail list” or something of that nature. I also try keep advertisement in a such way that I get paid and people can buy stuff from Amazon if they want to and and at the same time without being annoying.

My current financial problems are coming to and end in next few months. They should end by August-2018 I hope if everything goes according to a plan. After that I’ll have less problems, but due to my low income at the moment, I’ll always have some issues with money. Thanks for the support. 🙂

Posted in Donations, Website | 18 Comments

Minor earthquake activity in Hofsjökull volcano

On the 30th of March-2017 there was some minor earthquake activity in Hofsjökull volcano. This was a minor earthquake activity, with the largest earthquake having the magnitude of 1,3 at depth of 4,5 km. The deepest earthquake had magnitude of 1,0 and depth of 10,1 km.


Earthquake activity in Hofsjökull volcano. Copyright of this image belongs to Icelandic Met Office.

I’m not expecting anything more to happen in Hofsjökull volcano. This volcano does not have any known eruption during the last 12.000 years that I know of. I don’t know what the latest research into activity in Hofsjökull volcano says, I was also unable to find any information about possible time frame when last eruption took place in Hofsjökull volcano. As it currently stands, I don’t expect anything more to happen besides maybe one or two extra earthquake appearing in Hofsjökull volcano.

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Posted in Earthquakes, Hofsjökull, Monitoring, Swarm | Comments Off on Minor earthquake activity in Hofsjökull volcano

Strong earthquake swarm 80 km north of Kolbeinsey Island

During the night of 26-March-2017 there was an strong earthquake swarm about 80 km north of Kolbeinsey Island. This is around 250 km from the coast in north Iceland. It is not clear what is happening in this location, since this area has been seeing higher than usual earthquake activity in recent months. This is the largest earthquake swarm so far to take place.


The earthquake swarm as it appears on Icelandic Met Office maps. Green stars are earthquakes with magnitude above 3,0. Copyright of this image belongs to Icelandic Met Office.

Largest earthquakes in this swarm had the following magnitudes. Magnitude 4,6 (EMSC Information here), magnitude 5,0 (EMSC information here), magnitude 4,8 (EMSC information here). The largest earthquakes where not felt due to distance from the coast. It is not possible due to distance to see if there is an eruption taking place at this location. All harmonic tremor get lost due to distance from nearest SIL station. A really large eruption might slightly appear on tremor plot on Icelandic Met Office website, at the moment that has not happened.


The magnitude 5,0 earthquake as it appeared on my geophone in Böðvarshólar. This image is under Creative Commons Licence, please see CC licence for more details.


The magnitude 5,0 earthquake as it appeared on my geophone in Heklubyggð. This image is under Creative Commons Licence, please see CC licence for more details.

It is difficult to know if an earthquake activity is continuing in this area or not. Since the distance from nearest SIL stations does not allow for micro-earthquakes to be detected properly or at all.

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Posted in Earthquakes, Kolbeinsey Island, Kolbeinsey Ridge, Monitoring, Swarm | 13 Comments

Slight increase in earthquake activity in Grímsvötn (Grímsfjall) volcano

Over the past few months there has been a slight increase in earthquake activity in Grímsvötn (Grímsfjall) volcano. This increase in activity strongly suggests that Grímsvötn are now in later stages of getting ready for an eruption.


Earthquake activity in Grímsvötn (Grímsfjall) volcano. Close to centre in Vatnajökull glacier. Copyright of this image belongs to Icelandic Met Office.

Last eruption in Grímsvötn volcano was in 2011 and that was a VEI=4 eruption and the largest one in at least 140 years. I don’t expect next eruption in Grímsvötn to be a big one, but there is no way to know that for sure until an eruption happens. When that happens is impossible to know for sure. When next eruption happens is something that is not possible to know. All that can be estimated that a new eruption in Grímsvötn volcano is not far into the future.


This graph gives a good idea the time interval betweens eruptions (last eruptions since 2000). Copyright of this image belongs to Icelandic Met Office.

Since 2000 the time between eruptions is around 2200 days on average. That number of days is about to happen soon in Grímsvötn volcano.

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Posted in Earthquakes, Grímsvötn / Grímsfjall, Monitoring, Volcano | 9 Comments

Earthquake swarm in Bárðarbunga volcano 21-March-2017

Yesterday (21-March-2017) there was an earthquake swarm in Bárðarbunga volcano. Largest earthquakes where magnitude 3,1 and 3,0. Other earthquakes that happened where smaller in magnitude.


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

There isn’t much to say about this earthquake activity (for those how do not know, please check older articles on Bárðarbunga volcano). This activity is happening due to continued inflation of Bárðarbunga volcano since the eruption ended in February-27 in 2015, inflation started in September that same year. Earthquake activity had started to drop in February, it now appears to be increasing again. When or if that results in a eruption soon is impossible to know.

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Posted in Bárðarbunga, Earthquakes, Magma, Monitoring, Swarm, Volcano | Comments Off on Earthquake swarm in Bárðarbunga volcano 21-March-2017