Category: Earthquakes

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Minor earthquake swarm in Katla volcano

Today (21-June-2013) there was an earthquake swarm in Katla volcano, this earthquake swarm took place in the same area where the minor eruption in the year 2011 (July) took place and created a minor glacier flood down Múlakvísl river. So far there is nothing that suggest a eruption is about to take place in Katla volcano, this activity needs to be monitored closely since things can change quickly in Katla volcano.

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Earthquake activity in Katla volcano on 21-June-2013. Copyright of this image belongs to Icelandic Meteorological Office.

This earthquake activity in Katla volcano starts around the same time as it did two years ago (2011), but then earthquake activity started on 17-June-2011 and continued until July-2011 and did not end until November-2011. This type of earthquake activity did also take place in June-2012, but no eruption did take place that summer. I expect this earthquake activity to continue in Katla volcano for the time being, sine most earthquake activity always happens during the summer in Katla volcano. It is unclear that is creating this earthquake swarm, it can be anything from pressure changes in hydro-thermal zones in this area, or magma injections at depth, I do not think any dike intrusions have taken place so far in Katla volcano.

Currently there is nothing that suggests eruption is going to take place soon in Katla volcano.

Blog post updated at 22:06 UTC on 21-June-2013.

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Fresh dike intrusion into Bárðarbunga volcano

Interesting earthquake activity continues in Bárðarbunga volcano. There is also interesting earthquake activity taking place in Hamarinn volcano. The source of this activity is magma dike activity in Bárðarbunga volcano. It is most likely not going to result in a eruption, but might be a sign of more activity in the future.

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Activity in Bárðarbunga volcano. Copyright of this image belongs to Icelandic Meteorological Office.

There has also been activity in Hamarinn volcano, I do not know if it is connected with the activity in Bárðarbunga volcano. I find it unlikely to be the case, but I cannot rule it out at current time. It is unclear if this is new earthquake activity, it might be as simple as new SIL stations in the area, or this could be real activity increase in the area close to Hamarinn volcano. I am currently not clear on this detail as is. Last eruption in Hamarinn volcano was in July 2011, I did write about it here. It is worth keeping a eye on this activity in the Hamarinn volcano, it has proven to be a unpredictable volcano and it appears that magma is at shallow depth in it.

Blog post updated at 23:32 UTC on 20-June-2013.

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Minor earthquakes in Katla and Bárðarbunga volcanoes

There has been minor earthquake activity in Bárðarbunga volcano and Katla volcano for the past few days. This is just a short overview of this earthquake activity.

Bárðarbunga volcano

A minor dike intrusion took place in Bárðarbunga volcano on 18-June-2013. This was a small earthquake swarm, with largest magnitude at 1.2, the most depth in this earthquake swarm was at 24.3 km. So this was most likely a magma dike formation.

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The magma dike earthquakes form a nice line on this IMO map. Copyright of this image belongs to Icelandic Meteorological Office.

Katla volcano

A minor earthquake activity has been taking place in Katla volcano for the past few days. So far it does not mean anything, this is most likely a summer related earthquake activity as glacier weight gets less on Katla volcano during the summer. Some deep earthquakes have been taking place in Katla volcano, it is unclear if they are sign of anything at this stage. This is most likely a some magma dike intrusion at depth, it happens commonly in Katla volcano without resulting in a eruption.

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Activity in Katla volcano. Copyright of this image belongs to Icelandic Meteorological Office.

Other then minor activity, it is rather quiet in Iceland at the moment. With no special activity taking place currently.

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More frequent earthquake swarms expected in Tjörnes Fracture Zone

According to a news on Rúv.is, there is now a risk of more frequent earthquake swarms in Tjörnes Fracture Zone. This is due to the tension that has been building up in Tjörnes Fracture Zone for the past 200 years, with the last large earthquake taking place 37 years ago (Kópasker magnitude 6.5 earthquake in January 1976). This short and small earthquake swarms in TFZ are not going to release the tension that has been building up there for the past 200 years (in some areas), for that too happen. It takes one or more earthquakes that are stronger than magnitude 6.0 to take place before tension starts to drop in the Tjörnes Fracture Zone.

Icelandic news about this

Útlit fyrir tíða skjálfta fyrir norðan (Rúv.is)

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Interesting earthquake swarm south of Grímsfjall volcano

Interesting earthquake activity took place in Vatnajökull glacier today (03.06.2013). This earthquake activity took place just south of Grímsfjall volcano, that last erupted in the year 2011.

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The earthquake activity south of Grímsfjall volcano. Copyright of this image belongs to Icelandic Meteorological Office.

This earthquake activity is interesting, since it started after the eruption in Grímsfjall volcano at that area. It has been suggested that this activity is due to stress changes in this are, following the eruption in Grímsfjall volcano in the year 2011.

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Earthquake activity in the same area in week 21 in the year 2011. Copyright of this image belongs to Icelandic Meteorological Office.

I am not sure what is going on in this area, no volcano is known, or volcano fissure is known in this area. But that might well just be because this area is covered with a thick glacier. What makes this also interesting is the fact this area has been having earthquake activity since the year 2011 and there doesn’t seems to be any end in sight. This is clearly something worth keeping a eye out for, even if nothing happens in this area for a long time.

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Minor earthquake swarm on the Reykjanes Ridge on the 29th of May

On the 29th of May (2013) a minor earthquake swarm took place on the Reykjanes Ridge. The largest earthquake in this swarm had the magnitude of 2.3, the depth range in this earthquake swarm was about 5.5 to 12 km. This was just a minor earthquake swarm, it also did not last long.

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The earthquake swarm on the Reykjanes Ridge on 29th of May 2013. Copyright of this image belongs to Icelandic Meteorological Office.

This area of the Reykjanes ridge is highly active, only about three weeks ago there was a strong earthquake swarm in this area. This might just be a aftershock activity from that, it is however difficult to know for sure. I am expecting more earthquakes in this area in next few weeks to months.

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Earthquake swarm on Reykjanes Ridge on 19th of May, increased volcano monitoring in Iceland and more

I am sorry for lack of blog posts for the past few days, the reasons for this lack of blog post is that it has been quiet in Iceland for past two weeks. Money issues have also been heavy on me for the past few months and it drains you slowly, but it does drain you in the long run. This has affected my writing in the short term, both here on this blog and what I am creating in my short stories and books, so this have become self feeding circle that is hard to break out of, I just hope to break out of it soon. I did get a large donation this month, it has helped me greatly in paying down some of my debt and in the progress lower my monthly payments down a little. I also got a help from people I know here locally (this was before I got the donation and was expecting to survive on €30 for the rest of this month).

Some of my loans are also going to be paid up soon, I for instance only have three payments left on my washing machine. With the last payment due to take place in August. This is going to make my life a bit more easy, since it lowers my payment threshold a bit. I still have some big debt to pay down and it is going to take some time to pay it down. Since my social welfare from Iceland is low and I do not expect it to improve any time soon. I am going to pay down my debt faster as my income increases, but it might take a while until that happens.

Getting into money issues have been a bit of a drag for me, not surprising since often I have had no money for food in the past several months (8 months as it now stands). Some months have been worse then others, this is not a budget issue as such. I am currently having stripped budget and not spending anything extra if I can avoid it. This is going to be a temporary measure for me, I am going to end it once my income has increased to such levels that I am no longer poor. When that is going to be I do not know, it depends on how my books and short stories are going to be doing in the book market, the book market is not a easy market to work with. Since there are many writers out there and a lot of publishing taking place every day of the year.

As for moving again, it is not going to happen for the next few years. Since I am going to stay here in Bov, Padborg for the next few years, I might in the end just stay here for the rest of my life. I am not sure what I am going to do in the long run. I often change my mind, since I sometimes have issues with figuring my self out. I am bit open about it, and that bother some people who do not like my sudden change of heart.

Earthquake swarm deep on Reykjanes Ridge on 19th of May

During late night on 19th of May a magnitude 4.2 earthquake too place deep on the Reykjanes Ridge, a total of three to four earthquakes where detected on my geophone network at the time. I do not have exact magnitude for those earthquakes, I am guessing there magnitude was around 2.9 to 3.5 at least, it is not confirmed as is and it might never be confirmed. EMSC has more information on the magnitude 4.2 earthquake here.

Increased volcano monitoring in Iceland

BBC News has interesting news article about increased volcano monitoring in Iceland, due to the eruption of Eyjafjallajökull volcano in the year 2010. There is a ongoing project in Iceland with BGS and IMO to increase the monitoring of Iceland volcanoes, I do not know what volcanoes they are going to increase the monitoring. It can be assumed it is going to be the most active ones, Katla, Hekla, Grímsfjall and so on. I do not know what they are going to do about less active volcanoes like Snæfellsjökull and other volcanoes in that area, currently Snæfellsjökull volcano is not being monitored at all, or other volcanoes on the Snæfells peninsula. This increased monitoring of volcanoes in Iceland is going help detect when volcanoes are ready to erupt, or just play a simple bluff on the monitoring system.

The BBC News can be found here below. I recommend watching the video that is with this news article.

Volcano project scours Iceland for early warning signals (BBC News)

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Strong earthquake swarm on the Reykjanes Ridge

Last night a earthquake swarm started on the Reykjanes Ridge, this earthquake swarm started slowly with just few minor earthquakes. It however did pick up later today with stronger earthquakes and more activity. Strong earthquakes in this swarm so far have had the magnitude 4.5 and 4.7 according to USGS/EMSC. There have been over 10 magnitude 3+ earthquakes, there is also a chance of more earthquakes with the magnitude above 4.0+ in next few hours to days. According to Icelandic Meteorological Office, there have been over 310 earthquakes in this area today (my counter is still offline, more on that later in this blog post).

This earthquake swarm has been showing the pattern of stopping and then continue for few hours, and repeating this pattern. This sometimes happens in earthquake swarms on the Reykjanes Ridge, why that is I do not know. Last eruption in this area was sometimes on the 18th or 19th century I think. If this activity is connected to volcano activity it is too early to know at the moment, at the moment there is nothing that suggest that is the case. That might however change without a warning if that is the case. This volcano is located out in the ocean, so it is poorly monitored so current status of it is impossible to know for certain. Currently there are no harmonics being detected, just normal earthquake activity and nothing else.

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Earthquake swarm on the Reykjanes Ridge. Copyright of this image belongs to Icelandic Meteorological Office.

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Trace showing how the evolution of the earthquake swarm has been for the past few hours.Copyright of this image belongs to Icelandic Meteorological Office.

It is difficult to know for sure what happens next in this earthquake swarm. It is clear for the moment that this earthquake swarm is in full force as is, so more earthquake activity is to be expected. This earthquake activity can be monitored here, on my webicorder web site. It is updated every 5 min.

Other

I am sorry for this late blog post, but I always use some time to see how earthquake swarm evolve and what happens in them before I write, unless there is a really big earthquake with magnitude 50 or larger.

I have also been busy today trying to get my server computer back up and running, it has been working somewhat but I had to start from scratch again due to technical issues with few things. I am running FreeBSD on my server computer now. Since I am moving away from Linux solutions and it has been more of a challenge then I expected. I hope to have everything worked out now, so I hope to have my server computer up and running properly tomorrow. Since I know what I did wrong first time around and I did avoid it this time around, so I am not expecting any problems in setting up FreeBSD properly this time around.

I also want to point out that donations help me running this blog, since my financial status is not as strong that I wanted it to be. Thanks for the help.

Blog post updated at 13:26 UTC on 11. May 2013.

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Earthquake in Hekla volcano

Today (04.05.2013) at 05:06 UTC a magnitude 1.5 earthquake took place in Hekla volcano. This earthquake had the depth of 7.8 km. No other earthquakes have so far taken place following this earthquake and no change has taken place in tremor plots around Hekla volcano. This earthquake follows a pattern of earthquakes that have been taking place in Hekla volcano for the past several weeks.

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The earthquake in Hekla volcano. Copyright of this picture belongs to Icelandic Meteorological Office.

My Heklubyggð geophone is currently offline due to network problems in the area. I do not know when they are going to be resolved, it might take few days. Data is being recorded currently if the computer that handles this task is up and running.

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Earthquake swarm deep off the south coast of Iceland

Yesterday (02.05.2013) at 06:08 UTC there was a earthquake swarm deep off the south coast of Iceland. This earthquake swarm was around 300 km south of Iceland. I do not know if there are any volcanoes in this area, at least nothing is documented. Depth of the ocean in this area is around 3 to 4 km, or more. Icelandic Meteorological Office did register two earthquakes from this area. The location is a good estimate at best. Since the SIL network has problems locating earthquakes this far out in the ocean.

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The green star marks the location of this earthquake swarm. Copyright of this picture belongs to Icelandic Meteorological Office.

I did record this earthquakes on my geophone network. This earthquake activity was clearly seen on Skeiðflöt geophone stations, but also in Heklubyggð geophone stations. The data from my geophone network suggests that this earthquake had stronger magnitude then ML3.0 as it is registered with Icelandic Meteorological Office. Estimating magnitude of earthquake this far away from the SIL network is difficult at best, so its magnitude is at best too low. I do not know by how much it is.

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The earthquake as it did appear on Skeiðflöt geophone station. This image is released under Creative Commons licence. Please see licence page for more details.

It is possible that more earthquakes did take place in this location. The SIL network did record one (and my geophones too) at 03:56 UTC, that earthquake was smaller but at the same location. So this was most likely a earthquake swarm taking place in this location. I do not know if there are any volcanoes in this area, it might well be. If that is the case, it is unknown and undocumented as is and is going to be that for a while now.