Yesterday (23-April-2015) there where deep earthquakes in Katla volcano. So far only six deep earthquakes have been recorded. The deepest earthquake had the depth of 26,6 km. The largest earthquakes in this swarm had the magnitude of 2,2.
Earthquake activity in Katla volcano. Copyright of this image belongs to Icelandic Met Office.
Earthquake activity at this depth is rarely due to tectonic activity, it is mostly due to magma movements or pressure changes of the magma. It is impossible to know for sure what is going on. No harmonic tremor was detected following this earthquake activity and there is nothing suggesting anything else then just earthquake activity in Katla volcano at the moment.
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Article updated at 16:21 UTC.
At the moment everything is quiet in Iceland. This happens and is the normal state in Iceland, even if Iceland is on top of hot spot and a rift zone. No earthquakes swarms are taking place, at least no major activity and Bárðarbunga volcano is quiet at the moment.
Future of my geophone network
I’ve figured out what I am going to do with my geophone network once I move back to Denmark in the year 2017 or 2018 (moving year is going to depending on my saving, it might happen sooner if I’m lucky). It is extremely difficult to maintain and keep my geophone network running when I move back to Denmark. So I am going to close it down for good. Running a remote network also makes it difficult for me to maintain it if a hardware failure takes place (and that is going to happen). The only geophone station that I can keep running after the year 2017 or 2018 is going to be the geophone in Heklubyggð and I am not sure for how many more years that station is going to last. What is important here is that I am running this geophone network on goodwill of people only, for things like housing and electricity. When people life change I often can’t keep my hardware (the geophone) up and running where they are. Doing so from Denmark complicates matter even more, since guidance over the telephone to fix a problem is difficult and often impossible to do from Denmark. Since I need to be around to replace the hardware that failed.
I am not going to stop recording earthquakes. I am just going to do so from Denmark. While I am won’t record as many earthquakes as in Iceland I am going to record any larger earthquakes (magnitude 6,0+) in Greece and other parts of south Europe. I would also record any earthquake in Denmark that goes above the noise threshold (it is high due to road traffic and trains).
My current backlog of earthquake data is now around 5 or 6 years, since past few years have been busy. Both for me and Iceland in terms of earthquake activity. Since I started recording earthquakes in the year 2006 I have recorded around 20.000 earthquakes and that number continues to go up with every year. Just in Bárðarbunga volcano activity in 2014 – 2015 I added around one year worth of earthquake data in less then six months. In any given earthquake swarm in Iceland I add from 100 and up to 1.000 earthquakes if the activity is close to my geophone or strong enough to be seen clearly on them, that is not always the case if the earthquake swarm that is taking place is a micro-earthquake swarm with earthquakes with magnitudes 0,0 – 2,0.
My geophones can be viewed here.
Donations: Even if it is quiet I am always in the need for donations to keep this website running and being able to do something. People can donate with the PayPal button or by buying stuff from Amazon (if needed). Thanks for the support.
I don’t want to add long none-volcanic articles to this website. I did not want to do so due to length and the subject in question, so I did write it on my website called “Jón Frímann bloggar” and it can be found here. Please read it if you can.
New geophone going to be added
I plan on adding a new geophone to Hvammstangi soon. I don’t have exact date yet. This just using current hardware that I have to set-up this new station. I did get a computer to do this. It is just missing the hard drive and needs more ram and some version of Windows (maybe Win 8.1). I am looking into that cost, but at the moment I can’t afford it. This means that while I am going to be living in Hvammstangi there are going to be two geophones active in that area, once I get the other one up and running, allowing for higher resolution of any earthquakes that might take place in nearby area. I always have a geophone with me where I live to record earthquakes. Updates to webicorders website are going to uploaded soon, once I have finished working and updating it.
PayPal buttons and donations
Please remember to support my work with donations or by buying from Amazon if you can. If you can’t, don’t worry about it. I know that not all of the people who read this website can afford supporting my work and that is good too. I have now updated the donations button to my Danish Paypal account, the text once the button is clicked should be in English. If people want to donate more then 500€ please do so directly with your bank, since PayPal might not allow that high amount go trough my account at present time, since my Danish PayPal account is new and lacks one verification at current time. Information on how to donate directly with your bank information can be found here. Thanks for the support.
Article updated at 03:33 UTC on 12-April-2015.
According to a short news today on Rúv it appears that Bárðarbunga volcano has stopped deflating and activity is slowing down in new hydrothermal vents that opened up during the most active period of Bárðarbunga volcano. The rift activity that has started in this region of Iceland is not over yet, even if there is nothing happening at current time.
It is impossible to know when next period of eruptions starts in this area. Until then it is going to remain mostly quiet.
Sigið í Bárðarbungu er hætt (Rúv.is)
During the night of 9-April-2015 an earthquake swarm started on Hekla volcano – SISZ boundary. This has been for most part a minor earthquake swarm so far. With largest earthquake only having the magnitude of 2,8. This earthquake activity has appeared clearly on my Heklubyggð geophone.
The earthquake swarm is located north of Mýrdalsjökull and Eyjafjallajökull. South of Hekla volcano. Copyright of this image belongs to Icelandic Met Office.
This earthquake swarm appears to be tectonic in nature. This means there is a higher chance it might be related to stress changes in SISZ (South Icelandic Seismic Zone), rather then any activity in Hekla volcano. There is little chance in my view that this activity is going to trigger any eruption in Hekla volcano, I just can’t rule it out at the moment. Currently it appears that this earthquake swarm is ongoing. This earthquake swarm doesn’t appear to be moving quickly at the moment, that might change but I am doubtful that is going to happen while minor earthquakes are just taking place. If stronger earthquakes start to happen this minor earthquake swarm might grow into a middle sized one or a big one. Largest known earthquakes in this area have reached magnitude Mw7,0. Such earthquake has not taken place in this part of SISZ for the past 103 years. Currently there is nothing indicating that earthquake with that type of magnitude is about to take place.
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Article updated at 00:20 UTC on 10-April-2015.
Today (31-March-2015) there has been a minor earthquake swarm in Krísuvík volcano. Total number of detected earthquakes was 27 so far.
The earthquake swarm in Krísuvík volcano today. Copyright of this image belongs to Icelandic Met Office.
Largest earthquake in this swarm had the magnitude of 2,6 according to reviewed results from Icelandic Met Office. Other earthquakes where smaller in magnitude. This is just tectonic activity at the moment. There has been inflation and deflation taking place in Krísuvík volcano for past several years and such activity is known to start strong earthquake activity in both deflation and inflation stage. At the moment there is nothing suggesting there is an eruption imminent in Krísuvík volcano.
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Today (28-March-2015) there has been deep earthquake activity in Bárðarbunga volcano. This suggest that there is a fresh injection of magma into Bárðarbunga volcano system. If this is going to result in new eruption remains to be seen. It is not impossible at current time to happen. So far however nothing has happened. Deepest earthquake had depth of 21,1 km, others earthquakes are shallower.
Earthquake activity in Vatnajökull glacier today. Copyright of this image belongs to Icelandic Met Office.
Today (28-March-2015) there has also been deep earthquake activity in Öræfajökull volcano [Wikipedia link here]. This activity is not new and has been taking place every few months for the past 10 years or so. Quiet times are different in length. Each earthquake swarm that takes place is different in both magnitude and length, current activity appears to be deep, but mostly small earthquakes, less then magnitude 1,5 for most part. Deepest earthquake in this swarm had the depth of 25,0 km. This earthquake activity is only due to fresh magma entering Öræfajökull volcano system, not tectonic activity in this area due the depth of the earthquakes are taking place.
Based on historical accounts of earlier eruptions (1362 and 1728). It appears that eruptions in Öræfajökull start with powerful earthquake swarm (magnitude 4,0+ earthquakes). The following eruption is an ash cloud one with glacier floods taking place, with that phase lasting up to 48 hours. What happens after that is unclear, since it was not documented properly by historical records (at least not properly mentioned or lost due the old age of the historical records in question). Eruptions can last for up to 45 days, based on earlier documented eruptions. Current earthquake swarm is inside Öræfajökull volcano, since it is not round volcano, but goes a little to north where the earthquake swarm is taking place. There is no fissure swarm connected with Öræfajökull volcano, it does not rule out that one exist, it is at least not known at the moment. At the moment there are no clear sign that there is increased eruption risk from Öræfajökull volcano. That might change without warning, as is always the risk with volcanoes.
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Due to risk of landslide a viewing area in northern Skagafjörður has been closed. Tip of a cliff in the area is about to break off at any time and without warning and there appears to be considerable area getting ready to go forward into the coast line below. Please see attached news for pictures.
Útsýnisstað lokað vegna öryggisástæðna (Vísir.is, Pictures)
Hættulegar sprungur í Ketubjörgum (Skagafjörður.is, images)
Lokuðu vinsælum útsýnisstað í Skagafirði (Rúv.is, Images)
Since yesterday (26-March-2015) a minor earthquake swarm has been taking place in Hekla volcano. This has not been continuous earthquake swarm and there has not been huge number of earthquakes taking place. Largest earthquake had the magnitude of 1,4.
The earthquake activity in Hekla volcano. Copyright of this image belongs to Icelandic Met Office.
This earthquake activity took place deep inside Hekla volcano, with the deepest earthquake being on 17 km depth (mag 1,4). Other earthquakes took place on shallower depths, but all depths where greater then 10 km. What exactly is happening I do not know, at this depth it is possible the earthquake activity taking place is due to magma movement rather then tectonic changes. I don’t expect any eruption to take place in Hekla volcano at current time.
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During the night (on 21-March-2015) a minor earthquake swarm took place close to Eldeyjardrangar on Reykjanes ridge. Largest earthquake in this swarm had the magnitude of 3,2. Total number of earthquakes in this swarm was around 30.
Earthquake swarm close to Eldeyjardragnar. The green star shows the magnitude 3,2 earthquake. Copyright of this image belongs to Icelandic Met Office.
Earthquake swarms like this are common in this part of the Reykjanes ridge. It is difficult to know if more earthquake activity is going to take place soon.
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Article updated at 20:01 UTC.