Category: Monitoring

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Minor earthquake swarm on TFZ

Today (14-November-2016) a minor earthquake swarm started on TFZ (Tjörnes Fracture Zone). Largest earthquake so far has the magnitude of 3,2, other earthquakes have been smaller in magnitude.

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

So far this earthquake swarm has not been big and it doesn’t look like its going to develop into a big earthquake swarm at the moment. In other parts of Iceland everything is quiet, with just one off or few earthquakes happening in each location.

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Magnitude 3,5 earthquake in Bárðarbunga volcano

Today (11-November-2016) a magnitude 3,5 earthquake took place in Bárðarbunga volcano. This earthquake, like so many before it, is due to inflation of the volcano that started in September-2015. This is going to be happening for a long time now, since last earthquake sequence that started this way started in 1973 and lasted until 1996 (science paper on it can be found here). After that it was quiet for few year until 2010-ish years before the eruption started in 2014.

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

This inflation and earthquake activity is going to lead to an eruption one day. When that is going to happen is impossible to know until it happens.

Donations

Please remember to support my work. It helps me paying the bills and working on this website and other things when activity is quiet in Iceland. Thanks for the support. 🙂

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Minor earthquake activity in Esjufjöll volcano

For the few hours (on 05-November-2016) there has been a minor earthquake activity in Esjufjöll volcano [Wikipedia information]. Esjufjöll volcano is not a volcano that gets a lot of attention because most of the time its completely quiet, with last notable activity taking place in the year 2013. Earthquake activity started to appear in Esjufjöll volcano in the year 2002 (IMO map here and here).

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Earthquake activity in Esjufjöll volcano (north east of Öræfajökull and south of Grímsvötn volcanoes). Copyright of this image belongs to Icelandic Met Office.

At the moment not many earthquakes have taken place in Esjufjöll volcano. That might maybe change, but I don’t expect it to. Maximum number of earthquakes recorded so far (in 2002 at least) is around 40 – 80 (I’m not sure to the exact number). The reason why Esjufjöll volcano is having earthquake activity is due to fresh magma pushing up the volcano from deep inside it. At the moment there isn’t anything suggesting that an eruption is about to happen and if an eruption does happen I would not expect it to be big. The chance of an eruption taking place in Eskjufjöll volcano is around ~2% at the moment in my view.

The only eruption that might have happened took place in the year 1927, at the moment it has not been confirmed. It may have only been active for around 4 days at maximum and took place on September 5. The information is not that good due to how remote this volcano is (map can be found here, Esjufjöll are located south of Grímsvötn, north-east of Öræfajökull volcano).

Donations

Please remember to support my work. In November I’m rather broke due to many and high bills that I had to pay this month. Thanks for the support. 🙂

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All quiet in Iceland at the moment

Over the past three weeks things have been mostly quiet in Iceland. With no major activity taking place. There have been few magnitude 3,0 and above earthquakes. Over the past three weeks the average number of earthquakes over 24 hour period is just 10 earthquakes. This is based on my automatic counter and it has slightly lower number than manually checked earthquakes. Icelandic Met Office says there are around 300 – 400 earthquakes taking place in Iceland during the week (1200 earthquakes at month).

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The earthquake activity in Iceland at the moment. All quiet at the moment. Copyright of this image belongs to Icelandic Met Office.

It is not possible to know for how long this quiet period is going to last. Its already been three and almost four weeks already into this quiet period. All that can be done now is to wait and relax a little.

Donations

Please remember to support my work. I spend a lot of time writing to this website and its a lot of work. There is always something going on in Iceland, even during the quiet periods. Thanks for the support. 🙂

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Earthquake activity in Bárðarbunga volcano (Week 43)

On 27-Oktober-2016 at 02:08 & 02:09 UTC an magnitude 3,5 and 3,3 took place in Bárðarbunga volcano. During the day several smaller earthquakes happened in the same place in the Bárðarbunga volcano (close to North-East of the caldera).

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

Currently Bárðarbunga volcano is inflating with fresh magma from deep mantle. This process started in September-2015 and is going to continue until a new eruption starts from Bárðarbunga volcano (or in Bárðarbunga volcano).

Italy earthquakes

Since I’m living in Denmark I did record the earthquakes in Italy. I did record the magnitude 5,5 earthquake (poorly) and the magnitude 6,1 earthquake (clearly).

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The earthquake in Italy, this is the magnitude 6,1 earthquake. This image is under Creative Commons licence, please see CC Licence for more details.

I can record those earthquakes in Denmark since the distance is only ~1500 km. The minimum magnitude for my hardware to record earthquakes at this distance is around magnitude 5,4. Due to high background noise where I live.

Laptop and other hardware issues

Since I never got the laptop I was promised (It never showed up in the mail) I might not have any computer in December when I go to Iceland. I might resort to buying a new laptop with a loan from a store I know of. If I do that, I’ll go for a cheap laptop (that is also best, since I only use them when I travel). I also did not get a used hard drive that I promised and other hardware, the persons that told me that they wanted to donate that hardware to me just vanished and have not contacted me again over that. I have gotten hardware donations in the past and that is not a issue to get them if they are sent with the mail from within the EU.

Donations

Please remember to donate. I have to pay a high electric bill next month due to problem they had for the past six months. At least they gave me a discount (I think) since it was entirely their fault. Yet that is going to leave me rather broke in November. Thanks for the support. 🙂

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Low earthquake activity in Iceland at the moment

When this is written there is almost no earthquake activity in Iceland happening. There has been some minor earthquake swarm activity taking place in both south and north Iceland, but those earthquake swarms have been minor and not gone above 3,0 in magnitude. I don’t know how long this quiet is going to last, the longest quiet period I remember lasted for close to four months, then no or little earthquake activity happened in Iceland during that time.

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All quiet in Iceland at the moment. Copyright of this image belongs to Icelandic Met Office.

While it’s quiet in Iceland I’m going to add few more short stories to my short stories website. It can be read here.

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Fresh earthquake activity in Katla volcano for the past 48 hours

Today (17-October-2016) and yesterday (16-October-2016) small earthquake swarms have happened in Katla volcano. Most of the earthquakes that happened where small, with magnitude 1,0 or less. Three earthquakes had magnitude above 2,0.

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

In the news in Iceland today it was mentioned that this earthquake activity was due to heavy rain last week in south Iceland. I don’t agree with that assessment, since I recorded the strongest earthquakes and they show a clear sign of being volcano earthquake. I’m not able to record glacier quake activity at distance of 56 km (Heklubyggð geophone). The problem with volcano like Katla is the constant earthquake activity, over time there is a risk that geoscientists start to look at it as the normal pattern of the volcano and there is nothing to worry about. Current earthquake activity is of this nature and in my view its highly dangerous activity, while it has yet not resulted in a eruption there is nothing saying it is not going to do so soon. I remind people that is not possible to know when a eruption starts and it’s not known how an eruption in Katla volcano starts, besides what is know for historical recordings after the eruption has started (magma pushing towards the surface).

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Few earthquakes in Hofsjökull volcano

Today (15-October-2016) few earthquakes took place in Hofsjökull volcano. This where just few earthquakes with the largest earthquake having the magnitude of 1,4. Slight to the east a magnitude 2,3 earthquake happened, that however was a intra-plate earthquake and is not connected to any volcano.

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

This earthquake activity in Hofsjökull volcano appears to be a response to a stress change in the area, even if sits on its own rift zone (Skagafjörður rift zone, science paper). It is my guess that the source of this stress changes can be found in Bárðarbunga volcano and the movement of the eastern rift zone that is currently happening. I’m not expecting any eruption from Hofsjökull volcano, it’s not known when last eruption took place in Hofsjökull volcano. More earthquakes might happen in the future due to stress changes in the upper crust close to Hofsjökull volcano or in Hofsjökull volcano.

Update on 16-October-2016

The Icelandic Met Office has updated the earthquakes location. Now they are all in Hofsjökull volcano. Six earthquakes happened and the largest one had the magnitude of 2,3. No intra-plate earthquake happened, that was just a wrong manual location.

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Updated locations of the earthquakes in Hofsjökull volcano. Copyright of this image belongs to Icelandic Met Office.

Donations

Please remember to support my work. The failure with the hard drives did cost me and that is leaving me a little short at the moment. Thanks for the support. 🙂

Article updated on 16-October-2016 at 16:23 UTC. Updated earthquake map added.

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Minor earthquake swarm in Katla volcano

This morning (15-October-2016) a minor earthquake swarm took place in Katla volcano (east part of the caldera). This was a minor earthquake swarm, with the largest earthquake having a magnitude of 2,7.

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

All of the earthquakes that took place where small. With the second largest earthquake only having a magnitude 2,3. After the main earthquake swarm was over the activity quieted down and has remained quiet. The main earthquake activity ended at 08:58 UTC this morning. With only few earthquakes taking place after that.

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Earthquake swarm in Bárðarbunga volcano

Earthquake swarm with around 30 earthquakes took place during the night in Bárðarbunga volcano. The largest earthquakes had magnitude of 3,5. Yesterday (14-October-2016) a magnitude 3,3 earthquake took place in Bárðarbunga volcano.

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

Other earthquakes in this earthquake swarm where smaller in magnitude. This earthquake swarm is also interesting for the fact that it seems to change the stress levels around Bárðarbunga volcano started earthquakes in nearby volcanoes. I don’t know for sure what is happening, what has been confirmed by GPS measurements is that Bárðarbunga volcano is currently inflating and that is pushing the plug that collapsed down in the eruption 2014 – 2015 up again and that is creating current earthquake activity in Bárðarbunga volcano.

Article updated at 20:11 UTC. Word fixes.