Today (11-September-2019) at 09:42 UTC a magnitude 3,0 earthquake took place in Hengill volcano. The largest earthquake was felt in Hveragerði village. They also felt a minor magnitude Mw1,7 that happened at 05:22 UTC. The reason why that earthquake was felt is because it took place inside the town under some person house (or close to someone house).
The earthquake swarm in Hengill volcano today (11-September-2019). Copyright of this image belongs to Icelandic Met Office.
Earthquake activity is a regular feature in this area.
Today (8-September-2019) at 02:00 UTC earthquake swarm started in Bárðarbunga volcano. From 02:00 to 02:03 UTC total of five earthquake took place in Bárðarbunga volcano. Largest of them had a magnitude of Mw4,2 and second largest had a magnitude of Mw3,2. Other earthquakes that took place had a smaller magnitude.
The earthquake activity in Bárðarbunga volcano. Copyright of this image belongs to Icelandic Met Office.
Earthquake activity like this in Bárðarbunga volcano is common. This type of earthquake activity happens once every month after the end of the eruption in Holuhraun (2015).
At 01:27 UTC on 24-August-2019 an magnitude 3,4 earthquake took place in Krýsuvík volcano. This earthquake was felt in Hafnafjörður, Garðabæ and Kópavogi. This earthquake started a minor earthquake swarm in Krýsuvík volcano.
Earthquake swarm in Krýsuvík volcano. Copyright of this image belongs to Icelandic Met Office.
This earthquake swarm seems to be over when this article is written. Earthquake swarms like this are regular at this location.
A minor earthquake swarm took place in Bárðarbunga volcano today (21-august-2019). Largest earthquake had a magnitude of 3,5 and other earthquakes that happened are smaller in magnitude.
The earthquake in Bárðarbunga volcano (green star). Copyright of this image belongs to Icelandic Met Office.
This earthquake was in the north-east part of the caldera. In last few months earthquake activity has been increasing in that part of the caldera. Earthquake activity in Bárðarbunga volcano is due to magma inflating the volcano.
Over the last few days there has been increase in earthquake activity in Hamarinn volcano (Bárðarbunga volcano). In Global Volcanism Program record this area is known as Loki-Fögrufjöll. Largest earthquakes today (12-August-2019) had a magnitude of 2,8 and 2,5 and other earthquakes have been smaller in magnitude.
The earthquake activity in Hamarinn volcano (red/blue dots at the edge of the glacier). Copyright of this image belongs to Icelandic Met Office.
Last time Hamarinn volcano had this type of earthquake activity it erupted for few months after it had started. That was on 12th July 2011. I wrote about those events here and here (glacier flood that followed, July 13th 2011). There were minor additional eruptions in August and November in 2011 according to the tremor data, those eruptions only lasted for ~4 hours at most. Since then this area has mostly been quiet and did drop down in activity after the eruption in Bárðarbunga volcano in 2014 to 2015.
It is unclear what is going on in Hamarinn volcano, for now there is no eruption taking place and any eruption is going to appear clearly on harmonic tremor data on the SIL network. It seems that eruptions in Hamarinn volcano start without any earthquake activity, I don’t know why that is. Last major eruption in Hamarinn volcano took place in the year 1910 from June 18 to October.
It was announced today (8-August-2019) that gas has started to appear from Öræfajökull volcano. It is not clear from the news when this gas was discovered but it might have been just few days ago. Icelandic Met Office has already made attempts to collect the gas for analyse, last attempt failed due to how little gas is coming from the ground. That might change as this situation changes. What type of gas is leaking out is not known but there is a good chance that this is mostly CO2, SO2. It has been quiet in Öræfajökull volcano in recent weeks. It is a question if this lack of activity is what happens with some volcanoes just before an eruption as is indicated by a study that was done few years ago (information about the study can be found here).
What this means is unclear. Earthquake activity remains at minimum in Öræfajökull volcano. There is a chance this gas is a signal for more earthquake activity even if an eruption doesn’t happen. It is unclear what happens before an eruption in Öræfajökull volcano since last eruption took place in 1727 3rd of August to 1728 1st May.
Earthquake activity in Öræfajökull volcano today. Quiet volcano at the writing of this article. Copyright of this image belongs to Icelandic Met Office.
Loftbólur á yfirborði Kvíárlóns (Rúv.is, Icelandic, picture, map)
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Today (20-Juli-2019) at 14:15 UTC an earthquake with the magnitude of 3,3 took place in Torfajökull volcano. This earthquake took place in south part of the caldera of Torfajökull volcano. This earthquake might have been felt by tourists in the area.
The earthquake activity in Torfajökull volcano. Copyright of this image belongs to Icelandic Met Office.
There has not been a lot of aftershocks following this earthquake for now. Last earthquake with magnitude above 3,0 took place on 12th of July and this means there might be a serious increase in earthquake activity in Torfajökull volcano. There are no obvious signs that Torfajökull volcano is about to erupt but it is also not known what is needed to make an eruption happen in Torfajökull volcano. Best action for now is to continue to monitor the activity in Torfajökull volcano.
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Since yesterday (13-July-2019) there has been a increase in earthquake activity in Katla volcano. There are no signs of anything more happening than just this increase of earthquakes.
Earthquake activity in Katla volcano. Copyright of this image belongs to Icelandic Met Office.
This increase in activity is something to keep a watch for but this has happened before without resulting in a eruption in Katla volcano. There have been reports on high volume of water level in the cauldrons in Mýrdalsjökull glacier. I don’t know if that is connected to this increase in earthquake activity. There is an expatiation that water is going to break out soon and the flood is going to be the largest since 2011. That might increase earthquake activity in Katla volcano once that happens. For now however nothing has been reported in the news of such a event.
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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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According to latest news from Rúv on recent survey on Bárðarbunga volcano the cauldrons that appeared during the Holuhraun eruption (2014 – 2015) continue to grow in size and there has been increase in hydrothermal output in those cauldrons. Distance between the cauldrons is 800 meters and their depth is more than 100 meters. In one of the cauldrons a hot spring has been observed and strong sulphur comes from it. The water in the cauldrons no longer freezes due to heat. Rock has also been exposed that have never been seen before and have been under the glacier for thousands of years.
Video of the cauldrons can be seen here on Rúv News report. Everything is in Icelandic.
Sigkatlarnir í Bárðarbungu stækkað nokkuð (Rúv.is)