Today (6. January 2023) an earthquake swarm started in Reykjanes volcano close to Reykjanestá area. Largest earthquake had a magnitude of Mw3,0 at 00:31 UTC. Other earthquake have been smaller in magnitude.
Continue reading “Ongoing earthquake swarm in Reykjanes volcano (close to Reykjanestá)”
Earthquake swarm in Reykjanes volcano
Yesterday (26. December 2022) an earthquake swarm took place in Reykjanes volcano. Just on the Reykjanestá area. This earthquake swarm was mostly in the ocean and on the Reykjanes ridge but some earthquakes where on the Reykjanes peninsula on land.
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Earthquake swarm 3 km north of Grindavík town
Today (19. December 2022) and yesterday (18. December 2022) an earthquake swarm took place 3 km north of Grindavík town in the Reykjanes volcano. Largest earthquake had a magnitude of Mw2,9 and was felt in Grindavík. Earthquakes with magnitude Mw2,0 are felt in Grindavík, possibly even smaller earthquakes. At the writing of this article, this earthquake swarm is ongoing but weather is blocking almost all of the automatic earthquake detection.
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Earthquake swarm in Reykjanes volcano (3-December-2022)
Today (03-December-2022) at 12:49 UTC an earthquake with magnitude of Mw3,5 at 7,0 km depth. This was the largest earthquake in the swarm. Around of 40 earthquakes took place at the writing of this article. There are no reports about the largest earthquake was felt in nearby populated areas.
This earthquake activity suggest that a new inflation period is about to start in this part of the Reykjanes peninsula and Reykjanes ridge. There has been rather quiet time in Fagradalsfjall volcano and Reykjanes volcano since August when last eruption took place in Fagradalsfjall volcano. Reykjanes volcano has not erupted so far, but has continued activity of magma injection into the crust. When that is going to result in a eruption is impossible to know.
Earthquake activity has started to increase in Fagradalsfjall and Reykjanes volcanoes
Since yesterday (06-October-2022) the earthquake activity has been increasing in the volcanoes Fagradalsfjall and Reykjanes volcanoes. Please note that Global Volcanism Program has updated the informations regarding Fagradalsfjall mountain and now classifies it as its own volcano, this is after a new report and information from Icelandic Met Office. From now on I am going to use that classification when updating on activity in Fagradalsfjall volcano. I’ll not update older articles (too much work), but this also applies to them as such.
This also means that Fagradalsfjall is a new volcano in Iceland.
Earthquake activity at start of an eruption cycle in Fagraldsfjall volcano are not large. They grow larger once magma has started to push into the crust, until then the earthquake activity only seems to happens with minor earthquake swarms.
Article updated with new information.
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Earthquake swarm in Reykjanes volcano
This morning (12-July-2022) an earthquake swarm took place in Reykjanes volcano. This earthquake swarm has at the writing of this article around 30 earthquakes. Two largest earthquakes had a magnitude of Mw3,3 and Mw3,4. The second earthquake was felt in towns on Reykjanes peninsula.
It has been rather quiet on the Reykjanes peninsula in last few months. There is always minor earthquake activity happening because of inflation of magma in this area. There has been lack of large earthquakes in recent months. I don’t know why that is. GPS data show that there has not been any notable inflation or deflation in Reykjanes volcano for the last few weeks. That translates into lack of earthquakes. If this earthquake swarm means that is changing is something to watch out for. Small earthquake swarm can mean change, what it means here is unclear. It is known that not every eruption starts with a big earthquake swarm in a volcano.
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Ongoing earthquake swarm north of Grindavík town wakes up people
Today (22-May-2022) at 09:53 and 09:57 UTC earthquakes with magnitude of Mw3,5 and Mw3,6 took place north-west of Grindavík town. This earthquake was felt and did wake up people according to the news.
There is no signs that this earthquake activity is slowing down. It does come in waves according to Icelandic Met Office. This means that there are period of high activity with low activity between. Currently, at the writing of this article, there is a low activity period ongoing.
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Increased earthquake activity off the coast of Reykjanestá
Today (20-May-2022) around 18:00 UTC the earthquake activity off the coast of Reykjanestá, that is part of Reykjanes volcano, increased again after few days of little earthquake activity. The earthquake swarm is ongoing and always changing so this article is going to be short because of that.
Largest earthquake so far had a magnitude of Mw3,8 and the second largest earthquake had a magnitude of Mw3,5. The Mw3,8 earthquake was felt in Grindavík and on nearby towns on Reykjanes peninsula. A Mw3,0 earthquake took place just north of Grindavík and was felt in the town.
Large earthquake swarm in Reykjanes volcano
Yesterday (20-November-2021) an large earthquake swarm started in Reykjanes volcano. This earthquake swarm is rather large, with 217 earthquakes recorded so far. Largest earthquake had a magnitude of Mw3,5 but other earthquakes have been smaller in magnitude.
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Earthquake swarm in Reykjanes volcano
Yesterday (12-October-2021) an earthquake swarm took place in Reykjanes volcano. Largest earthquake in this swarm had a magnitude of Mw3,3 and the earthquake swarm was out in the ocean not far from the coastline.
It is impossible to know for sure if this earthquake activity is directly connected to magma movements in this area. It is possible, but there have been some sign of magma moving in the crust in this area. The magma is moving but is not erupting or starting an eruption. Earthquake activity seems to be growing in this area of Reykjanes peninsula and Reykjanes ridge after the eruption in Fagradalsfjall mountain stopped.