Yesterday (13-November-2021) at 23:23 UTC an earthquake with magnitude of Mw3,4 took place in Vatnafjöll mountain south of Hekla volcano. This looks like an aftershock of the main earthquake of magnitude Mw5,2 that took place on 11-November-2021.
Continue reading “Strong aftershock in Vatnafjöll mountains (south of Hekla volcano)”
Two strong earthquakes in Bárðarbunga volcano
Today (12-November-2021) at 15:16 and 15:35 two earthquakes with magnitudes of Mw3,3 and Mw3,6 took place in Bárðarbunga volcano.
Continue reading “Two strong earthquakes in Bárðarbunga volcano”
Ongoing earthquake swarm close to Keilir mountain
The earthquake swarm with Keilir mountain continues today (2-October-2021) and largest earthquake at the writing of this article had a magnitude of Mw4,2. This might change without warning.
![Green stars on Reykjanes peninsula close to the mountain Keilir. Shows where the current activity is.](https://icelandgeology.net/wp-content/uploads/2021/10/211002_2330.png)
Based on what I am seeing it is my view that magma is the reason why this earthquake activity is happening. The magma seems trapped, based on the earthquake activity and that is interesting. This suggest that the feeder channel, that possibly started at this location has closed up and that is the reason why the eruption in Fagradalsfjall mountain stopped. At least that is the working idea, if it is true I don’t know.
Department of Civil Protection and Emergency Management and Icelandic Met Office has warned people against going to Keilir mountain because of risk of volcano eruption or large earthquakes.
It is unclear at the writing of this article if there are changes to hydrothermal activity close to Keilir mountain. There have been reports about it, but they remain unconfirmed at the writing of this article.
There is now a risk of an earthquake with magnitude of Mw6,0 in the area of Keilir mountain. The earthquake activity shows a pattern of high and low activity every few hours. Why this happens is not well understood at the writing of this article.
Earthquake activity in Katla volcano
Today (14-August-2021) an earthquake with magnitude Mw3,1 took place in Katla volcano. Other earthquakes where smaller in magnitude.
This earthquake activity appears to be normal late summer activity in Katla volcano. There was a minor increase in conductivity in nearby glacier rivers in last few days, that suggests that cauldrons have been emptying their water this summer. This is normal and happens almost every summer due to glacier melt.
Earthquake activity on the Reykjanes ridge
Yesterday (11-August-2021) there was a earthquake swarm on Reykjanes ridge. This earthquake swarm was not felt because of distance from the coastline.
Largest earthquake in this swarm had a magnitude of mb4,4 according to EMSC. Information about this earthquake can be found here. The distance from the SIL network made it difficult to know when this earthquake swarm started and stopped.
It is unclear if this part of the activity period that Reykjanes peninsula and Reykjanes ridge is now entering and is going to last for few centuries.
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Earthquake activity in Reykjanes volcano
During the night and today on 5-Augustu-2021 an earthquake swarm took place in the Reykjanes volcano.
Largest earthquake in this swarm had a magnitude of Mw3,0 and other earthquakes at the writing of this article have been smaller. That can change without warning. Currently there is a possibly that this earthquake swarm is over.
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Earthquake swarm in Tjörnes Fracture Zone
During the night of 5-August-2021 an earthquake swarm took place in Tjörnes Fracture Zone (TFZ). At the writing of this article this earthquake swarm is ongoing.
Largest earthquake in this swarm had a magnitude of Mw3,0. Other earthquakes where smaller in magnitude. No earthquake has been felt in Grímsey island.
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