Earthquake swarm in Krýsuvík-Trölladyngja volcano

Today (6. May 2024) at 17:43 UTC an earthquake with magnitude of Mw3,3 took place in Krýsuvík-Trölladyngja volcano. This earthquake was felt in Reykjavík area.

Green star west of Kleifarvatn lake on Reykjanes peninsula in Krýsuvík-Trölladyngja volcano. Earthquakes in other volcanoes are also visible on this map.
Earthquake activity in Krýsuvík-Trölladyngja volcano. Copyright of this image belongs to Icelandic Met Office.

At the writing of this article. This earthquake swarm is ongoing. It however has not constant and only has few earthquakes every once in a while at the writing of this article. This earthquake activity might increase, because it might be connected to stress changes in the crust because of inflation in Svartsengi volcano.

Earthquake swarm in Eldey volcano (out on the Reykjanes ridge)

Today (5-May 2024) at 20:33 UTC an earthquake with magnitude of Mw3,5 took place close to Eldey on the Reykjanes ridge. This is out in the ocean and considerable distance from land, so more earthquakes are happening then are being registered by Icelandic Met Office.

Green star and red dots out in the ocean, on the Reykjanes ridge. This is the current earthquake swarm on Reykjanes ridge.
Earthquake swarm in the Eldey volcano. Copyright of this image belongs to Icelandic Met Office.

This earthquake swarm is ongoing at the writing of this article. There are earthquakes that are only going to appear on Icelandic Met Office website after manual review in this earthquake swarm.

Earthquake activity in Reykjanes volcano

Today (22. April 2024) at 04:53 UTC an earthquake swarm started in Reykjanes volcano. This was not a strong or a large earthquake swarm. Largest earthquake only having a magnitude of Mw3,1. All other earthquakes where smaller in magnitude.

Green star just off the south coast of Reykjanes peninsula to the west part of it. There are also smaller dots that show smaller earthquakes in the same area.
Earthquake activity on the Reykjanes ridge and in Reykjanes volcano. Copyright of this image belongs to Icelandic Met Office.

This earthquake activity suggest a magma movement. It is however too little to start an eruption at the writing of this article. That can change without warning. Since the condition that the Reykjanes volcano is in is unclear, since its in part under the ocean and that makes monitoring it properly difficult and impossible in some areas.

Moderate earthquake in Bárðarbunga volcano this morning (21. April 2024)

This morning on 21. April 2024 at 06:37 UTC an earthquake with magnitude of Mw5,4 took place in Bárðarbunga volcano. Largest aftershock had a magnitude of Mw3,0. There’s no earthquake swarm going on at the time of writing of this article. This earthquake was felt in some parts of Iceland but was possibly detected over most of Iceland in a quiet locations.

Green star showing the location of the large earthquake. Its located in the eastern part of Bárðarbunga volcano caldera.
Earthquake activity in Bárðarbunga volcano. Copyright of this image belongs to Icelandic Met Office.

This is the strongest earthquake in Bárðarbunga volcano since the eruption in Holuhraun in the year 2014 to 2015. This earthquake activity is a long term signal that inflation in Bárðarbunga volcano has reached a new level. Eruption is not going to happen or is extremely unlikely to happen following this earthquake or in next few years. Shortest time between eruptions in Bárðarbunga volcano is around 10 years.

This is how I recorded the earthquake on my own seismometer.

The wave form from the earthquake. A sharp dark spike on the recording of the seismometer. At the end there are strong separated waves that show the surface waves.
The magnitude Mw5,4 earthquake as it was recorded on my own seismometer.

Earthquake swarm in Krýsuvík volcano (13. April 2024)

I am sorry how late I am with this article. I was busy yesterday (13. April 2024) and I was unable to write this article at that time.

Yesterday (13. April 2024) at 10:02 UTC an earthquake with a magnitude of Mw3,3 took place just south of Kleifarvatn lake in Krýsuvík volcano. This earthquake swarm seems to have happened on a fault that is mostly known for earthquakes that are connected to tectonic movements in the area. This is not a fault that is connected to volcano related activity, as those are more in south-west and north-east direction. Faults that are connected to crust movement in this area have the direction north-south as seems to be the case this time. It complicates matter that magma movement deep in the crust can result in earthquakes happening on both type of faults. As I suspect what happened here.

Green star and a lot of smaller yellow to blue dots showing smaller earthquakes that happened in Krýsuvík volcano yesterday (13. April 2024).
Earthquake activity in Krýsuvík volcano. Copyright of this image belongs to Icelandic Met Office.

Krýsuvík volcano is not ready to start an eruption, best I can see. It is also missing a lot more earthquake activity before an eruption starts. But the signs that it is moving in that direction have started to appear. How long the wait is going to be when a eruption starts is impossible to know.

Earthquake swarm in Askja volcano

Today (25. March 2024) starting at 08:06 UTC and ending around 11:00 UTC an earthquake swarm started in Askja volcano. The largest earthquake in this swarm had a magnitude of Mw3,5. The area is remote and this earthquake was not felt.

At the bottom of this image. There's a green star and few yellow dots. This is the earthquake activity in Askja volcano.
Green star in Askja volcano. Copyright of this image belongs to Icelandic Met Office.

This earthquake activity suggests that this was a dyke intrusion. Eruption is unlikely at the moment in Askja volcano. This activity might be the first indicators that Askja volcano has started to prepare for an eruption in the future. When is impossible to know.

Earthquake with magnitude 4,7 in Bárðarbunga volcano

Today (18. March 2024) at 00:45 UTC an earthquake with magnitude of Mw4,7 (EMSC Information) took place in Bárðarbunga volcano. Icelandic Met Office had this magnitude at Mw4,4.

Green star showing the largest earthquake in Bárðarbunga volcano. Dots show smaller earthquakes happening in Bárðarbunga volcano.
Earthquake in Bárðarbunga volcano. Copyright of this image belongs to Icelandic Met Office.

This earthquake is part of the inflation that is happening in Bárðarbunga volcano. This is going to continue to happen every few months for the next few years to decades until the magma chamber in Bárðarbunga volcano in it is fully inflated.

Dyke intrusion into Sundhnúkagígar from Svartsengi volcano yesterday (02. March 2024)

Yesterday (02. March 2024) at 15:57 UTC an earthquake swarm started in Sundhnúkagígar, all earthquakes where small in magnitude and around 150 where recorded. This earthquake swarm was as sign of a dyke intrusion that was starting into Sundhnúkagígar. It did not result in a eruption, but might be a sign of where next eruption is going to happen, when it happens. The dyke intrusion ended around 17:57 UTC.

This is a bit early, but it seems that this dyke intrusion moved or changed the rift valley it happened in. This rift valley was created in the dyke intrusion on 10. November 2023 (Icelandic Met Office has a image of it here). It might also have moved the rift valley that was created on 14. January 2024 (image of that rift valley can be found here, its marked with a blue colour). This rift valley situation is making the geology in this area extremely complex and volatile. Since the crust, the top layer is extremely fractured in areas of the rift valley and that makes it easy for the magma to find a path to the surface.

It is impossible to know when next eruption is going to happen. But it is my own estimated that next eruption might happen between 3. March to 5. March. I might be wrong on this, that’s always an possibility.

Earthquake swarm in Krýsuvík volcano

Today (26. February 2024) at 18:27 UTC an earthquake with magnitude of Mw3,4 took place in Krýsuvík volcano. This earthquake was felt, but I don’t know over how wide area.

Green star in Krýsuvík volcano, just south of Kleifarvatn lake. Along with few red dots showing smaller earthquakes.
Earthquake activity in Krýsuvík volcano, shown as green star. Copyright of of this image belongs to Icelandic Met Office.

This earthquake activity might be connected to the inflation that is happening in Svartsengi volcano, as it changes the stress values in the crust over a large area. More earthquake activity is possible in this area.