Update on activity in Fagradalsfjall, Krýsuvík, Reykjanes volcanoes

The situation on Reykjanes peninsula is getting complicated due to activity between three volcanoes. This article is written at 15:22 UTC.

The volcanoes that are now showing activity on Reykjanes peninsula

Reykjanes volcano
Krýsuvík volcano
Fagradalsfjall volcano (added from 04-March-2021)

Fagradalsfjall volcano has no document eruption history over the last 10.000 years and the main volcano location is unknown if it exists.

Updates from the last few hours

  • Small rift valley has started to form between Keili mountain and Fagradalsfjall mountain. This is part of the rift zone that is Reykjanes peninsula.
  • Harmonic tremor stopped this morning and as Icelandic Met Office has been telling the news the origins of this harmonic tremor was earthquake activity that was so dense it created this harmonic activity. In the morning the activity dropped a little.
  • Magma continues to move in the Fagradalsfjall volcano system.
  • Earthquake activity is now between the volcanoes Reykjanes, Fagradalsfjalls and Krýsuvík. Why that is unclear but magma movement for now is only in Fagrdalsfjall volcano system.
  • Largest earthquake in last 24 hours had a magnitude of Mw4,5. Over the last 48 hours total of 72 earthquakes with magnitude over Mw3,0 have taken place. There is no sign of activity slowing down.

 

Dense earthquake activity in Reykjanes volcano, Fagradalsfjall volcano and Krýsuvík volcano. A lot of red dots showing new earthquakes and green stars showing earthquakes with magnitude above Mw3,0 on Reykjanes peninsula
Heavy earthquake activity on Reykjanes peninsula in several volcanoes. Copyright of this image belongs to Icelandic Met Office.

It is currently impossible to know for sure what happens next since this situation is extremely complicated because of all the volcanoes interactions and earthquake activity.

Live internet broadcasts of Keilir

Beint vefstreymi af skjálftasvæðinu – Efstaleiti (Rúv.is)
Keil­ir í beinni (mbl.is)
Keilir og skjálftasvæðið (YouTube)

If anything major happens I am going to post update soon as possible.

Article updated at 15:38 UTC.

Daily update for Reykjanes and Krýsuvík volcanoes 1-March-2021 at 16:27 UTC

This is a short update on activity in Reykjanes and Krýsuvík volcanoes.

There has not been a lot of change in the earthquake activity in Reykjanes volcano. There has been a slight increase in earthquake activity compared to yesterday (28-Febrary-2021) but that increase is not a lot and only from 800 earthquakes to 1000 earthquakes for a 12 hour time period according to the news. Largest earthquake in last 24 hours had a magnitude of Mw4,9 and was felt over a wide area in West Iceland and was clearly felt in Reykjanes area.

Dense pattern of earthquakes on the Reykjanes peninsula. Green stars and a lot of red dots.
The earthquake activity on Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.

There have now been two earthquakes outside Reykjanestá out in the ocean. A swarm of earthquakes started to appear at that location few hours ago. It is unclear what this earthquake activity means for now. This earthquake activity is something that needs to be watched since it seems to be connected for some unknown reason to the main earthquake activity on Reykjanes peninsula.

Update at 16:57 UTC

The newest earthquake has the magnitude of Mw5,1 at 16:35 UTC. This earthquake was felt over a wide area in western Iceland and all over Reykjanes peninsula.

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Article updated at 16:58 UTC.


Article updated at 23:35 UTC.

Daily update for 28-February-2021 at 21:18 UTC for earthquake swarm activity in Reykjanes and Krýsuvík volcanoes

I have now switched to daily update for the earthquake swarm in Reykjanes and Krýsuvík volcanoes.

The situation in the earthquake swarm on Reykjanes peninsula in the volcanoes Reykjanes and Krýsuvík remains the same. During the last 24 hours the largest earthquakes have had magnitude of Mw4,7 and a lot of earthquakes with magnitudes above M3,0. No magma movement has been detected so far but University of Iceland – Earth science department warned that detection of magma is only limited to the first 5 km of Earth crust and any magma movement below 5 km might not be detected by seismometer. It also issued that signs of magma might be getting lost in all this earthquake activity that is currently taking place and no clear sign of magma have been detected. The whole thing can be read on Facebook here. Text in English is provided by Eldfjallafræði og náttúruvárhópur Háskóla Íslands about this.

A lot of earthquakes close to south-west end of Reykjanes peninsula also a lot of red dots on the map showing fresh earthquake activity that has been taking place in the last hour.
Current earthquake activity on Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.

Some of the earthquake activity has migrated closer to the mountain Keilir. Other earthquake activity appears to be located at the same place as before. That location is close to Fagradalsfjall mountain and Krýsuvík volcano. If that changes anything when it comes to this earthquake activity I don’t know but the risk is there. Icelandic Met Office is now hoping that the earthquake swarm ends next week.

If anything major happens I’ll post new article soon as possible.

Update on Reykjanes and Krýsuvík volcanoes activity at 15:13 UTC on 27-February-2021

This is a short update on the activity on Reykjanes and Krýsuvík volcanoes.

Largest earthquake in the last 24 hour had a magnitude of Mw5,2 at 08:17 UTC and this earthquake was felt over a wide area in west Iceland. Over the last 48 hours there have been 95 earthquakes with magnitude above Mw3,0. GPS is showing a lot of displacement and those information can be found here. Largest displacement has been in and around Krýsuvík and other GPS stations on Reykjanes peninsula.

Green stars show the earthquake activity on Reykjanes peninsula. The green stars go from south-west and to north-east but there is also a lot of red dots showing new fresh earthquake activity.
Earthquake activity on Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.

Cracks have also formed in one road and other surface damage and other small damages have started to appear in buildings and roads on Reykjanes peninsula. There is going to be a storm in Iceland until early 2-March-2021. This storm is going to reduce the detection of smaller earthquakes in this earthquake swarm while it goes over Iceland.

All this information can change without warning.

News about cracks in the road on Reykjanes peninsula

Sprungur á Suðurstrandavegi vegna skjálftanna (Rúv.is, Icelandic, Pictures)

Reykjanes and Krýsuvík volcanoes update on 25-February-2021 at 19:28 UTC

This is a short update on activity in Reykjanes and Krýsuvík volcanoes. This update is written at 19:28 UTC.

The activity today (25-February-2021) has been mostly just minor earthquakes. Largest earthquakes today had a magnitude of Mw3,5 but this number can still change. In the last 24 hours over 2500 earthquakes have been recorded by Icelandic Met Office according to the news.

Green stars show all the earthquakes with magnitudes above Mw3,0 from yesterday (24-February-2021). A lot of red, yellow and orange dots showing smaller earthquakes
Earthquake activity on the Reykjanes peninsula over the last 48 hours. Copyright of this image belongs to Icelandic Met Office.

Steam has been confirmed close the parking lot close to Keilir mountain on Reykjanes peninsula. This area did not have steam before the Mw5,7 earthquake yesterday (24-February). It is unclear that is going on in that location. There continues to be high risk for a earthquake with magnitude Mw6,0 to Mw6,8 on Reykjanes peninsula because of this earthquake activity.

I’ll post update soon as possible if anything happens.

Reykjanes and Krýsuvík volcanoes update at 21:43 UTC

This is a short update at 21:19 UTC about the earthquake activity in volcanoes Reykjanes and Krýsuvík.

Earthquake activity slowed little since last update at 14:41 UTC. There are now fewer larger earthquakes taking place at the writing of this article. That has the chance of changing without warning. There seems to be new areas of activity appearing on the automatic Icelandic Met Office map. It is unclear if this is a artifact of the heavy earthquake activity in the area or a real thing is difficult to know for sure at the writing of this article.

Heavy earthquake activity on the Reykjanes peninsula from west to east. Over 50 green stars on the map tha show earthquakes with magnitude above Mw3,0
Earthquake activity on the Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.
Earthquake activity trace that shows how heavy the earthquake activity is. The trace is densly populated with dots each showing a earthquake. The letter 5,7 is on the trace showing the largest earthquake so far. Oldest dots from tdoay are orange in colour but fresh earthquakes are red in colour.
Earthquake activity on the Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.

Currently there are no signs of magma moving in both volcano systems. That might change without warning if there is a sudden change in activity. Because of how long it has been since last eruption took place in both volcanoes what happens before an eruption is unclear. What is only known from around 681 year old historical records that did survive to this day is that earthquake activity increases sharply before an eruption and does so a good while before the first eruption happens. Last eruption in Krýsuvík volcano was in the year 1340.

I am going to post next update tomorrow (25-February-2021) unless something major happens and then I’ll post a new article soon as possible.

Reykjanes and Krýsuvík volcano update at 14:41 UTC

This is a short update at 14:41 UTC.

This is about volcanoes Reykjanes and Krýsuvík.

According to new pictures from Icelandic Coast Guard. Steam has been seen from the area that had the strongest earthquakes this morning. This seems to be in a area that did not have an earlier any steam activity, this however depends a confirmation.

Earthquake activity with over 600 earthquakes on Reykjanes peninsula. Many green stars on the map
The earthquake activity on the Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.

Icelandic News about the steam activity that has been detected.

Hvít­ir gufustrók­ar sjást á svæðinu (mbl.is, Icelandic, Pictures)

Earthquake with magnitude Mw5,7 in Reykjanes volcano (update at 12:28 UTC)

This is a short update at 12:28 UTC on the earthquake swarm on Reykjanes peninsula and in Reykjanes volcano.

It is possible to see the earthquakes in my webicorder website here. This website is on limited bandwidth so it might load slowly if there is a lot of traffic to it. I am also self hosting it because of software requirement.

Largest earthquake in this swarm had a magnitude of Mw5,7 and was felt over most of Western Iceland. Minor damage has been reported in Reykjavík but it has been limited to stuff falling off shelves, walls and other such locations.

A lot of green starts showing earthquakes on Reykjanes peninsula
The earthquake swarm on Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.
Trace of earthquakes showing close to continues earthquake activity with magnitude of Mw4,0 and one earthquake with magnitude of Mw5,7
The trace of the earthquake activity in Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.

I am going to post updates as I know more about this earthquake activity. The reason why I am a bit late on this is that I was sleeping and I didn’t wake up with earthquake activity.

Update on ongoing earthquake swarm in Reykjanes volcano on 11-February-2021

The earthquake swarm that started more than one year ago in Reykjanes volcano continues to be ongoing. Largest earthquake on 11-February 2021 at 07:56 UTC had the magnitude of Mw3,0. Other earthquakes had smaller magnitude as has been ongoing since 20-January-2020.

Earthquake activity on Reykjanes peninsula and is mostly east of Grindavík town. Newest earthquakes are red dots and oldest are blue dots. Some earthquake activity west of Grindavík town.
Earthquake activity east of Grindavík town. Copyright of this image belongs to Icelandic Met Office.

Since this magma activity in Reykjanes volcano started around 20-January 2020 there has been ongoing earthquake activity in this area. I don’t expect this to stop. When a eruption is going to happen is not something that is possible to know. Currently GPS data does not show any interesting change and doesn’t suggest anything is about to happen.

Ongoing earthquake activity in Reykjanes volcano

On Friday 22-January-2021 an earthquake swarm took place just east of Grindavík town. This earthquake activity then stopped but resumed at midnight on Sunday 24-January-2021. All of the earthquakes where small in magnitude and only few did go above magnitude Mw1,0 in size.

Yellow dots east of Grindavík town on Reykjanes peninsula. Few blue dots showing earthquakes that are older then 1 day.
Earthquake activity in the Reykjanes volcano. Copyright of this image belongs to Icelandic Met Office.

The earthquake swarm that started on Sunday lasted for 12 hours according to Icelandic Met Office website. There is no change in GPS location data (can be viewed here) and there is no change in harmonic tremor. Currently there is a bad weather in Iceland preventing automatic detection of small earthquakes all over Iceland.

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