This is a short update.
Reports from yesterday (22-October-2020) on Stöð 2 (Channel 2) report that there is a strong smell of Sulfur dioxide from Grænavatn lake. Some increase in one hots spring in Krýsuvík volcano has been reported. That might because of change in water pathways in the crust because of the earthquake on 20-October-2020. New cracks have also formed and the earthquake caused small landslides on the coastline closest to the earthquake. The cracks in the ground are dangerous and people should not go to the coastline in this area of Iceland now. A new earthquake can happen at any time without warning.
Automatic GPS data is suggesting that in Krýsuvík volcano there has been a fast inflation of magma. I don’t think this is displacement because of the earthquake based on other nearby GPS stations.
Brún Krýsuvíkurbjargs sprungin og varasöm eftir jarðskjálftana (Stöð 2/Vísir.is, pictures, video)
Since yesterday (20-October-2020) the earthquake activity on the Reykjanes peninsula in the volcano Reykjanes or Krýsuvík volcano has been slowly getting down after the Mw5,6 earthquake. There have been at the writing of this article 30 earthquakes with magnitude that are larger than Mw3,0 in this area, some of those earthquakes have been felt in nearby populated areas.
The earthquake activity slightly more than 1 day later on the Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.
At the writing of this article the number of detected earthquakes in this swarm is getting close to 2000 earthquakes. The risk of stronger earthquake both west and east of the Mw5,6 earthquake that took place yesterday. Strongest possible earthquake in this part of Iceland can reach magnitude Mw6,5 to Mw6,7 depending on location and that is only east of current earthquake activity in Brennisteinsfjöll volcano area.
According to the news, the first injury because of the Mw5,6 earthquake has been reported along with damage to a viewing place in the mountain close the location of the earthquake yesterday.
Rotaðist þegar jörðin kipptist undan (mbl.is, pictures, Icelandic)
I am going to post updates soon as possible if anything more happens in this activity on Reykjanes peninsula. At the writing of this article there has not been any sign of magma movement or any sign that an eruption has taken place in this area.
It was reported by Icelandic Met Office at 22:20 UTC that people had been noticing more gas smell close to a small lake called Grænavatn. This suggest that magma might be on the move in the crust. It is currently difficult to be sure at writing of this article. This would be inside the volcano of Reykjanes.
Grænavatn lake. Copyright of this image belongs to Google Earth / Google.
Earthquake activity on the Reykjanes peninsula at midnight 21-October-2020. Copyright of this image belongs to Icelandic Met Office.
At the writing of this article there has not been any change in harmonic tremor on nearby SIL stations. If magma is about to move that is possibly going to happen without much warning but this difficult to know for sure at the writing of this article.
This is the last update for today (20-October-2020) on this earthquake unless something major happens.
This earthquake magnitude has been confirmed at Mw5,6 mostly. It might change in next few weeks as the data is better reviewed. More then 400 earthquakes have been felt after the large earthquake and at the writing of this article largest aftershock has automatic magnitude of Mw4,1.
Location of the largest earthquake. Copyright of this image belongs to Icelandic Met Office.
Currently the main earthquake activity is moving west or south-west and that might trigger more large earthquakes in next 24 – 48 hours. Minor damage has been reported following the largest earthquake. Items falling off shelves and in stores and homes, cracks forming in walls, floors and outside in few areas. Rock slides have also been reported and closed one road on Reykjanes peninsula close to Grindavík.
News reports with pictures and videos if the main earthquakes and the damage it created
Stór sprunga í gólfi flugskóla Keilis (mbl.is, picture)
Skjálftinn í myndum (frettabladid.is, pictures, videos)
Added: Vörur köstuðust til og maður í górillubúningi hljóp um (Rúv.is, Video, Icelandic)
Earthquake activity on Reykjanes peninsula
The earthquake activity at 18:45 UTC on Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.
There have not been any clear sign or any sign of magma movement in this earthquake activity at the writing of this article. It is unclear of that is going to change since the magma that has been flowing into the crust in Reykjanes volcano simply might not be pressured enough to erupt for a while longer.
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Article updated at 20:06 UTC.
This is a short update on the earthquake activity on Reykjanes peninsula. Early magnitude calculation give this earthquake a magnitude of Mw5,6 but this number might change. Large aftershock activity is expected during the next 24 hours.
The earthquake activity on Reykjanes peninsula. Copyright of this image belongs to Icelandic Met Office.
A video recording of the earthquake from Alþingi shows the effect of this earthquake.
I’ll post more details later today when I have them.
Today (20-October-2020) at 13:43 UTC large earthquake with early magnitude of Mw5,5 took place close to Kleifarvatn lake in Krýsuvík volcano. I’ll write a second article with more details about this earthquake later today. This earthquake was felt in Reykjavík and over wide area of south Iceland.
Yesterday (17-October-2020) at 22:02 UTC an earthquake with magnitude of Mw3,3 took place 3 km north-east of Húsavík town in the Flatey – Húsavík fault. This was followed by few minor earthquakes. This earthquake was felt in Húsavík but no damage was reported from it.
The earthquake activity close to Húsavík. Copyright of this image belongs to Icelandic Met Office.
This area of the Flatey – Húsavík fault has not seen any earthquake activity until now, even if there has been a strong earthquake swarm going on in nearby areas since June 2020 . There continues to be a risk of stronger earthquakes in Tjörnes Fracture Zone.
Since 15-October-2020 there has been a slow increase in small earthquakes in Reykjanes and Krýsuvík volcanoes. This earthquake activity has been followed by changes in GPS location. The GPS data can be viewed at Reykjanes CGPS website. All the earthquakes at the writing of this article are small in magnitude. Last few weeks have been quiet in Reykjanes and Krýsuvík volcanoes and that is normal for this type of volcanoes.
The earthquake activity in the volcanoes Reykjanes and Krýsuvík. Copyright of this image belongs to Icelandic Met Office.
It is not possible to know how this is going to develop since what happens depends on the amount of magma moving and what that does. It is unclear if this is inflation or deflation event taking place. It might take few days to see what that is.
I always hate to write this type of article. But it can’t be helped in my situation. Currently I am broke due to extra cost of buying new hard drives for my main computer so it remained useful and I still have some more hardware to renew and buy in next few months. While I have installed Google Adsense its going to be a while until it starts working for me properly. Since until I am back in Denmark I’ll run it in low mode and I might have to disable it for few weeks so I won’t go over few limits that Google Adsense has until I have moved back to Denmark (complicated reasons I’ll not write about currently).
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I have to keep PayPal as it is the only way to let people donate to support my work. I’ll switch to Danish PayPal once I have moved back to Denmark. I don’t know if I am going to have have the monthly donation possibly since that option did only have little usage.
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Article updated on 13-October-2020 at 02:46 UTC.
Article updated on 14-October-2020 at 03:53 UTC.
I don’t know when it happened and I am sure that due to factors over the years the number isn’t exactly correct. But according to my website counter Iceland geology has now reached 10 million page views. Thanks to all the people that read my work here.