Over the last few weeks there has not been a lot to report about the eruption in Fagradalsfjall mountain. That changed tonight. The eruption seems to have entered a new stable phase. With constant eruption, rather than erupting every few hours and nothing happening for several hours after that. I don’t know if that is going to continue for long, but that is the situation at the writing of this article.
Most of the lava flow is going into Meradalir at the writing of this article. Some of the lava flow is happening underground and that lava flow is going into south-Meradalir that is just above Nátthagi valley. That can be seen as gas is now coming from that lava field and increase in gas emission shows that fresh lava is flowing under the crust of the lava. Surface lava paths can change without warning at any time.
Tourist continue to place them self in great danger by walking out in the lava field. If there is an accident there won’t be any recurse because it is going to be already too late anyway.
Update on 7-August-2021 at 13:48 UTC
Today (7-August-2021) at 08:00 UTC the eruption stopped. The harmonic tremor dropped quickly as the stop in the eruption was quick after going on for two and half day. Why this happens remains unclear. At the writing of this update at 13:49 UTC the eruption remains inactive.
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This is a short update on the eruption in Fagradalsfjall mountain. It is still classified as Krýsuvík-Trölladyngja volcano eruption. That might change in the future.
There is no sign of the eruption is about to stop.
Most of the week the lava was flowing in lava tubes that where invisible from the surface. Today (Friday 18-June-2021) that changed and lava is now again overflowing over the crater.
The crater remains unstable and collapses from the inside walls are frequents, or used to be. It is possible that for now the amount of lava in the crater is holding the walls up.
Nátthagi is now flooded with lava and the lava is on its way out of Nátthagi in next few hours to days. There won’t be any attempt made to stop the lava reaching the road or the ocean.
Geldingadalir valley is now full of lava and has overflowed a little. Lava might flow into Nátthagakriki in next few days, but small dirt walls where pushed up to try and delay that from happening. It is unclear if that worked. But for now the lava has not flowed into that direction.
Currently there are no other news about this eruption. Next update should be on 25-June.
There has not been a lot of change in the eruption during this week (28-May to 5-June) in the eruption of Fagradalsfjall mountain that might be part of Krýsuvík-Trölladyngja volcano system.
The crater continues to get bigger. The crater grows by collapsing on the inside and expanding it walls following that it seems. Current height of the crater is 300 to 500 meters. This is a bad estimate based on web camera views.
The main viewing area is now cut off from walking people because lava has flowed over the lowest point on the walking path.
There is now a risk because of the overflow over the walking path that the western barrier is going to be breached soon.
In general the lava doesn’t travel far but it builds up close to the erupting crater and is now at locations hundreds of meters thick.
If the eruption continues as it has been doing the whole area is going to go under lava in next 6 to 10 months. As the lava just keeps building up.
There are no signs that this eruption is ending.
There are no other news about this eruption that I know of. It continues as it has been doing since 19-March-2021. In other parts of Iceland it has also been quiet or minimal activity not worthy of reporting.
This article is a little late because I was dealing with headache issue for the last 12 hours.
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This is a short update on the eruption in Fagradalsfjall mountain that is currently erupting and is part of Krýsuvík-Trölladyngja volcano system.
There have not been any major changes since last update. Minor changes seems to be happening but at the writing of this article, those changes have remained small.
Large lava fountain activity has stopped in later part of this week. There is still some lava fountain activity going on but it is minor based on what I’ve seen on the web cameras.
Lava is now flowing into Nátthagi. It is expected to reach Suðurstandarvegur road in 20 to 60 days depending on the lava flow into Nátthagi.
The western barrier for the lava has stopped the lava flow into Nátthagi at the writing of this article. Bad weather today (28-May-2021) has prevented any observation of the current situation in the eruption area. Its fog and heavy rain in this location currently.
Lava reservoir have formed in the lava field. They fill up slowly and then empty them self quickly into the lava field both on surface and with lava tubes that have formed in the lava field. This allows the lava field to expand quickly and without warning into new areas.
The lava field is slowly building upwards from the height it has been in recent weeks. Results of this is that soon the walking path to the viewing area on the ridge might soon be blocked by lava going over the area at its lowest points. This might only take few weeks to happen but that depends on how quickly the lava field builds up.
Other then this there has not been a lot of change in the eruption. This phase of the eruption might go on for months. There are clues that this is the first step in the building of a shield volcano or maybe a stratovolcano. What happens is a wait and see on this eruption.
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This is a short update on the eruption in Fagradalsfjall mountain on 21-May-2021. This is part of the Krýsuvík-Trölladyngja volcano system.
There has not been a lot of change since last update on the eruption. The eruption has now been going on for two months and few more days. There are no signs of the eruption ending.
The lava fountain activity continues as it has been doing for the last month.
Output of lava has been increasing and is now around 11m3 compared to 5m3 at the start of the eruption.
Lava is now on its way to the ocean by flowing down into Nátthagadalur valley. There is an attempt to try and stop or delay that from happening by pushing up defences and try to hold back the lava field. It is my personal view that this attempt is going to fail, at most it is only going to delay the lava a little bit. Since the lava field also has to get over a hill that is in its path anyway. That is only going to take few days to a week depending on how much lava is being fed into this part of the lava field. That changes all the time with no warning.
Most of the lava goes into Meradalir valley where it is for now not putting anything in danger or risking infrastructure.
SO2 pollution is starting to show in south Iceland. There was also report of static electric charge build up around the eruption site yesterday (20-May-2021). It didn’t result in a lightning but the risk was in place for a good while.
There are for now no other news of the eruption and it has been quiet in other parts of the Iceland during the last week.
During the night of 27-April-2021 an earthquake swarm took place south of Keilir mountain in Krýsuvík-Trölladyngja volcano system. This earthquake activity at this location has been going on for a long time and is interesting. There are no sign that suggest an eruption is about to happen at this location, that is the situation at the writing of this article. Largest earthquake in this swarm had a magnitude of Mw3,2 at the depth of 6,1 km and second largest earthquake had a magnitude of Mw2,8 at the depth of 5,9 km.
It seems that there is a chance there might be changes about to happen in the eruption in Fagradalsfjall mountain. I am going to write about that tomorrow at the earliest, but the article might be delayed of there is a lot going on while I gather information about what is happening.
This is a short update on the eruption in Fagradalsfjall mountain in Krýsuvík-Trölladyngja volcano system.
There are no major changes reported during the last few days. But there have been minor changes in last few days. Here the latest changes that have been reported.
The oldest craters have stopped erupting. One of the crater has changed into a lava lake for now while the other is possible also a lava lake even if it is not visible. A lot of gas (smoke) comes from the more south crater in the crater row 1.
There are three to four craters that continue to erupt. There seems to have been a tiny increase in the eruption today (26-April-2021). This can be explained by how few craters are currently erupting.
No new craters have opened up in last few days. This is correct at the writing of this article.
Harmonic tremor seems to be decreasing. It is unclear why that is since the eruption is currently ongoing.
There are no other reports about the eruption. I am not sure when next update is going to happen but it is going to be soon as possible if anything changes in the eruption.
This is a short update on the eruption in Fagradalsfjall mountain on 23-April-2021 for the last week. Information is provided with best effort. The volcano that is erupting is Krýsuvík-Trölladyngja volcano system.
No major changes have been seen this week in the eruption. Here are the highlights.
According to last chemical analyse of the lava. The magma that is coming up is getting more primitive and from deeper part of the mantle. This increased the chance that the eruption is going to go on for months to years. Details can be found here on Twitter or here on Facebook.
Thickness of the lava is in most places just 16 meters. In Geldingadalur valley the thickness is at most 50 meters and getting thicker as the eruption continues and the valley slowly fills up. The lava doesn’t flow far and so it piles up next to the erupting craters.
At the writing of this article it seems that crater 1 is slowing down or shutting down. There seems to be some activity but it is low and mostly just gas is blowing out.
Craters continue to collapse as the eruption goes on. This happens at random and results in flood of lava happening.
The most active area now is the craters that opened on 7th of April and other time after that.
Other than this the eruption continues to be stable and the flow of lava is around 5m2/second according to last report I did read in the news.
This is a short update on the eruption in Fagradalsfjall mountain that is part of Krýsuvík-Trölladyngja volcano system.
The crater that started erupting on 5-April-2021 has stopped erupting. I am unclear when it stopped erupting but that must have happened sometimes in last few days.
Smaller vents have opened up but none of them have been able to create any major eruption crater. Most of those have also stopped erupting and been buried by fresh lava from others craters when they stopped erupting.
Earthquake activity has been appearing along the dyke in last few hours. I am unclear what that means at the writing of this article.
New fissures with steam or hot air have been reported south of current eruption. I am unclear where they are located. There don’t appear to be any new fissures north of the crater that has stopped erupting at the writing of this article.
Crater 1 has now started to smoke a lot. While the second vent continues to erupt a smaller eruption. I am unclear on why one of the vent is smoking as it has been doing for the last few days.
The eruption is now 1 month old today. The eruption started on 19-March-2021.
Amount of lava being erupted has increased since the start of the eruption according to latest reports.
I don’t have any more reports today but that might change without warning. If that happens. I am going to write an article soon as I can.
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