Posted on by Jón Frímann

Update on the eruption in Fagradalsfjall mountain on 26-April-2021

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.

6 Replies to “Update on the eruption in Fagradalsfjall mountain on 26-April-2021”

  1. Jón, many thanks for your update. I expect you noticed that for around 7 hours from 7:10 this morning there were no new earthquakes, then a vew few started to be ‘back-filled’ on vedur.is. Do you know if there was/is a technical issue, or is just that there are very, very few? I does seem odd for a few to be added some hours after they happened.

    1. According to a news report on mbl.is this evening there was a technical failure at Icelandic Met Office starting around 06:00 and going on all day. Resulting in the website not being updated properly. It has also just been a quiet day it seems when it comes to earthquakes.

  2. Hi all. Not sure if it will lead to anything but on the mbl.is webcam the area just in front of the lava field has started to gas/steam. This area wasn’t doing anything earlier in the day.

  4. This was seen and reported over several pages on the internet. This was also observed in the crater. This are small whirl wind I think.

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