Iceland geology

This is a short article about the situation in Grindavík. Information here might go outdated quickly without warning.

Sorry for the late update. I was updating my computer and its been more of a problem than I expected. Since I build my own computers, rather than buying already assembled computer.

Overview of the situation in Grindavík

Inflow into the dyke seems to have stopped one to two days ago. This means that it has started to cool down, since no inflow of fresh magma means it starts to form into rock. This is going to take years and in some areas decades cool all the way through. This also means that the rift valley is no longer moving as much as it was doing and in some areas has stopped completely. There is a crust instability in and around Grindavík town because of the rift valley, but this instability is now lower compared to first few days after 10. November. This might continue for years, even after all eruption activity stops few hundred years into the future.

Inflation has now reached almost the same level as 10. November, with only 50mm to go until the same level is reached. This inflation seems to be creating cracks in the ground around Svartsengi power plant. But the news was not clear on exact area of the formation of those cracks in the ground. Svartsengi, Grindavík and the area around the dyke continues to be a danger zone as defined by Icelandic Met Office.

The original image can be found here on Icelandic Met Office website.

This is not over and it is impossible to know when next sequence of events starts in Svartsengi and there is going to be little to no warning when it starts next. Icelandic Met Office has sad that at most there is going to be a two hour warning before an eruption starts, but it might even be shorter time. Making staying in Grindavík and nearby area all hours of the day a dangerous thing to do.

This is the last update until something happens in Grindavík.

This is a short update and information here can go outdated quickly and without warning.

There has not a lot been happening in last few days. Here is a overview for the last few days.

• Inflation continues in Svartsengi. Over the 90 day GPS data period. The inflation has reached the zero line. That means the inflation is now at the same level as it was before 25. October 2023. It still has about 100mm to go before it reaches 10. November levels and the sill broke and the magma dyke happened. But it is important that the GPS data from 2020 shows that Svartsengi lowered to 140mm below the January 2020 starting point with the GPS data.
• The GPS data from January 2020 for Svartsengi show that total inflation in the area is around 230 to 250mm. This information can be viewed here (this is a none https link, so it might require an exception in Google Chrome or just use Mozilla Firefox). There’s a lot of GPS data on this site. Some of it show short term GPS data that are from last 12 hours daily update. Looking for the correct data image might take some time.
• Inflation might need to reach 10. November levels before anything happens again. The dyke even on 10. November seems to have changed how things happen in Svartsengi so it is impossible to be sure what happens next.
• While the magma collecting phase is ongoing. Things are going to be quiet with the earthquake activity in this area.
• The rift valley, best I can see, continues to change and sink and rise. Resulting in ongoing damage to Grindavík town.
• There’s less news about this at currently. That gives me less information on what is going on.

Next update should be by Friday 8. December, unless something happens.