Information here might go outdated quickly and without warning. This article is written on 30. November 2023 at 23:44 UTC.
There isn’t much change happening at the moment. People are now allowed to be in Grindavík between 07:00 to 19:00 I think the time frame is. Earthquake activity is at minimum currently.
Deepest hole that has been discovered so far is 25,7 meters deep. It is deeper, but at 25 meters the ground water level starts and hides the actual depth of this crack. Rúv news about this found here with pictures and videos in Icelandic.
New cracks and the ground continues to sink and move in most of areas of Grindavík. This is resulting in more damage to houses and streets in Grindavík town.
The harbour area in Grindavík has lowered 30 cm to 40 cm. That was the news two days ago. I think the harbour area continues to sink. This might be a signs of future problems if the ocean manages to flow into this area.
Svartsengi volcano continues to inflate at the rate from 10mm to 40mm a day. The last 24 hour inflation was around 40mm. Earlier the inflation had just been 10mm a day. Suggesting a increased flow of magma into Svartsengi volcano.
Something might start to happen around or after 9. December when the sill in Svartsengi is expected to reach the same pressure it was on 10. November when it broke the first time and emptied and created the dyke that formed under Grindavík and the nearby area.
This is a short update for Grindavík and nearby area on 28. November 2023. This article is written at 23:22 UTC. This is a short update and information here can go outdated quickly and without warning.
Last few days have been quiet with little or few earthquakes. There have been earthquake swarm activity at times, suggesting that magma is trying to push at faster rate into the crust at Sundhnúkagígar and Sundhnúkar mountain. I don’t know what the current rate of magma inflow is.
Magma continues to flow into the dyke. I don’t know how fast that rate is.
The dyke is wider than originally thought. This means it cools down more slowly. The dyke is widest around Sundhnúkar and Sundhnúkargígar area.
Eruption can start without warning in Sundhnúkar or Sundhnúkargígar and that area.
New cracks continue to form in Grindavík, along with sink holes and other issues that is creating.
Inflation at Svartsengi is around 10mm/day and up to 40mm/day. Currently, the inflation has slowed down to 10mm/day. This can change without warning.
Top of Keilir mountain has moved according to the news. I don’t know how much. But this is a displacement.
Rocks with the size of mobile homes have moved and rolled down from mountains.
Cracks are forming in a wide area around the dyke according to the news. Making it dangerous to travel in the area around Grindavík because of this new cracks in the ground.
The event in Grindavík and nearby area is not over. It is ongoing, this is just a quiet time period that is currently happening. This quiet time period is going to happen frequently in the Reykjanes volcano system. I don’t know why that is the case, this is the reality of what is going on.
Article updated at 23:56. I forgot to add few things.
This is a short update on the situation in Grindavík and nearby area on 24. November 2023. This article is written at 18:47 UTC.
Information in this article can go outdated without warning and quickly if something happens.
This activity has slowed down for now. This means I am going to be posting update less here, unless something changes and that can happen without warning.
There is movements on cracks and new holes and cracks are opening up or appearing as the ground collapses and exposes the fissure.
Earthquake activity has reached a low point. This might be just for a short period of time.
The inflation in Svartsengi is today around 140 to 160mm from 10. November 2023. The inflation each day is around 30 to 40mm.
The area that is inflating in Svartsengi is larger now compared to the area that inflated before 10. November 2023. This has created a uncertainty in the GPS data as I understand the situation. The rift valley is also creating issues in the GPS data as parts of him continue to sink and are going to continue to sink and lower nearby area with it. How much that is difficult to know.
The event that happened on 10. November 2023 was the quickest event to happen in recorded history of Icelandic Met Office. According to their report and the news.
It is my view that the current low is just going to last for few more days, at most few weeks because of the ongoing inflation in Svartsengi. It is my view that it is going to take around 30 days until next dyke activity happens, that is around 10. December when that might happen. But the situation is changing quickly and impossible to know for sure how it develops in next few days to weeks.
If anything happens. I’ll post update soon as I can do so.
This is a short update. Information there might go outdated quickly and without warning. This article is written on Wednesday 22. November 2023 at 21:32 UTC.
There’s little news to report at this moment. Mostly because of bad weather. The progress of the dyke has also stalled from earlier, or this might be it for now. It is difficult be sure currently.
The inflation at Svartsengi (upwards movement) stopped in the last 24 hours. This either means this series of events is stopping for now or something major is about to happen. I am not sure. Risk of this being a error are small, but this might be interference from weather (rain, snow).
The air code for Reykjanes volcano has been downgraded to yellow.
The situation in Grindavík and in Sundhnúkagígar and the nearby area can still change without much warning. Since the ground is very fractured there and is not going to be much resistance to any magma movements in the near future.
If anything more happens. I’ll update soon as I can.
This is a short update on the situation in Grindavík. This article is written on 20. November 2023 at 22:22 UTC.
There’s a storm in Iceland until 23. November 2023. When the wind is going to start die down again. This means that Icelandic Met Office is going to record fewer earthquakes because strong ocean waves and wind.
There has not been much change since yesterday. This is normal.
Inflation in Svartsengi is up to 30mm/day and this is a increase, since inflation used to be around 15mm/day.
Since Friday 10. November 2023 the inflation in Svartsengi has been around 150mm over the last 11 day time period.
It took 17 days from start on October 25 of the magma inflow into the Svartsengi dyke until it broke on 10. November and the created the Sundhnúkar to Grindavík dyke.
It is a question what happens when next 17 days come up. Because whatever the hold is for the magma in the dyke in Svartsengi is going to break it is going to start the process as happened on 10. November 2023 and possibly into the current dyke, or possibly create a new dyke next to the current one (its a possibility, not a large one, but it is there).
There has not been a lot of information released today and I don’t see a lot on seismometers and other instruments around Grindavík town currently.
This type of quiet period before an eruption are common. Why is not well understood. Eruption might not happen, but it is not likely that nothing is going to happen in this. Both is magma too close too the surface and there’s too much inflow of magma into the dyke at Svartsengi. This is how I see the current situation.
If anything happens. I’ll post update soon as I can.
This is a short update on the situation in Grindavík on 17. November 2023. Information here can go outdated quickly and without warning.
Grindavík town continues to sink as the rift valley continues to move. The speed of sinking has slowed a little according to the news today.
Earthquake activity has slowed down in last few hours (this is written around 22:51 UTC). What that means is unclear.
Some houses in Grindavík town have been completely destroyed. Iceland has a natural disaster fund for this type of situation and that is going to cover the owners loss according to the news.
It took me a week. But it seems that this dyke intrusion under Grindavík town is because of the magma sill (dyke) under Svartsengi. That area has inflated around 110mm in a week. That is a inflation of 15mm/day based on my best calculations. That is a lot of inflation, since before 10. November the inflow of magma into Svartsengi was at most 8m3/sec according to measurements of Icelandic Met Office.
The sill in Svartsengi created a lateral dyke in Sundhnúkar and nearby areas. When the pressure in the sill is high enough again it is going to push the magma into the dyke at Sundhnúkar again with the same force as it did before. How long that takes I don’t know. Last time this was from 25. October to 10. November. That’s seventeen days, but there was a lot of deeper sills in Svartsengi and its impossible to know much, if anything flowed form them into the dyke. This is my personal view, it might be wrong. But this is what I am reading from the data.
Risk of the eruption remains high because there’s a ongoing inflation at Svartsengi. When a eruption starts is impossible to know.
If anything happens. I’ll post update soon as I can.
This is a short update on what is happening in Grindavík on 16. November 2023. Information here can go outdated quickly and without warning.
The situation is mostly the same as yesterday (15. November 2023), but few things have happened and that is enough for me to publish this article.
Sulfur dioxide has been detected in a drilling hole in Svartsengi. This drilling hole is such that it end point is close to Hagafell mountain east to Svartsengi power plant. I think this might be a cold water hole. It has a depth of 2,5 km. This means that magma is at or close to that depth. Ground water in this area doesn’t go deeper than 1,9 to 3 km I think (I am not sure on how the fresh water ground level works in this area).
Eruption is expected from hours to day based on most recent measurements from Icelandic Met Office.
Grindavík town continues to sink according to news today (16. November 2023). Difference between days can be as much as 25 cm.
Mbl.is (Morgunblaðið) has a video of the damage done by this sinking on their website here. Its in Icelandic.
The situation for now is quiet, but that might only last for few hours to days longer before an eruption starts. Since earthquake activity strongly suggests that magma is looking for a way to the surface. While some magma is at shallow depth of 400 to 500 meters. There’s not enough of it to start an eruption. That can change without any warning at any time in this situation.
I’ll write updates if anything more happens here as quickly as I can.
This is a short update on what is happening in Grindavík on 15. November 2023. Information here might go outdated quickly.
In general, not much has changed since yesterday (14. November 2023).
There’s no change in earthquake activity. Strong wind in the Reykjanes peninsula might be masking some of the smaller earthquakes.
Part of the harbour area has started to sink according to news. I am not sure how much, but I think it might be considerable sink.
Speed of the sink in some areas of areas inside Grindavík has increased from 7 cm for each 24 hours to 12 cm for each 24 hours since yesterday. Some areas inside Grindavík have lowered as much as 2 meters or more.
Inflow of magma into the dyke continues to be at 75 m3/second according to news reports today. This is a lot of magma inflow into the dyke. The eruption in Holuhraun in 2014 and 2015 had an flow of 90 m3/sec when it was the most.
It is reported on mbl.is that it is now considered that magma might be flowing directly from the main magma chamber at 20 km to 40 km depth under this location in Reykjanes peninsula. That news is in Icelandic here.
Parts of Grindavík town has lost power, hot and cold water because of sinking of the ground and movements. Emergency repair is going to be attempted tomorrow if it is safe.
Eruption might happen at Sundhnúkar and Hagafell, where the highest flow of magma is happening according to Icelandic Met Office and the news.
Eruption at many craters at the same time is what is going happen here. Based on what I am seeing. That means more lava covering larger area quicker than the small eruptions in Geldingadalir, Meradalir and at Litli-Hrútur. Where it was just one crater and a small eruption.
Something is holding back the magma from reaching the surface. What that is unclear. But magma is at shallow 500 meters or less according to measurements done by Icelandic Met Office. This shallow depth means that magma can start erupting without much warning or notice in the dyke.
There is a chance that parts of Grindavík town might sink under the ocean because of the ground sinking. When eruption starts, what goes under lava depends on where the eruption is going to start and where the lava is going to flow. Both are random events that is impossible to know anything about.
If anything happens. I’ll post update soon as I can. If anything happens tomorrow I’ll write about it. Otherwise I plan on publishing next article on Friday 17. November 2023. Since changes at the moment are not that big changes between days currently.
The magma is at 400 meters depth, where it is at its most shallow. I am not sure on location, but I think it is just north-east of Grindavík town.
There is strong wind on Reykjanes peninsula. That normally hides some of the smaller earthquakes happening. Icelandic Met Office continues to record 700 to 3000 earthquakes each day. Most of them are along the dyke and most of them are in the magnitude range of Mw0,0 to Mw3,1. With the stronger ones happening least often.
Inflow of the magma into the dyke is at the writing of this article around 73 m3/s to 75 m3/s. On Friday 10. November that inflow was 1000 m3/s.
Sulfur dioxide was detected today north of Grindavík. That suggests that magma might be at shallow depth in the dyke area.
News reports today did say that the area in Grindavík and nearby continues to sink around 7 cm over 24 hour time period. This might be uneven process depending on the area.
Lakes south of Grindavík have been seen growing, as the area continues to sink and get lower. It is a question of parts of this area is going to get flooded by the ocean soon. This is reported on Facebook by Eldfjalla- og náttúruvárhópur Suðurlands.
The GPS station just north of Grindavík has lowered by 1400mm since Friday 10. November 2023. The stations on the east are going up, some much as 1 meter. While the GPS stations on the west side are lowering.
This situation changes quickly and often from hour to hour. I’ll post new updates if something major happens, quickly as I can.
Article updated on 15. November 2023 at 00:21 UTC. – Removed information that might not be correct.
This is a short update. Information here can go outdated quickly and without warning. I am sorry for the Google Adsense popup ads. They turned them on without telling me and I can’t turn it off. I never run this type of ads because this is just annoying pop-up and I don’t allow that on my website. Google Adsense ads are going to be gone by the end of this month anyway (regardless of anything else).
The situation is similar to yesterday. Earthquake activity continues to drop for now. But that might be a short quiet because the dyke and the rift valley continues to grow. Inflow of the magma continues, at slightly slower rate than on Friday 10. November 2023.
The inflow of magma on Friday 10. November 2023 was 1000 cubic meters per second according to Icelandic Met Office and experts.
The rift zone that is lowering is on the western side of the Grindavík town. The east side is rising up to almost the same amount. Parts of Grindavík have lowered around 1 to 2 meters. Some of the cracks in the grounds are up to 20 meters deep or deeper.
There is a lot of damage in Grindavík to many houses. If not from earthquakes, then from the formation of the rift valley.
Eruption risk remains high and the dyke seems to holds its length at 15 km. This can change without warning.
The rift valley is now around 2 km wide according to the news. The rift valley continues to get wider according to measurements.
There has not been any drop in harmonic tremor on SIL stations next to the dyke, even if earthquake activity has lowered. This is because of the ongoing inflow of magma into the dyke.
It is not possible to know what happens next. It is my view that an eruption is going to start in this area. This is a start of a activity that is going to last for a while until it quiets down.
This dyke activity might also upset the volcanoes Fagradalsfjall and Reykjanes and what is happening in them. Anything can happen in them without warning. If not eruption, then earthquake activity.
I’ll post update when I have some new information about this situation.
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