New hot springs detected at Road 1 in Hveradalabrekka in Hengill volcano

The Icelandic Road administration did send out this news report today that new hot springs have been detected at Hveradalabrekka on Road 1 in Hengill volcano. This is an area that sees some heavy traffic. I can’t post pictures here because of copyright, but they can viewed in the news article below.

According to the Icelandic Road administration it seems that the area in question has been getting warmer for some time. According to them the current temperature around 86 degrees celsius. This is the area on a map from ja.is website.

The main road one as it is south of Reykjafell mountain in Hengill volcano. Also on this map is Þrenslahnjúkur and Hveradalir are marked in on the map.
The main road 1 on Hengill volcano. Close to the area that is now warming up. Screenshot of map from ja.is.

Next is to check why this is happening and if there is any risk the Road 1 in this area and if anything can be done if that’s the case. I am unclear on what is going on, since this area (I don’t think this one, but nearby) is known for hot spring activity. There has been some earthquake activity at this location in recent months and that is possibly connected to this new hot spring activity. On 9th of May this area had a Mw1,1 earthquake at the depth of 4 km. Over a time period of 130 days, the number of earthquakes in this area is not unusual for Hengill volcano or Reykjanes peninsula in general. This area of Road 1 might continue to get warmer over the next few months.

Vegagerðin news in Icelandic

Jarðhitavirkni undir Hringvegi (vegagerdin.is) – has pictures of the area.

Update

Rúv has published a news about this and has a video of the area where this new hot spring activity is happening. This is new because vegetation is in this area and is now dying off.

Allt að 100 gráðu hiti mælist við veginn (Rúv.is, Icelandic)

Update 2

Icelandic Road Administration web camera shows the new hot spring area. The web camera can be viewed here.

Article updated 12. May 2023 at 20:41 – Reykjavík time (+0 GMT)
Article updated 14. May 2023 at 13:01 – Reykjavík time (+0 GMT)

Earthquake swarm in Þórðarhyrna volcano

Today (11. May 2023) there was a earthquake swarm in Þórðarhyrna volcano. This are small earthquakes, but their location and depth suggest that this is a dyke intrusion taking place at this location.

Earthquake swarm in south-west part of Þórðarhyrna volcano. This volcano is located in Vatnajökull glacier, just few km south of Grímsfjall volcano, is part of the Grímsfjall volcano fissure swarm. Time on image 11. May. 23 13:10.
Earthquake activity in Þórðarhyrna volcano. Copyright of this image belongs to Icelandic Met Office.

Þórðarhyrna volcano is part of Grímsfjall volcano fissure swarm, that connects to Laki eruption fissures. Last eruption in Þórðarhyrna volcano was in the year 1902 to 1904 and had the VEI=4 according to Global Volcanism Program report that can be read here.