Magma is collecting below Iceland’s Reykjanes peninsula again and experts say another eruption could happen at any time. The land by Svartsengi has now risen more than it did before last month’s eruption. The speed of uplift has also increased again, after slowing down last week.
Magma chamber refilling
Following two months of earthquakes and land deformation, Iceland’s Reykjanes peninsula experienced a short but powerful eruption from December 18 to December 21. According to Benedikt Ófeigsson, Coordinator of Deformation Observation at the Icelandic Met Office, the magma chamber beneath Svartsengi has now replenished 75% of the magma expelled by the December eruption.
These developments indicate that another eruption is on the way, Benedikt told RÚV. The most likely location is the Sundhnúkur Crater Row, between Stóra-Skógfell and Hagafell mountains. According to Benedikt, the eruption could begin there “at any time.”
Blue Lagoon remains open
An overnight evacuation order remains in effect for the nearby town of Grindavík (pop. 3,600). The town was evacuated on November 10 due to powerful earthquakes that damaged roads, homes, and infrastructure in and around the community.
The nearby Blue Lagoon was reopened to visitors on Saturday. Benedikt says an eruption is not likely to occur in the area around the lagoon. “So even if an eruption begins, there will most likely be plenty of time to evacuate people.”
The Reykjanes peninsula, the location of Keflavík International Airport and a stone’s throw from Iceland’s capital, Reykjavík, has entered a period of increased volcanic activity that could last hundreds of years. The four eruptions that have occurred on the peninsula since 2021 have not impacted infrastructure or flights. The earthquakes and deformation preceding the December 2023 eruption, which caused damage in and around Grindavík.