More than 25 million m³ (883 million ft³) of magma has accumulated beneath Svartsengi, Iceland, since the last eruption in July 2025, the Icelandic Meteorological Office (IMO) reported on April 28, 2026. IMO said ground uplift continues at up to 2 cm (0.8 inches) per month, while magmatic dike propagation toward the Sundhnúkur crater row remains the most likely scenario and could lead to an eruption.
More than 23 million m³ (812 million feet³) of magma have accumulated beneath the Svartsengi volcanic system on Iceland’s Reykjanes Peninsula since the July 2025 eruption. Monitoring data released March 17, 2026, by the Icelandic Meteorological Office show this is the largest magma accumulation between eruptions since activity began on the Sundhnúksgígar crater row in December 2023. The official hazard assessment for the area remains unchanged and is valid until March 31.
Magma continues to accumulate beneath the Svartsengi volcanic system on the Reykjanes Peninsula, Iceland, as of March 3, 2026. The Icelandic Meteorological Office reports that uplift remains steady, seismic activity is minimal, and the total stored magma has reached about 22.5 million cubic meters since the last eruption in July 2025.
Magma accumulation beneath Svartsengi has reached its highest recorded level since the beginning of the ongoing eruption series in December 2023. The volume of magma beneath Svartsengi is now greater than what was recorded before the November 2024 eruption.
Magma accumulation beneath Svartsengi has reached a critical volume, matching the levels observed during the last eruption on November 20, 2024. A volcanic eruption could occur at very short notice, potentially within days or weeks, according to the IMO. The IMO has revised its hazard assessment which remains in effect until February 25.
Magma accumulation beneath Svartsengi is nearing the critical threshold, with over 90% of the volume recorded before the last eruption on November 20, 2024, increasing the likelihood of a dike intrusion and possible eruption. Seismic activity remains steady, and land uplift continues.
Magma continues accumulating beneath Svartsengi at a rate nearing the levels observed before the previous eruption. Deformation measurements confirm ongoing ground uplift, with geophysical models estimating that the subsurface magma volume is approaching the threshold associated with past magma intrusions.
A civil defense project to further raise earthen dams around the Svartsengi Power Plant was initiated on December 9, 2024. The effort aims to safeguard the infrastructure against future lava flows.
The eruption that started on November 20, 2024, at the Sundhnúks crater row near Grindavik, Reykjanes Penisula, Iceland is now the second largest in the volume of the eruptions that have occurred in the Sundhnúks crater row since December 2023.
Eruptive activity near Grindavik, Iceland, remains steady on November 28, 2024, with the eruption continuing from a single vent and lava flowing east and southeast. Gas pollution caused by northeast winds at 35 – 55 km/h (20 – 35 mph) was moving toward Grindavík today and was forecast to spread to nearby areas as the weather patterns change.
