Increased seismic activity suggests magmatic intrusion beneath Grjótárvatn, Iceland
Seismic activity near Grjótárvatn has increased with a tremor episode on January 2, 2025, indicating a potential deep magmatic intrusion. The IMO has reported earthquakes at depths of 15 to 20 km (9.3 to 12.4 miles) which suggests subsurface magma movement without surface deformation.











