A mysterious swarm of earthquakes that occurred near the Greek island of Santorini in early 2025 was caused by rebounding sheets of magma slicing through Earth’s crust, finds a new study by an international team including a UCL researcher. Between late January and early March, the team analysed over 25,000 earthquakes that occurred between Santorini and Amorgos Islands. Hundreds of these were large enough to be felt at the time, with magnitudes exceeding 4.5. The seismic unrest prompted a local