The Late Bronze Age eruption emptied a magma chamber and left the caldera that today's islands ring. An intense earthquake swarm in early 2025 put the island under a state of emergency, a reminder that the system is far from extinct.
Erupted in the 20th century
Shield volcano · Dacite
0 events in 90 days
Seismicity within 50 km radius, active VAAC ash plumes, and tectonic plate boundaries.
No catalogued earthquakes within 50 km in the last 90 days.
Santorini is an active Shield volcano formed in an active Subduction zone / Continental crust (> 25 km). Dominant lithology: Dacite.
Official catalogue parameters, coordinates, elevation and geotectonic classification.
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Catalogue: Smithsonian Institution, Global Volcanism Program.Smithsonian GVP profile