Scientists at the National and Kapodistrian University of Athens (NKUA) have recorded more than 7,700 earthquakes between Santorini and Amorgos in just nine days, raising concerns about potential landslides in the popular tourist destination.
The seismic swarm, which began on January 26, has already triggered small-scale landslides in several locations across Santorini, including Red Beach, Vlychada Beach, and Athinios Port, the university reported on Monday.
Most recent earthquakes were centred near Anydros island, with the largest measuring 4.9-5.0 on the Richter scale. Twenty-one earthquakes exceeded magnitude 4.0, with nine surpassing 4.5.
“The combination of geological factors, including volcanic rocks of varying composition and steep caldera slopes of up to 80 degrees, makes the area particularly vulnerable to landslides,” said Professor Efthymios Lekkas, who coordinates the research committee.
The university’s report highlighted that Santorini’s calderas have experienced landslides throughout history, triggered by earthquakes as far away as Crete and Rhodes. The current seismic activity could intensify these geological hazards, particularly if stronger earthquakes occur.
High-risk areas include the Old Port of Fira, which receives over 1.5 million visitors annually, Athinios Port, and areas beneath Oia village. Experts recommend enhanced monitoring using unmanned aircraft systems and ground sensors to manage landslide risks during the ongoing seismic sequence.
The Municipality of Thira has declared a state of emergency until 1 March to address the immediate needs arising from the seismic activity.
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