Emergency crews deployed on Santorini as earthquake swarm worries Greek experts

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• More than 200 undersea earthquakes have been recorded near Aegean Sea islands, popular summer vacation destinations, over the past three days.
• Local authorities are taking precautions, including deploying emergency crews, banning access to some seaside areas near cliffs and instructing hotels to drain swimming pools.
• Greek experts say the quakes are not linked to Santorini’s volcano, which was the source of one of the largest volcanic eruptions in human history more than 3,500 years ago.

Schools were closed and emergency crews deployed on the volcanic Greek island of Santorini on Monday after a spike in seismic activity raised concerns about a potentially powerful earthquake.

Precautions were also ordered on several nearby Aegean Sea islands — all popular summer vacation destinations — after more than 200 undersea earthquakes were recorded in the area over the past three days.

“We have a very intense geological phenomenon to handle,” Prime Minister Kyriakos Mitsotakis said from Brussels, where he was attending a European meeting. “I want to ask our islanders first and foremost to remain calm, to listen to the instructions of the Civil Protection (authority).”

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Mobile phones on the island blared with alert warnings about the potential for rockslides, while several earthquakes caused loud rumbles. Authorities banned access to some seaside areas, including the island’s old port, that are in close proximity to cliffs.

“These measures are precautionary, and authorities will remain vigilant,” Civil Protection Minister Vasilis Kikilias said late Sunday following an emergency government meeting in Athens. “We urge citizens to strictly adhere to safety recommendations to minimize risk.”

While Greek experts say the quakes, many with magnitudes over 4.5, are not linked to Santorini’s volcano, they acknowledge that the pattern of seismic activity is cause for concern.

The volcanic island of Nea Kameni, left, is seen from Fira, Santorini’s main town, as Greek authorities take emergency measures in response to intense seismic activity on the popular Aegean Sea holiday island in Greece, on Feb. 3, 2025. (AP Photo/Petros Giannakouris)

Government officials met with scientists throughout the weekend and on Monday to assess the situation, while schools were also ordered shut on the nearby islands of Amorgos, Anafi and Ios.

Residents are concerned

The frequency of the quakes, which continued throughout Sunday night and into Monday, has worried residents and visitors.

“I have never felt anything like this and with such frequency — an earthquake every 10 or 20 minutes. Everyone is anxious even if some of us hide it not to cause panic, but everyone is worried,” said Michalis Gerontakis, who is also the director of the Santorini Philharmonic Orchestra.

“We came out yesterday and performed. Despite the earthquakes, the philharmonic performed for a religious occasion,” Gerontakis said. “When you are playing, you cannot feel the quakes but there were earthquakes when we were at the church. No one can know what will happen. People can say whatever they like, but that has no value. You cannot contend with nature.”

Residents and visitors were advised to avoid large indoor gatherings and areas where rock slides could occur, while hotels were instructed to drain swimming pools to reduce potential building damage from an earthquake.

Fire service rescuers who arrived on the island on Sunday set up yellow tents as a staging area inside a basketball court next to the island’s main hospital.

“We arrived last night, a 26-member team of rescuers and one rescue dog,” said fire brigadier Ioannis Billias, adding that many residents, including entire families, spent the night in their cars.

Some residents and local workers headed to travel agents seeking plane or ferry tickets to leave the island.

“We’ve had earthquakes before but never anything like this. This feels different,” said Nadia Benomar, a Moroccan tour guide who has lived on the island for 19 years. She bought a ferry ticket Monday for the nearby island of Naxos.

“I need to get away for a few days until things calm down,” she said.

Tourists pass by closed shops in Fira town as Greek authorities prepare for a potential earthquake following the detection of more than 200 undersea earthquakes nearby, on the island of Santorini, Greece, on Feb. 3, 2025. (AP Photo/Petros Giannakouris)

Others said they were willing to take the risk. Restaurant worker Yiannis Fragiadakis had been away but said he returned to Santorini on Sunday despite the earthquakes.

“I wasn’t afraid. I know that people are really worried and are leaving, and when I got to the port it was really busy, it was like the summer,” Fragiadakis said. “I plan to stay and hopefully the restaurant will start working (for the holiday season) in three weeks.”

South Korean tourist Soo Jin Kim, from Seoul, arrived Sunday on a family vacation.

“We had dinner last night at the hotel and felt mild shakes about 10 times. But at midnight we felt a big one, a big shake, so I checked the news report. We are half-worried and half-looking to see what the situation is,” she said, adding she didn’t plan to change her travel plans.

Santorini volcano blew up 3,500 years ago

Crescent-shaped Santorini is a premier tourism destination with daily arrivals via commercial flights, ferries, and cruise ships. The island draws more than 3 million visitors annually to its whitewashed villages built along dramatic cliffs formed by a massive volcanic eruption — considered to be one of the largest in human history — more than 3,500 years ago.

That eruption, which occurred around 1620 B.C., destroyed a large part of the island, blanketed a wide area in feet of ash and is believed to have contributed to the decline of the ancient Minoan civilization, which had flourished in the region.

Although it is still an active volcano, the last notable eruption occurred in 1950.

Prominent Greek seismologist Gerasimos Papadopoulos cautioned that the current earthquake sequence – displayed on live seismic maps as a growing cluster of dots between the islands of Santorini, Ios, Amorgos, and Anafi — could indicate a larger impending event.

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“All scenarios remain open,” Papadopoulos wrote in an online post. “The number of tremors has increased, magnitudes have risen, and epicenters have shifted northeast. While these are tectonic quakes, not volcanic, the risk level has escalated.”

In Santorini’s main town of Fira, local authorities designated gathering points for residents in preparation for a potential evacuation, though Mayor Nikos Zorzos emphasized the preventive nature of the measures.

“We are obliged to make preparations. But being prepared for something does not mean it will happen,” he said during a weekend briefing. “Sometimes, the way the situation is reported, those reports may contain exaggerations… so people should stay calm.”