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).”
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.
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.
The frequency of the quakes, which continued throughout Sunday night and into Monday, has worried residents and visitors.
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.
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.
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.”
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 meters (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.
“All scenarios remain open,” Papadopoulos wrote in an online post. “The number of tremors has increased, magnitudes have risen, and epicentres 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.”
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