A fresh series of quakes hit the Greek island of Santorini early on Thursday, part of an unprecedented seismic wave that has baffled scientists and led to a mass exodus of residents.
Seven successive tremors measuring over 4.0 magnitude were recorded in the early morning by the Athens Geodynamic Institute, Greece鈥檚 leading authority on earthquake analysis.
This was after a 5.2 quake, the strongest so far since the weekend, was recorded on Wednesday evening.
Experts have so far been unable to give a definitive estimate on when the seismic activity will end, but stress that it is unprecedented.
鈥楾he intensity is falling but has not yet stabilised,鈥� the institute鈥檚 research director Athanassios Ganas told state TV channel ERT.
鈥榃e鈥檙e at the halfway point,鈥� the institute鈥檚 deputy director Vassilis Karastathis told the station.
The institute on Thursday said over 6,000 tremors had been recorded in the Aegean Sea near the islands of Santorini, Amorgos, Anafi and Ios since January 26.
Government spokesman Pavlos Marinakis on Thursday said Greece鈥檚 鈥榚ntire state mechanism has been mobilised鈥� to prepare for 鈥榓ny eventuality鈥�.
Over 11,000 residents and seasonal workers have left Santorini since the weekend by sea and air, with operators adding extra flights and ferries.
Experts say the region has not experienced seismic activity on this scale since records began in 1964.
鈥楾he most likely scenario is for the seismic activity to continue for certain days or weeks at the same intensity,鈥� the head of Greece鈥檚 earthquake planning and protection authority, Efthymios Lekkas, told Proto Programma radio.
Santorini lies atop a volcano which last erupted in 1950 鈥� but an experts鈥� committee on Monday said the current tremors were 鈥榥ot linked to volcanic activity鈥�.
No injuries or damage have been reported.
Rescue teams have been sent to the area as a precaution, and additional seismic sensors have been deployed.
Lekkas on Wednesday warned there were five areas at risk of possible rockslides on Santorini, including the ports of Fira and Athinios.
Schools on more than a dozen islands in the Cyclades island group in the Aegean Sea have been shut as a precaution until Friday, prompting many people with children to leave Santorini until the quake scare eases.
Santorini attracted about 3.4 million visitors in 2023. Upwards of a million of those were cruise ship passengers.
European travel agents contacted by AFP said the number of foreign visitors to Santorini at this time of year was minimal, with more bookings expected in the spring months.