Greece has declared a state of emergency on Santorini after a series of earthquakes shook the popular tourist island this week.
More than 11,000 residents and seasonal workers have left the island by sea and air.
Since Sunday, hundreds of near-constant tremors have been recorded in the sea between Santorini and the island of Amorgos.
The strongest tremor - with a magnitude of 5.2 - happened last night.
Authorities warned of a high landslide risk on parts of Santorini and shut schools, dispatched rescuers and advised residents to avoid ports and indoor gatherings.
Army, fire service and police units have been deployed.
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The Climate Crisis and Civil Protection Ministry said the state of emergency would be in place until 3 March to allow it to respond to the population's needs and to the consequences of the seismic activity.
Experts said the region has not experienced seismic activity on this scale since records began in 1964.
No injuries or damage have been reported.
Read more:
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Greece is one of Europe's most earthquake-prone countries, but seismologists have said the tremors are unprecedented and could last for weeks or months.
Athens Geodynamic Institute, the country's leading authority on earthquake analysis, said: "The intensity is falling but has not yet stabilised".
"We're at the halfway point," it added.
The institute said that over 6,000 tremors have been recorded near the islands of Santorini, Amorgos, Anafi and Ios since 26 January.
Santorini took its current shape following one of the largest volcanic eruptions in history, around 1600 BC.
The island attracted about 3.4 million visitors in 2023. Upwards of one million of those were cruise ship passengers.
