Greece’s government declared a state of emergency on Santorini on Thursday after hundreds of undersea earthquakes shook the resort island for nearly a week. The ministry of civil protection’s announcement will provide authorities faster access to state resources.

More than 11,000 people have already left the island of Santorini following a series of tremors in recent days.

Greek authorities are monitoring increased seismic activity on the island of Santorini, Prime Minister Kyriakos Mitsotakis said on Friday, urging the public to remain calm and follow the advice of the civil protection service.