ATHENS, Greece — 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.

Since last week, thousands of residents have left the island by plane and ferry, as hundreds of earthquakes continue to shake the region.

Santorini, a world-renowned tourist destination, is under a state of emergency after a powerful earthquake struck the island on Wednesday evening. The 5.2-magnitude quake is the strongest in a series of tremors that began last week and have prompted the evacuation of thousands of tourists and residents,