A state of emergency was declared on Santorini Thursday after a magnitude 5.2 earthquake shook the Greek island late Wednesday. The tremor is the latest — and strongest — in a series of quakes that have struck the island since last week,

Greece’s government has declared a state of emergency on Santorini after hundreds of undersea earthquakes shook the resort island for nearly a week.

A 5.2 magnitude tremor has been detected between the Greek islands of Santorini and Amorgos — the most powerful recorded since activity started on on January 31.