Scientists have detected several thousand earthquakes, the vast majority of them with small magnitudes, in just over two weeks near Greece’s volcanic island of Santorini.

Seismic activity around the Greek island of Santorini intensified on February 9, with a 5.0 magnitude earthquake recorded at 21:05, 15 km southwest of Arkessini, Amorgos, according to SKAI. The tremor was the strongest since the 5.

It welcomes around 3 million visitors per year, but between January 26 and February 8, the Seismology Laboratory of the University of Athens has registered a staggering 12,800 earthquakes in the Santorini-Amorgos zone, the strongest of these was last night at a magnitude of 5.3.