Thousands of locals and travelers have evacuated the Greek island of Santorini amidst a spike in seismic activity.

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.

The Greek island of Santorini normally conjures up images of beautiful white buildings and dreamy blue seas, but since January this year, its home in the Aegean Sea has been hit by a near-constant string of seismic activity – so what’s going on?