The Greek island has a long history of earthquakes, but what is causing the recent series of quakes has scientists perplexed.

Multiple earthquakes are rattling Santorini, a volcanic island in Greece, prompting authorities to dispatch rescuers with tents, a sniffer dog and drones, and to shut schools on four islands. Residents have been warned to avoid indoor gatherings,

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