The Greek island of Santorini has been rattled by a further earthquake.The latest quake, one of thousands to hit the volcanic island in recent weeks, is the strongest so far with a magnitude of 5.3.Medical staff staged a hospital evacuation drill as scientists said it is unclear whether the weeks of highly unusual seismic activity precede a larger quake.

On Monday, a magnitude 5.3 earthquake struck in the sea area between Santorini and Amorgos in the Cyclades. This seismic event, noted as the strongest in recent weeks, resulted in no casualties or damage reported. The epicenter of the earthquake was located in the sea area 14 kilometers south-southwest of Amorgos.

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