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

According to officials, more than 11,000 people have left Santorini, with around 7,000 departing by ferry and 4,000 people leaving by air. Hundreds of earthquakes have rocked the island, the strongest of which was a magnitude five tremor on Tuesday.

Thousands of locals flee the picturesque island as experts say rolling tremors ‘not linked to volcanic activity’.