A 5.3 magnitude earthquake struck the Greek island of Santorini late Monday, the strongest in a series of thousands of tremors that have rattled the

A state of emergency has been declred in Santorini, a volcanic island and popular tourist destination in Greece, as an 'earthquake swarm' that began earlier this month continues. Since 31 January, more than 800 tremors with a magnitude of three and above have been recorded.