Repeated earthquakes are rattling Greece’s volcanic island of Santorini. Scientists say the quakes aren't related to a slight increase in volcanic activity that has also been registered recently.

Experts say the Greek island of Santorini has been hit by more than 1,000 earthquakes, but they're not linked to the region's active volcanoes.

Precautions were also ordered on several nearby Aegean Sea islands - all popular summer vacation destinations - after more than 200 undersea earthquakes were recorded in the area over the past three days.