Hundreds of quakes have been registered every few minutes in the sea between the volcanic islands of Santorini and Amorgos, in the Aegean Sea, in recent days, prompting authorities to shut schools in Santorini and the small nearby islands of Ios, Amorgos and Anafi until Friday.

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.

Thousands of residents have fled the picturesque island of Santorini as relentless earthquakes continue to shake the renowned Greek tourist hotspot. Reports said hundreds were seen at the island’s port Tuesday morning,