The strongest earthquake yet after days of near-constant tremors has been recorded near the island of Santorini, the famous Greek tourist haven now almost emptied of visitors and residents.

Mitsotakis's remarks come as many people in Santorini spent Sunday night outdoors, amid fears of potential damages to buildings during the quakes. Some focal points of the tremors have been recorded at a depth of just 2km (1.2miles) below the surface.

A series of earthquakes near the Greek island of Santorini have led authorities to shut down schools, dispatch rescue teams with sniffer dogs and sent instructions to residents including a request to drain their swimming pools.

The Greek island of Santorini is being rattled by dozens of tremors, prompting authorities to close schools and airlines to announce additional flights on Monday to help people leave the popular tourist destination.

Schools on the Greek island of Santorini have been told to close on Monday in response to an increase in seismic activity in recent days. Authorities have also advised against "large gatherings in enclosed spaces" across the island - a popular tourist destination known for its whitewashed buildings and blue domed churches.

Residents and tourists on the Greek island of Santorini have been put on high alert after an increase in seismic activity.

Families boarded ferries and extra flights were laid on to help people leave Santorini on Monday as dozens of tremors shook the Greek island for a fourth day.

The strongest earthquake recorded was magnitude 4.6 at 3:55 p.m. Sunday, at a depth of 14 kilometers (9 miles), the Athens Geodynamic Institute said.