Thousands of residents are fleeing the Greek island of Santorini amid a wave of seismic activity.

Some 6,000 people have left the island by ferry since Sunday, according to local media, with emergency flights scheduled to leave today.

Authorities have closed schools for the entire week and warned against large indoor gatherings, but Prime Minister Kyriakos Mitsotakis has urged calm.

Santorini is a popular tourist destination known for its whitewashed buildings, but most of those leaving are locals, as February is outside the peak tourist season.

Several tremors, measuring up to magnitude 4.7, were recorded north-east of Santorini early on Tuesday.