Authorities have declared a state of emergency on a second Greek island as a series of earthquakes continued to rattle the south-eastern Aegean Sea region.

Greece has declared a state of emergency for the popular tourist island of Santorini following a surge in seismic activity. Hundreds of undersea tremors have rattled the island for almost a week, culminating in a magnitude 5.2 earthquake late on Wednesday – the strongest since the tremors began on 31 January.

The emergency measure announced on the island of Amorgos follows a similar decision for nearby Santorini on February 7 after thousands of unusual tremors were registered in an undersea area

The Greek island of Santorini is still shaking. Tourists and locals have already fled to the mainland, while emergency services on site are ready to intervene. An earthquake was even felt in Athens. Daily tremors since early February have driven tourists and thousands of residents to flee the Aegean island of Santorini.

A series of earthquakes shook the popular tourist island this week and prompted over 10,000 residents and workers to evacuate.

The Greek island of Santorini was struck by the latest in a string of earthquakes Tuesday, this time a 4.8 temblor. The government said it will backstop the island destination's tourist industry.

February marks the unofficial start of the tourist season in the Greek island of Santorini - when the first cruise ships are due to arrive and the Easter holidays approach. But with thousands of earthquakes shaking the island since January and experts unable to say when they will end,

Scientists have detected several thousand earthquakes, the vast majority of them with small magnitudes, in just over two weeks near Greece’s volcanic island of Santorini, the University of Athens’