Around 200 earthquakes were recorded near Santorini within 48 hours causing thousands to evacuate the islands.
The strongest earthquake was 4.6-magnitude and struck the waters between Santorini and Amorgod on Sunday local time. In Athens, Prime Minister Kyriakos Mitsotakis chaired a meeting appealing for calm.
Around 9,000 people have evacuated since Sunday with additional emergency flights scheduled to leave on Tuesday (Wednesday AEDT).
While Santorini is a popular tourist destination, the majority of those leaving are locals, as February is outside the peak tourist season.
Santorini welcomes more than three million tourists annually to its villages built upon dramatic cliffs created by a massive volcanic eruption in around 1620 BC, considered to be one of the largest in history. The volcano erupts around every 20,000 years and Efthymios Lekkas, seismologist and head of the scientific monitoring committee for the Hellenic Volcanic Arc said we are a while away from the next eruption.
According to the BBC, seismologists believe the recent tremors to be minor but preventive measures have been put in place in the case of larger earthquakes. They are currently on alert not only for Santorini but also Amorgos, Anfi and Ios.
So far, no major damage has been reported on the island.