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' crisis management committee said Tuesday,

The threat of a more major earthquake seems to have subsided on the most visited of the Greek islands but experts disagree on the origin of the tremors that have caused 11,000 of the 15,000 permanent residents to flee.

The top tourist island of Santorini has been struck by its strongest earthquake in weeks amid a wave of increased seismic activity in the region.