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,

An accumulation of weak to moderate earthquakes has been recorded around the Greek island of Santorini since 24 January. The seismic activity is concentrated in the area between the islands of Santorini and Amorgos,

The swarm near Santorini appears to be related to the activation of a system of normal faults, fractures in the Earth’s crust where there is movement. Earthquakes are the result of a sudden release of tension built up by the movement along these faults.