Sea-floor sensors have been submerged at the bottom of the Santorini spectacular Caldera to monitor geological activity, within the framework of a scientific mission completed on July 23. The operation, launched on July 13 by an international team of scientists from Greece, France and Spain, is designed to monitor underwater volcanic activity in the region following last year’s unrest, as well as to look for signs of deformation.

In 2011, small earthquakes were recorded and GPS measurements showed that the eastern and the western edge of the caldera were removed by 14 cm between January 2011 and January 2012. The volcanic activity, which declined in 2012, has calmed down, but remains under scientific monitoring.