Santorini shows signs of restlessness 14 March 2012 Posted by admin in activity reports, Greece, Santorini.trackback The almost unbelievable beauty and visual drama of the Greek island group known as Santorini in the southern Aegean Sea is the result of a complex geological history. Santorini is the site of several shield volcanoes which overlap and are cut by a number of calderas created by successive very large explosive eruptions (180,000 years ago, 70,000 years ago, 21,000 years ago and...