The last huge eruption of the volcano was 3.600 years ago, in the late bronze age. Millions cubic meters of ash and pumice were blown to a height of up to 36 km above the island. The removal of such a large volume of magma caused the volcano to collapse, producing a caldera. Ash fell over a large area in the eastern Mediterranean and Turkey.This ash buried the ancient city at Akrotiri and is feeding the myth of lost Atlantis.The Kameni Islands, Palea and Nea Kameni, formed after the caldera. Eleven eruptions since 197 B.C. have made the two islands. The most recent eruption at Santorini was in 1950 on Nea Kameni, the northern island. The eruption was phreatic and lasted less than a month. It constructed a dome and produced lava flows..