Stefanos Sink

January 25, 2019

Stefanos (1)_Farmalopolous

Photographer: Antonis Farmakopoulos
Summary Authors: Antonis Farmakopoulos; Stu Witmer

Seen above is the Stefanos sink, one of several explosion sinks and vents created by a rising magma chamber beneath the island of Nisyros, Greece. About 1000 ft (300 m) in diameter and 80 ft (25 m) deep, Stefanos is near the southern end of the stratovolcano's caldera that makes up the entire island. Recent activity on the island include fumaroles and hot springs. An element of the South Aegean Volcanic Arc, the Cos caldera which incudes Nisyros, formed as the northward-moving African tectonic plate subducts the Aegean microplate. Photo taken on August 11, 2018. 

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