Part of the summit complex of Gorely volcano is seen in this view from the south. Gorely, also known as Gorely Khrebit, is one of the most active volcanoes in southern Kamchatka. Five small overlapping stratovolcanoes, constructed within a large caldera, contain 11 summit and 30 flank craters. Historical eruptions, consisting of vulcanian and phreatic explosions of moderate volume, have commonly produced ash columns that are visible from Petropavlovsk, Kamchatka's largest city. Photo by Phil Austin, University of Southern Florida, 1992 (courtesy of Pavel Kepezhinskas).