Conical Atsonupuri stratovolcano, it summit dappled by light snowfall, is seen here from the SW. The volcano forms a prominent peninsula joined to the SW side of Iturup Island. A 2-km-wide caldera was subsequently largely overtopped by a central cone that forms the present 1206-m-high summit. Strombolian eruptions have dominated the history of this basaltic volcano, leaving slopes susceptible to slumping and erosion. Only two historical eruptions are known at Atsonupuri, during 1812 and 1932. Photo by Alexander Rybin, 2001 (Institute of Marine Geology and Geophysics, Yuzhno-Sakhalin).