Global Volcanism Program | Image GVP-02259
The Sashiusudake volcanic complex consists of an eroded Pleistocene edifice with a younger Holocene cone and summit lava dome. Geothermal activity continues at a SW-flank exploration area, seen here from the west. A small hydrothermal explosion took place at an exploratory well there in 1992. An eruption occurred in 1951 when local inhabitants reported weak explosive activity at the summit.
Photo by T. Vendelin (courtesy of Genrich Steinberg, Institute for Marine Geology and Geophysics, Yuzhno-Sakhalinsk).