SEISMIC REFLECTION PROFILING IN LAKE KURILSKOE

Abstract

Two calderas have been located in Lake Kurilskoe by seismic reflection profiling. One of them, Kurilskaya, is about 7 km across and occupies the central and southern parts of the lake. The other caldera, Il'inskaya,is situated in the northeast of the lake and extends beyond it. The volume of magma erupted before the formation of the Kurilskaya caldera is over 35 km. The Severnaya Bay is believed to be of erosional rather than explosive origin as was previously hought.