SEISMIC EVENTS ASSOCIATED WITH THE 1996 VOLCANIC ERUPTIONS IN THE KARYMSKY VOLCANIC CENTER

Abstract

A study of the seismicity that preceded and accompanied eruptions in the Karymsky volcanic center revealed a relationship between the seismic processes caused by local tectonic movements and volcanic eruptions at Karymsky Volcano and in the Akademii Nauk caldera. The Karymsky eruption triggered the large (magnitude 7.0) Karymsky earthquake of January 1, 1996. This crustal tectonic earthquake reactivated a fault, through which magma began to rise and this magma was erupted in the Akademii Nauk caldera in the northern part of Lake Karymskoe. The distribution of hypocenters showed that there was an anomalous volume of rock beneath Karymsky Volcano, whose properties indicated that it was a magma chamber. The top of the chamber was at a depth of 4-5 km.