Revised parameters of the September 6, 1866 Earthquake, which was erroneously located in Avacha Bay

摘要

The catalogs of the Kamchatka region contain a damaging earthquake of M = 7. 0 that occurred about 100 km east of Petropavlovsk-Kamchatskii City on September 6, 1866. The basis for this location was a single source, namely, the catalog of the French researcher Alexis Perrey. All later investigators of historical seismicity in Kamchatka cite this source. At present, the earthquake referred to is one of the controlling events for the estimation of earthquake hazard for Petropavlovsk-Kamchatskii City and its environs. The goal of the present study is to combine and examine all known and additional sources that contain some information on this event. The materials thus collected provide grounds for considerable revision of this earthquake's parameters.