Macroseismic evaluation of the impact of the Olyutorskii earthquake and its larger aftershocks

This paper presents the results from a macroseismic survey of the impact and consequences of the M W = 7.6 April 20(21), 2006 Olyutorskii earthquake in the area of the Koryak Autonomous Okrug and the adjacent areas in Kamchatka and Magadan regions. The earthquake was felt over an area of about 400000 sq. km with intensities of II to IX–X on the MSK-64 scale. Information was gathered from 37 population centers situated in this area and was used to present a summary of felt effects, to construct an isoseismals map, and to determine the macroseismic magnitude.