Materials of the International Conference
50th Anniversary of the International Geophysical Year
and Electronic Geophysical Year

16-19 September 2007 • Suzdal, Russia

Digital recording of groung motion produced by 2006.04.20, Mw = 7.6 Olutorskoe earthquake in Koryakia and its aftershocks

A. A. Gusev1, 2, O. S. Chubarova1, V. N. Chebrov2, and I. R. Abubakirov2

1Institute of Volcanology and Seismology, Far Eastern Branch, RAS, Geophysical Survey, Kamchatka Branch, RAS, Petropavlovsk-Kamchatsky, Russia

2Geophysical Survey, Kamchatka Branch, RAS, Petropavlovsk-Kamchatsky, Russia

Abstract

The recent Olutorskoe earthquake (Mw = 7.6) 20 April 2006 was the largest known earthquake located in the Koryakia region (NE Russia). For this event, broadband digital records of main shock and aftershocks were obtained at regional and local distances in Kamchatka and Koryakia. Fourier and response spectra and peak ground accelerations were determined and analyzed. An unexpected feature of ground motion is significantly enhanced Fourier spectra in the low-frequency range (below 0.5–1 Hz). The obtained information shall permit us to estimate possible ground motions from future strong events in this area. Contributions of such factors as earthquake source, seismic wave propagation paths and geological conditions of a site shall be estimated.

Citation: A. A. Gusev, O. S. Chubarova, V. N. Chebrov, and I. R. Abubakirov (2007), Digital recording of groung motion produced by 2006.04.20, Mw = 7.6 Olutorskoe earthquake in Koryakia and its aftershocks, in: Materials of the International Conference '50th Anniversary of the International Geophysical Year and Electronic Geophysical Year', GC RAS, Moscow, doi:10.2205/2007-IGY50conf.

© 2007 Geophysical Center RAS and authors


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