Abstract
Ground motions during earthquakes largely depend on the properties of the soil near the surface. Moreover, there can be a tenfold difference between the responses of sites on rocky or loose soils, and this difference determines the importance of specifying ground motion during earthquakes for engineering applications. There is also a large variability of soil responses to earthquakes, depending on the position of a site. If a sufficient volume of seismic records has been accumulated at a seismic station, ground motion can be predicted with greater confidence for the respective site. The present work discusses the methodology and presents the results of calculating soil coefficients at seismic stations in the city of Petropavlovsk-Kamchatsky and neighboring villages relative to the Petropavlovsk reference station. Coefficients values have been obtained in the range of 0.1–10 Hz for 18 frequency bands with a relative width of 0.5. The averaged values of the dynamic amplification coefficients of response spectra on the station soils are obtained for the central filter frequencies. The records of 42 regional earthquakes with magnitudes of 3.9–8.3 are used in this publication.
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Translated by N. Astafiev
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Shevchenko, Y.V., Yakovenko, V.V. Spectral Characteristics of the Soil at Seismic Stations of Kamchatka. Seism. Instr. 56, 194–212 (2020). https://doi.org/10.3103/S0747923920020103
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DOI: https://doi.org/10.3103/S0747923920020103