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SIMULATION OF GROUND MOTION FROM STRONG EARTHQUAKES OF KAMCHATKA REGION (1992-1993) AT ROCK AND SOIL SITESстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 22 декабря 2017 г.
- Автор: Pavlenko O.V.
- Журнал: Pure and Applied Geophysics
- Том: 170
- Номер: 4
- Год издания: 2013
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 571
- Последняя страница: 595
- Аннотация: To estimate parameters of ground motion in future strong earthquakes, characteristics of radiation and propagation of seismic waves in Kamchatka region are studied. Regional parameters of radiation and propagation of seismic waves are estimated by comparing simulations of earthquake records with data recorded by stations of strong motion network of Kamchatka. Acceleration time histories of strong earthquakes (Mw=6.8-7.5, depths 45-55 km) occurred near the eastern coast of Kamchatka in 1992-1993 are simulated at rock and soil stations located at epicentral distances of 67- 195 km. In these calculations the source spectra and the estimates of frequencydependent attenuation and geometrical spreading obtained earlier for Kamchatka were used. The local seismic-wave amplification was estimated based on shallow geophysical site investigations and deep crustal seismic explorations; and parameters defining the shapes of the waveforms, the duration, etc. were selected, which show the best-fit to the observations. The estimated parameters of radiation and propagation of seismic waves describe all the studied earthquakes well. Based on the waveforms of the acceleration time histories, models of slip distribution over the fault planes were constructed for the studied earthquakes. Station PET can be considered as a reference rock station having the minimum site effects. The intensity of ground motion at the other studied stations is higher than at PET due to the soil response or other effects, primarily, topographic ones. At soil stations INS, AER, and DCH the parameters of soil profiles (homogeneous pyroclastic deposits) are estimated, and nonlinear models of their behavior in the strong motion are constructed. The obtained parameters of radiation and propagation of seismic waves and models of soil behavior can be used for forecasting ground motion in future strong earthquakes in Kamchatka.
- Добавил в систему: Павленко Ольга Витальевна