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Characteristics of high-frequency attenuation in the Dead Sea basinстатья
- Авторы: Meirova T., Hofstetter A., Eppelbaum L.V.
- Журнал: Journal of Seismology
- Том: 24
- Номер: No. 3
- Год издания: 2020
- Издательство: Springer Nature
- Местоположение издательства: Switzerland
- Первая страница: 479
- Последняя страница: 494
- DOI: 10.1007/s10950-020-09927-2
- Аннотация: In this study, we derive the characteristics of high-frequency attenuation and excitation of ground motion for the Dead Sea Basin (DSB) area by regressing the peak amplitudes of narrowband-filtered velocity seismograms measured around the shear wave arrivals. We analyzed about 2000 seismograms from 43 local earthquakes in the magnitude range of MW = 0.9–4.5 that occurred in and around the DSB. The regional crustal attenuation is modeled with a frequency-independent piece-wise continuous linear geometrical spreading function and a frequency-dependent quality parameter Q. Our analysis exhibits that S wave attenuation in the DSB has irregular behavior with the effects of arrivals of supercritical reflections. For distances r ≤ 20 km, the geometrical spreading is 1/r; for distances r ≥ 40 km, the geometric attenuation is r −0.4; and for distances 20 < r <40 km, it is r −0.5. The quality parameter Q is modeled as Q = 68f^{0.5}.
- Добавил в систему: Лев Виленович Эппельбаум