Scattering and attenuation of high-frequency body waves (1–25 Hz) in the lithosphere |
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| Authors: | Keiiti Aki |
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| Institution: | Department of Earth and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139 U.S.A. |
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| Abstract: | A strong frequency dependence of apparent Qβ?1 of shear waves was found for the frequency range from 1 to 25 Hz using band-pass filtered records of about 900 earthquakes occurring in the central Japan area with focal depths from 0 to 150 km. The method used for estimating Qβ is a single-station method based on elimination of the source effect from S waves by the use of coda spectra. The validity of the method is confirmed by agreement between the results obtained independently using data from two stations in the same area. |
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