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| | Abstract | | The final step in the analysis of surface wave exploration and microtremor array survey is to estimate the S-wave velocity distribution by inversion of the observed phase velocities. The observed phase velocities are usually assumed to be that of the fundamental mode. However, in general, multimode surface waves exist in the observation records, and the observation phase velocities may be apparent phase velocities. Therefore, it is desirable to perform the inversion by considering that the observed phase velocities are the apparent phase velocities without making the assumption that the fundamental mode is dominant. In this paper, apparent phase velocities of Rayleigh and Love waves are computed for several underground structural models. Then, S-wave velocity distribution is obtained by inversion, and these results are considered. |
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