Seismic Waves Due to a Shear Fault in a Semi-infinite Medium Part Ii: Moving Source
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چکیده
doubling the corresponding displacements for an infinite medium. The vertical component Uz is much disturbed by the free surface. (2) The SP wave has an appreciable amplitude comparable to that of P wave as pointed out for a point source case by KAWASAKI et al. (1973). Especially in such cases as shallow sources propagate upward, the SP wave becomes a remarkably marked phase. Hence, careful examinations for SP wave are required on analysing the near-field seismograms, especially for shallow focus earthquakes.
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