DSM complete synthetic seismograms: SH, spherically symmetric, case

Details DSM complete synthetic seismograms: SH, spherically symmetric, case DSM complete synthetic seismograms: SH, spherically symmetric, case

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21..533c&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 7, p. 533-536

Physics

Geophysics

28

Galerkin Method, Isotropic Media, Seismograms, Structural Properties (Geology), Surface Waves, Algorithms, Discontinuity, Geophysics, Toroids, Waveforms

Scientific paper

We present a new technique, based om the Direct Solution Method (DSM) (Geller et al., 1990; Hara et al., 1991; Geller and Ohminato, 1994), for calculating SH (toroidal) synthetic seismograms for spherically symmetric, isotropic, media. No asymptotic approximations are used and the synthetics, which fully include both body and surface waves, can be computed for a broad range of frequencies. Our algorithm accurately handles sources that require discontinuities in the vertically dependent part of the displacement. We use matrix operators that minimize the numerical error of the solutions. An example synthetic profile is presented for a 600km deep source in the IASP91 model for the period range 4-5000s.

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