Monte-Carlo simulation of record envelope of a near earthquake

Details Monte-Carlo simulation of record envelope of a near earthquake Monte-Carlo simulation of record envelope of a near earthquake

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pepi...49...30g&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 49, Issue 1-2, p. 30-36.

Physics

35

Scientific paper

It is difficult to calculate analytically envelopes of scattered seismic waves from a near earthquake for a simple and important model of multiple anisotropic scattering in homogeneously scattering space. Monte-Carlo simulation was carried out for the acoustic case; as a first approximation its results can be used to describe S waves and coda of a near earthquake.
By means of simulation we can imitate the following features of real envelopes: (1) lack of short initial S-pulse with `source' duration at dimensionless distances ρ >= 1; (2) amplitude attenuation of S waves that is considerably more rapid than the inverse distance law. The result agrees well with the diffusion model; therefore we can suggest a universal asymptotic coda shape function.

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