On the possible amplification of nonlinear seismic waves

Details On the possible amplification of nonlinear seismic waves On the possible amplification of nonlinear seismic waves

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pepi...50...39e&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 50, Issue 1, p. 39-45.

Physics

6

Scientific paper

The dilaton mechanism is used in describing the propagation of seismic waves. According to Zhurkov, dilatons are short-lived microdynamical density fluctuations which can absorb or radiate energy. Low-intensity waves give a part of their energy away to dilatons, which results in attenuation of the propagating waves. High-intensity waves cause the dilatons to break up and the energy of dilatons is transferred to the propagating wave, which causes amplification. A model evolution equation for long SH-waves is derived. This equation contains an additional body force, beside the dispersive and nonlinear terms, which models the dilaton mechanism. A numerical experiment shows the qualitative correctness of such a model.

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