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Yakutian Mathematical Journal, 2015, Volume 22, Issue 2, Pages 92–105 (Mi svfu64)

Mathematical modeling

Mathematical modeling of acoustic-gravity and seismic waves propagation for a heterogeneous earth-atmosphere model in a wind-stratified atmosphere

A. A. Mikhailov, V. N. Martynov

Institute of Computational Mathematics and Mathematical Geophysics of Siberian Branch of Russian Academy of Sciences, Novosibirsk

Abstract: A numerical-analytical algorithm for seismic and acoustic-gravity waves propagation is applied to a heterogeneous «Earth-Atmosphere» model. Seismic wave propagation in an elastic half-space is described by a system of first-order dynamic equations of elasticity theory. The propagation of acoustic-gravity waves in the atmosphere is described by the linearized Navier-Stokes equations with the wind. The algorithm is based on the integral Laguerre transform with respect to time, the finite integral Fourier transform with respect to a spatial coordinate combined with a finite difference method for the reduced problem. The algorithm is numerically tested for the heterogeneous Earth-Atmosphere model for different source locations.

Keywords: Navier-Stokes equations, Laguerre transform, finite difference method, seismic waves, acoustic-gravity waves.

UDC: 517.956.3

Received: 10.09.2015



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