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JOURNALS // Sibirskii Zhurnal Vychislitel'noi Matematiki // Archive

Sib. Zh. Vychisl. Mat., 2009 Volume 12, Number 3, Pages 341–350 (Mi sjvm27)

Continuation of elastic waves in reverse time

G. M. Tsybul'chik

Institute of Computational Mathematics and Mathematical Geophysics (Computing Center), Siberian Branch of the Russian Academy of Sciences

Abstract: Methods based on the inverse continuation of the oscillation field have received a wide use in the processing of multi-channel seismic prospecting data. Physically, the idea of this approach is clear: a wave field observed on some surface is continued into the medium and backward in time. Mathematically, all continuation algorithms that are used are based on a scalar model of the wave equation describing sufficiently well the wave nature of oscillations of individual types, but not taking into account the vector nature of these oscillations. It is well known that a system of equations of the dynamic elasticity theory (Lame equations) is a more adequate model for the description of seismic oscillations. In this paper, continuation of the field of elastic oscillations in an inhomogeneous isotropic medium is considered.

Key words: seismic waves, inverse problem, field continuation, Lame equations.

UDC: 550.34

Received: 24.12.2008


 English version:
Numerical Analysis and Applications, 2009, 2:3, 272–280

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