2-D seismic wave propagation using the distributional finite-difference method: further developments and potential for global seismology

Masson, Yder; Lyu, Chao; Moczo, Peter; Capdeville, Yann; Romanowicz, Barbara; Virieux, Jean

doi:10.1093/gji/ggae025

2-D seismic wave propagation using the distributional finite-difference method: further developments and potential for global seismology

Journal Article · Wed Jan 17 23:00:00 EST 2024 · Geophysical Journal International

DOI:https://doi.org/10.1093/gji/ggae025· OSTI ID:2308869

; ; ; ; Romanowicz, Barbara; Virieux, Jean

SUMMARY

We present a time-domain distributional finite-difference scheme based on the Lebedev staggered grid for the numerical simulation of wave propagation in acoustic and elastic media. The central aspect of the proposed method is the representation of the stresses and displacements with different sets of B-splines functions organized according to the staggered grid. The distributional finite-difference approach allows domain-decomposition, heterogeneity of the medium, curvilinear mesh, anisotropy, non-conformal interfaces, discontinuous grid and fluid–solid interfaces. Numerical examples show that the proposed scheme is suitable to model wave propagation through the Earth, where sharp interfaces separate large, relatively homogeneous layers. A few domains or elements are sufficient to represent the Earth’s internal structure without relying on advanced meshing techniques. We compare seismograms obtained with the proposed scheme and the spectral element method, and we show that our approach offers superior accuracy, reduced memory usage, and comparable efficiency.

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Sponsoring Organization:: USDOE

OSTI ID:: 2308869

Alternate ID(s):: OSTI ID: 2582324

Journal Information:: Geophysical Journal International, Journal Name: Geophysical Journal International Journal Issue: 1 Vol. 237; ISSN 0956-540X

Publisher:: Oxford University PressCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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