Anisotropic elastic finite-difference modeling of sources and receivers on Lebedev grids
Open access
Date
2021-02Type
- Journal Article
Abstract
The Lebedev grid finite-difference (FD) method allows modeling of anisotropic elastic wave propagation. On Lebedev grids, erroneous point-source excitations can create spurious (non-physical) waves. The only known remedy for such artifacts in the literature is the Lisitsa-Vishnevsky method. This method uses a distributed array to create both point-sources and point-receivers on the FD grid. However, the Lisitsa-Vishnevsky method does not fully eliminate spurious artifacts. A novel approach is found in the FD-consistent point-source, which suppresses the spurious artifacts entirely. The method requires no array recording to create point-receivers. The advantage of this method over the Lisitsa-Vishnevsky method is demonstrated with two anisotropic modeling examples. © 2021 Society of Exploration Geophysicists. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000461374Publication status
publishedExternal links
Journal / series
GeophysicsVolume
Pages / Article No.
Publisher
Society of Exploration GeophysicistsSubject
Modeling; Finite difference; AnisotropyOrganisational unit
03953 - Robertsson, Johan / Robertsson, Johan
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