About: Comparison of the Anisotropic-common-ray approximation of the Coupling ray theory for S waves with Fourier pseudo-spectral method in weakly anisotropic models

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About: Comparison of the Anisotropic-common-ray approximation of the Coupling ray theory for S waves with Fourier pseudo-spectral method in weakly anisotropic models Goto Sponge NotDistinct Permalink

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Description	The standard anisotropic ray theory does not work properly or even fails when applied to S-wave propagation in inhomogeneous weakly anisotropic media or in the vicinity of shear-wave singularities, where the two shear waves propagate with similar phase velocities. The coupling ray theory was proposed to avoid this problem. In it, amplitudes of the two S waves are computed by solving two coupled, frequency-dependent differential equations along a common S-wave reference ray. In this paper, we test two recently developed algorithms of the coupling ray theory. As a reference, we use the Fourier pseudo-spectral method, which does not suffer from limitations of the ray method and yields very accurate results. We study the behavior of shear waves in weakly anisotropic media as well as in the vicinity of intersection or conical singularity. The standard anisotropic ray theory does not work properly or even fails when applied to S-wave propagation in inhomogeneous weakly anisotropic media or in the vicinity of shear-wave singularities, where the two shear waves propagate with similar phase velocities. The coupling ray theory was proposed to avoid this problem. In it, amplitudes of the two S waves are computed by solving two coupled, frequency-dependent differential equations along a common S-wave reference ray. In this paper, we test two recently developed algorithms of the coupling ray theory. As a reference, we use the Fourier pseudo-spectral method, which does not suffer from limitations of the ray method and yields very accurate results. We study the behavior of shear waves in weakly anisotropic media as well as in the vicinity of intersection or conical singularity. (en)
Title	Comparison of the Anisotropic-common-ray approximation of the Coupling ray theory for S waves with Fourier pseudo-spectral method in weakly anisotropic models Comparison of the Anisotropic-common-ray approximation of the Coupling ray theory for S waves with Fourier pseudo-spectral method in weakly anisotropic models (en)
skos:prefLabel	Comparison of the Anisotropic-common-ray approximation of the Coupling ray theory for S waves with Fourier pseudo-spectral method in weakly anisotropic models Comparison of the Anisotropic-common-ray approximation of the Coupling ray theory for S waves with Fourier pseudo-spectral method in weakly anisotropic models (en)
skos:notation	RIV/67985530:_____/11:00371150!RIV12-AV0-67985530
http://linked.open...avai/predkladatel	Geofyzikální ústav AV ČR, v. v. i.
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GAP210/11/0117), Z(AV0Z30120515)
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Pšenčík, Ivan
http://linked.open.../riv/druhVysledku	O - Ostatní výsledky nezařaditelné do žádného z výše uvedených druhů výsledku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Geofyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	191249
http://linked.open...ai/riv/idVysledku	RIV/67985530:_____/11:00371150
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	seismic anisotropy; coupling ray theory; 3D models (en)
http://linked.open.../riv/klicoveSlovo	3D models coupling ray theory seismic anisotropy
http://linked.open...ontrolniKodProRIV	[56735E47AA5C]
http://linked.open...in/vavai/riv/obor	DC
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Seismic wave propagation in complex structures – perturbation approaches II
http://linked.open...UplatneniVysledku	2011
http://linked.open...iv/tvurceVysledku	Bulant, P. Farra, V. Pšenčík, Ivan Tessmer, E.
http://linked.open...n/vavai/riv/zamer	Study of the internal structure and dynamics of the Earth

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