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The accuracy of traveltime perturbations from isotropic to anisotropic medium
Author(s) -
de Araújo SimõesFilho Ivan
Publication year - 1993
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl00821
Subject(s) - isotropy , anisotropy , perturbation (astronomy) , computation , physics , geology , geophysics , computational physics , mathematical analysis , optics , mathematics , quantum mechanics , algorithm
The accuracy of perturbation methods for traveltime computations in anisotropic media is investigated as a function of the medium deviation from isotropy. The traveltime perturbation equations are briefly reviewed and a method for the choice of the isotropic background is proposed. The perturbed traveltimes are then compared with results of exact ray tracing for four different anisotropic models with orthorhombic symmetry and increasing anisotropy. The accuracy of the perturbed traveltimes is very good for media with small perturbations and decreases rapidly for perturbations larger than 15%.