Physics
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pepi...51...36f&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 51, Issue 1-3, p. 36-41.
Physics
Scientific paper
The Earth is generally as inhomogeneous as it is anisotropic. Nevertheless, one often comes across interpretations based on the assumption that the Earth is inhomogeneous and isotropic, or that the Earth is homogeneous and anisotropic. The present paper attempts to shed some light on the problem of model-type selection by using the linearization approach to compute the travel times in 2-D inhomogeneous and slightly anisotropic media. A computer program was developed for such media, with the linearization approach applied only to the anisotropic part. Some numerical results usable for typical Dss of models are presented. These are used to demonstrate how the effects of anisotropy and those of inhomogeneity influence the resulting travel times (1-D isotropic model, 1-D anisotropic model, 2-D inhomogeneous isotropic model, and 2-D inhomogeneous anisotropic model). Estimating their extent in realistic (but model) situations should help to distinguish the effects of inhomogeneity from those of anisotropy in practice.
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