Inversion for Radial Anisotropic Velocity Model Using Surface Wave Group Velocity Dispersion

Gonnabattula, Siddartha (2016) Inversion for Radial Anisotropic Velocity Model Using Surface Wave Group Velocity Dispersion. Masters thesis, Indian Institute of Science Education and Research Kolkata.

PDF (MS dissertation of Siddartha Gonnabattula (09MS088)) Siddartha_G-09MS088.pdf - Submitted Version Restricted to Repository staff only Download (1MB)

Abstract

Relative SV and SH wave speeds are generally attributed to radial seismic anisotropy. For the purposes of this study, we will use a transversely isotropic media to model the observed Rayleigh and Love wave pure-path group velocities and calculate the velocity model of the assumed transversely anisotropic medium, the computed velocities are representative of azimuthally averaged values. Using this we can get a better understanding about the structure of the earth in the upper mantle. The upper mantle down to 220km depth is characterized by a significant degree of transverse isotropy. The depth extent and magnitude of radial anisotropy can be explained by an upper mantle which contains olivine with preferred orientations under pacific.

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