Publication Name: AEGC 2021
Authors: Mehdi Tork Qashqai, Erdinc Saygin
Date Published: September 2021
Number of Pages: 6
Abstract:
Traveltimes of P and mode-converted S-waves and their reverberations place a tight constraint on the Vp/Vs ratio and their amplitude ratio provides tight bounds on the P and S wave velocity jumps across the main discontinuities in the subsurface structure below a seismic receiver. Seismic P-to-S converted waves have been used for decades to estimate the shear-wave velocity of the subsurface and depths of major discontinuities below a seismic receiver through a method known as the P wave receiver functions. Here, a new and alternative approach is presented using P and all mode-converted shear waves in a probabilistic joint inversion framework to simultaneously estimate seismic properties of the crust (Vp, Vs, and Vp/Vs).