Joint inversion of Love-wave dispersion curves and SH-wave firstarrivals for near-surface SH-wave velocity

Abstract

Abstract-Tomography and surface-wave analysis are two established methods in seismic surveys and used successfully in near surface. Data acquisition, processing, and inversion of those two methods have been studied widely. Those two methods possess some different particular advantages respectively. We implemented the joint inversion of Love-wave dispersion curves and SH-wave first arrivals using a damped least-squares algorithm to obtain subsurface SH-wave velocity models. The joint inversion method is tested with two synthetic seismic records. We compared results of those two individual inversion methods with those of the joint inversion method. The results indicate that we could use the joint inversion method to achieve a better real SH-wave velocity model because the joint inversion uses more data for SH-wave velocities in inversion. The results also indicate SH-wave velocities of low velocity layers could also be determined using the joint inversion method.