EG39: Modeling of Scholte Wave for Offshore Seismic Survey

In this study, an efficient dynamic response kernel for water-VTI (vertical transverse istotropic) layered half-spaces subjected to vertical impact and explosion sources is developed by using the stiffness matrix method along with the efficient Fourier-Bessel series (FBS) approach. Using this efficient and accurate forward model, we perform a parametric study with a simple water layer over isotropic layered soil to investigate the effects of water depth, source type, and source and receiver locations on different wave characteristics. The results indicate that the source-receiver array should be chosen properly and water P waves should be muted to better estimate the normal modes. Nevertheless, the effects of array elevation and locations can significantly affect the experimental FVS. With our efficient kernel, frequency-velocity spectrum (FVS) inversion based on actual dynamic response can be realized to take into account source types and source-receiver array locations.