[SSS10-P14] 2 D Wave propagation using the Finite Difference Method
キーワード：SH wave, PML, Finite difference
Earthquake ground motion can be affected by a number of factors such as anisotropy topography and soil sediments, scattering, and diffraction. Geological structure such as fold and faults directly affect seismic wave propagation due to scattering or diffraction. It is considered at the interface of having different acoustic impedance P wave converted into P and SV and S wave converted into SV and SH wave. SH wave have the tendency to amplify the earthquake so it is required to model the SH wave. In the present study SH wave is modeled using the finite difference method on staggered grid. In this method space time grid covers the domain of the computation. In the present study uniform grid is designed to solve the problem as simple as. Finite difference scheme given by Virieux (1984) is used to modeled the SH wave. Velocity and stress are used at the discrete grid point. A simple model is used for a homogenous sedimentary layered structure. For the velocity and density prior information is used. Staggered finite difference has the high order precision. Perfectly matched layer(PML) also considered in the present work.