Evaluation of characteristics of spatial variation of ground motion at adjacent points based on scattering theory

The relational equation of the inhomogeneity of the subsurface soil and the propagation distance of the ground motion with the spatial variation of the ground motion between adjacent points is constructed based on the scattering theory. By applying the relational equation to the response wave of the seismic simulation using the three-dimensional heterogeneous soil model and the observation records on the Chiba array, heterogeneous parameters of subsurface soil and the depth 𝐿c which affects the spatial variation of the seismic motion were estimated.