Abstract
For the purpose of the ground motion estimation at a very near site from a fault, we prepared the theoretical simulation method based on the Green's function formula for uniform elastic fullspace, and evaluated integral error of the simulated theoretical ground motion at a very near site from a fault. As a result, the element size for integral had to be less than half of the distance between the element and the site. And, the effective element division was suggested for the fault which outcroped to the ground surface. Furthermore, the theoretical motion was simulated numerically at a very near site from a fault, in the case that the strong ground motion generated from the surface area, which lay from the seismogenic upper limit to the surface. Under consideration for ground motion generation from the surface area, it was illustrated that the predicted maximum velocity (in average) and maximum acceleration (in average) were about 1.5 times for without consideration of the surface area when hypocenter located the bottom right of the SMGA.
