Abstract
In this study, by means of simulation of strong ground motions based on the pseudo point-source model, which is one of the source models for strong ground motions during the 2011 off the Pacific coast of Tohoku earthquake, we investigate the degree of agreement between the observed and synthetic Fourier spectra in the Kanto Region. The results indicate that, to achieve good agreement between the observed and synthetic Fourier spectra, careful consideration of the path effect is required. We used a revised path model in which following two effects are considered: (1) the geometrical spreading term inversely proportional to the square root of the distance at large distances, (2) the lower bound of the Q value at lower frequencies. By using a revised path model with these effects, a good agreement was achieved between the observed and synthetic Fourier spectra in the Kanto Region.
