Evaluation of Site Amplifications in the Survey of District-based Vulnerability to Earthquake Disaster Performed by Tokyo Metropolitan Government

Abstract

In the survey of district-based vulnerability to earthquake disaster performed by the bureau of urban development, Tokyo Metropolitan Government in 2008, the site amplifications were defined for 10 soil classes. The bureau of urban development revised the soil classes in 2011 and the number of soil classes is 12 at this moment. Therefore, the site amplifications with respect to the soil classes are also reevaluated in Tokyo Metropolis. In this study, the site amplification characteristics in Tokyo Metropolis are evaluated using the recent seismic records observed in SUPREME network and the spatial geomorphologic dataset developed by Wakamatsu et al. and that by Tokyo Gas Co., Ltd.