Seismic Risk Index Based on Main Perils and Exposures

Abstract

The objective of this paper is to propose seismic risk indexes for clarifying seismic risks in each city, district, town, and village in Japan and to contribute to effective managements in disaster resilience. It is crucial to take effective disaster countermeasures based on seismic risks in each region against megathrust earthquakes. The seismic risk indexes proposed in this paper are based on five perils and five exposures, comparing all cities, districts, towns, and villages in Japan. Based on these indexes, we could (1) identify methods for calculating losses in each peril and exposure, (2) create seismic risk maps by calculations, and (3) draw radar charts for seismic risk focusing on two cities and two districts.