FUNDAMENTAL RESEARCH FOR IMPROVING FAULT SCENARIO -DEVELOPMENT OF A METHOD FOR CRUSTAL DEFORMATION ANALYSIS USING HIGH-FIDELITY THREE-DIMENSIONAL CRUSTAL STRUCTURE MODEL-

Abstract

 Assessment of earthquake damage is expected to be improved by appropriate setting of the scenario fault rupture. Estimation of interplate coupling, using large-scale analyses of the observed crustal deformation data based on detailed data of crustal structure, could be one way to improve it. However, it has not been achieved because of the difficulty of generating high-fidelity numerical models of crustal structure for numerical analyses and the computational cost. In this research, by using the techniques of high performance computing, we developed a method for generating a high-fidelity three-dimensional crustal structure finite element model, and a method for crustal deformation analysis using the generated model. The crustal deformation analyses in Southwest Japan show the significant difference between the results of our method and conventional method. These analyses indicate that there is a significant difference in estimation results of interplate coupling, if high-fidelity models as shown in this paper are not used.