The Numerical Simulation Software for Large Scale Earthquakes Based on FrontISTR

Software EduS/FrontISTR has been developed for the numerical simulation of crustal deformation and seismic wave propagation using the parallel platform of FrontISTR. The parallel computing of finite element method and fault model were adopted in the software for the numerical simulation of large scale earthquakes. The computed results are well agreed with theoretical results or observations. Taking the Pacific Ocean offshore earthquake in Northeast Japan as an example, a numerical simulation of large scale earthquake has been carried out by EduS/FrontISTR based on the Japan Seismic Hazard Information Station (J-SHIS) and the seismic wave velocity model of Matsubara. The phenomenon of the concentrated strain in the Niigata-Kobe Tectonic Zone (NKTZ) of northeastern Japan is well reproduced by the computed results and the seismic wave propagation is also well reproduced by the simulated digital database of 3D seismic velocity. These results are good agreement with the observation. Therefore, seismic wave data can be obtained by the computational software EduS/FrontISTR. This will be well suitable for safety assessment of the engineering structures after the earthquake.