Quantification of the crust and mantle heterogeneity and construction of a simulation model for broadband strong ground motions

点击翻译按钮获取中文摘要

In this study we quantified the crust and mantle heterogeneity, and constructed a broadband strong ground motion simulation model. The distribution characteristic of the small-scale heterogeneities of the scale several kilometers or less in the subsurface structure is evaluated based the analysis of regional seismograms obtained by the Hi-net high-density seismic network from two points : 1) frequency dependency and the distance dependence of collapse of the apparent S-wave radiation pattern and 2) relative strength of the P-wave amplitude in the Transverse component. We developped a high-performance broadband simulation model and large scale simulation was conducted using the Earth Simulator supercomputer.