System Development for Prompt Estimation and Updating of Seismic Intensity Map in the High-Precision and Density in the aftermach of Earthquake Occurrence

对于地震发生后经过验证的第一次救援框架来说，有关有关地区地震灾害的信息是必不可少的。具有可更新功能的地震灾害分布评估系统的开发显得尤为重要。本研究项目旨在开发基于JMA地震台站地震烈度和相关地区土壤剖面数据库的详细地震烈度图快速估算系统。主要研究成果如下：(1)东海地区土壤剖面数据库的建立东海地区6个县的地表地质土壤剖面模型。剖面模型分布在6个地州的约17万个等距网格(约500m×500m)上。(2)详细地震烈度图快速估算系统利用强震记录，对短周期强震预报技术和断裂面粗糙度分布反演技术进行了系统化。在此基础上，开发了详细的地震烈度图快速估算系统。(3)液化势图估算技术研究开发了相关地区的液化势分布估算系统。讨论了地震动时程对液化的影响，并将结果引入到系统中。

For a validated first framework of rescue just after the earthquake occurrence, the information on seismic disaster over the concerned area is indispensable. The development of the estimation system which includes the renewable function for seismic disaster distribution is especially significant. This research project is aimed to develop the prompt estimation system for a detailed seismic intensity map on the basis of the JMA seismic intensity of the observation stations as well as the soil profile database over the concerned area.Major results of the research project may be summarized as in the following.(1) Development of the database for soil profiles for Tokai regionThe soil profile models of surface geology for 6 prefectures in Tokai region has been organized. The profile models are allocated to about 170,000 meshes which are equally spaced (about 500m x 500m) in 6 prefectures.(2) Prompt estimation system for detailed seismic intensity mapThe prediction technique for short-period strong motion and the inversion technique of asperity distribution on fault plane using the strong motion records have been systemaized. On the basis of these techniques, the prompt estimation system for detailed seismic intensity map has been developed.(3) Estimation technique of liquefation potential mapThe system which can estimate the liquefaction potential distribution for concerned area has been developed. The effect of ground motion duration on the liquefaction has been discussed, and the results were innovated into the system.