The development of Great Earthquake Risk Assessment System based on high resolution grid data

The Great Earthquake Risk Assessment System (GERAS for Windows) is developed specially for the great earthquake risk assessment applied in the North-South Seismic Zone (NSSZ) of China. The system is based on GIS and database with gridding data in NSSZ. It has main functions of database management, the tools for data gridding, life loss estimation based on the gridding population, the economic losses estimation based on the gridding building distribution, the synthetic risk assessment considering the possibility of risks caused by both the ground seismic motion and the fault rupture, the disaster mapping and geological information processing. The system can be applied to assess risk of the potential great earthquake and fast estimate the loss immediately after the great earthquake occurrence etc. The design idea and main functions of the system is introduced in the paper.