China Medium- and Long-Term Earthquake Hazard Assessment Database and Its Development

The China Medium- and Long-term Earthquake Hazard Assessment Database (CMLEHAD) has been established by sorting and summarizing various datasets related to the assessment of earthquake hazard areas in the Chinese mainland. It integrates five key datasets: Seismic Geology, Geodesy, Seismology, Numerical Simulation, and Fundamental Model, providing comprehensive data for long-term and medium-term earthquake hazard analysis and other relevant studies. The data supports the analysis of the fault segments with seismic gap, motion strongly locked, sparse small–moderate earthquakes, and apparent Coulomb stress increase. In system architecture, the CMLEHAD is divided into three layers: data layer, service layer and application layer. It is designed for interactive display through Web and Geographic Information System (GIS) platforms. The data acquisition and method in the database have been widely recognized and used in the corresponding field. The database is continuously updated and maintained through collaboration between provincial earthquake agencies, research institutes, and technical experts to ensure its accuracy and relevance. Currently, the database provides tailored data sharing services to multiple provincial earthquake agencies and immediate centers, granting them access permissions and specific datasets according to their needs. The future work will focus on improving the database’s functionality by incorporating advanced models and automated data services, thereby consolidating the data foundation and serving the purpose of earthquake disaster mitigation.