关键词: 活断层, 地震活断层, 地震危险性评价, 地震危害性评价

Abstract: The exploration and seismic risk assessment of active faults in 20 capital cities of China will be carried out during the period of the 10^th“Five-Year Plan”. This paper elaborates the essential contents and key points of the technical guiding document for this project,“the Working Guideline for Exploration and Seismic Risk Assessment of Active Faults in Urban Areas (on Trial)”,demonstrating the scientific,commonly applicable,inclusive,operable,and restrictive attributes of the regulation,defining the main objects of the exploration engineering: the active fault and the seismic active fault,explaining the connotation of the working areas and the target areas,as well as the difference of the working method in these two areas,analyzing the three level scientific problems which the project would face and the five steps that should be taken in executing process,and discussing the points of attention in each step and countermeasures that should be taken. This paper emphasizes the necessity of the middle-phase checking during the exploration,and points out that this project is the continuing,developing and deepening of all the earthquake hazard prevention work that has been done before.

Key words: active fault, seismic active fault, seismic risk assessment, seismic hazard assessment