关键词: 活断层, 运动区段, 强霞活动序列, 跨断层大地测量, 活动时间不同步

Abstract: Fault motion has complicate and variable pattern and a segment of a giant fault zone is usually an unit of jupture.Individual fault segment has its own feature,such as segment length and displacement amount produced during faulting,and position of the actual segment of the fault often changes regularly with time.In order to meet the needs for major engineering projects and strong earthquake prediction,it is necessary to determine which segment of fault zone is active.We propose in this paper that recent activity along a fault zone can be directly identified based on activity sequence of the strong earthquake and multiplesurvey on the geodetic network across the fault zone,and then the active segment can be determined in combination with geomorphic feature and variation of ground water level.

Key words: Active fault, Segmentation of fault movement, Sequence of strong earthquake, Geodetic survey across a fault, Non-synchronous activity