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根据对首都圈７５项断层形变监测资料的多年分析提出，在地壳形变的失稳阶段的断层形变异常主要有两种表现形式：一是持续１～２年或更长时间的中期形态变化；二是尺度为１～３个月的快速形变事件．上述两类变化当以群体变化形式出现时，可能与华北地区的强震活动有关．本文用信息合成的方法提取单项断层形变的共性特征，并探讨其与地震孕育的关系
According to the multi-year analysis of 75 fault monitoring data in the metropolitan area, it is suggested that there are mainly two kinds of fault deformation anomaly in the unstable phase of crustal deformation: one is the mid-term morphological change lasting 1-2 years or more; Is the scale of 1 to 3 months of rapid deformation event. When these two types of changes occur as a group change, they may be related to strong earthquakes in North China. In this paper, we use the method of information synthesis to extract the common features of single fault deformation and discuss the relationship with the earthquake