华北地区定点台站形变资料分析

ANALYSIS OF DEFORMATION DATA FROM FIXED-STATION IN NORTH CHINA

对华北地区定点台站形变观测资料,采用傅立叶去年周期和线性拟合的方法进行处理。结果表明,华北地区现阶段的变化未形成主体异常时段,反映出断层未进入强烈活动阶段;首都圈地区跨断层资料异常数量不多,没有形成同步异常,异常变化幅值也不是很大,中短临地震异常不明显。

This paper analyzes deformation data from the fixed-stations in North China, and 61 mobile measuring lines in Capital Circle area （short leveling , short baseline）, and the cut-off time for all the data is August, 20ll. The methods of Fourier Transform removing annual cycle and linear fitting are used for processing the data. The results suggest, at present stage, the changes in North China do not form the principal anomaly, which reflects that the faults do not come into the stage of strong activity. The anomaly quantity of the crossing fault data in Cap- ital Circle area is a little, and not synchronous, also the amplitude of abnormal variation is not large,the variation morphology of several abnormal curves is not significant, so there probably does not exist the medium-short-impend- ing anomaly to some extent.