对1989年以来华北北部6级左右地震前山西测震及前兆异常的总结

Summarization on Anomalies of Seismicity and Precursor in Shanxi before about M6.0 Earthquakes of Northern Part of North China since 1989

从山西测震，前兆资料入手，在核实异常的基础上，总结了１９８９年以来华北北部４次６级左右地震前的异常，对各次地震前测震和前兆的异常类型，形态，空间分布等特征进行了综合分析并对这些观测项目的映时震能力进行了评价。

Based on the verification for the anomalies of the seismological and precursory data in Shanxi,the anomalies before the 4 earthquakes with magnitude about 6.0 in the northern part of North China since 1989 were summarized,the characterstics of the type, the shape and the spatial distribution of the seismological and precursory anomalies before the earthquakes were comprehensively analyzed,and the reflecting earthquake ability of the observation items was preliminarily tested and evaluated.