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1989年10月18日在我国山西省大同县西册田乡与阳高县友宰乡之间发生了一组中强地震群。山西省大同无线遥测台网连续、精确地记录到该震群的大小地震约1200次(截至1995年),对该震群主要地震定位、震源机制和序列特征的研究表明其属上地壳构造震群。根据地震发生背景,地震序列类型和各类前兆地震前后(特别是震后)变化进行的震后预报研究,表明该地震群的发生符合50年代以来山西地震带5级以上地震成组发生的周期性规律,地震前后各类前兆综合对比表明该序列活动基本结束。指出大同—阳高地震群的发生可能是华北地震区一个新活动期的开始
On October 18, 1989, a group of moderate-strong earthquakes occurred between Tianzai Township, Datong County, Shanxi Province, and Youzai Township, Yanggao County, Shanxi Province. Shanxi Datong wireless telemetry network continuously and accurately recorded the size of the earthquake swarm about 1200 times the size of the earthquake (as of 1995), the main seismic location of the earthquake swarm, focal mechanism and sequence characteristics of the study shows that it belongs to the crustal structure group. The post-earthquake prediction study based on the background of the earthquake, the type of the earthquake sequence and the changes of various types of precursory earthquakes (especially after the earthquake) shows that the occurrence of the earthquake group coincides with the period when the group of earthquakes of magnitude 5 or above in the Shanxi Seismic Belt occurred in the 1950s The law of sex, the comprehensive comparison of various precursors before and after the earthquake shows that the sequence of activities basically ended. It is pointed out that the occurrence of the Datong-Yanggao Earthquake may be the beginning of a new activity period in the North China earthquake area