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1984年11月27日山西天镇发生4.5、4.2(M_L)地震各一次,震区曾在1673年发生过5.5级、1978年发生过4.5级地震.笔者综述了这次地震发生的大区域地震活动背景,详细介绍了震害和烈度考察情况,极震区为Ⅴ度,人感强烈、少量二类房屋出现裂缝.地震前出现地下水异常和数起动物异常.通过对震区的地震地质分析,认为这次地震的发震构造为一组北西向断层,并预测了本区未来可能的地震活动水平.
On April 27, 1984, the 4.5 and 4.2 (M_L) earthquakes occurred in Tianzhen, Shanxi Province, respectively. The earthquake area occurred in 5.54 in 1673 and the 4.5 magnitude earthquake occurred in 1978. The author summarizes the large-scale earthquakes Background of the earthquake, detailed description of the investigation of earthquake damage and intensity, the degree of extreme earthquake zone being Ⅴ degree, a strong sense of human presence, and the emergence of cracks in a small amount of type II houses. Before the earthquake, groundwater anomalies and several animal anomalies occurred. , The seismogenic structure of this earthquake is thought to be a group of NW faults and predict the possible level of seismic activity in the future.