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本文讨论了与1830年磁县7.5级地震有关的下列问题:1、区域构造环境,指出太行山山前断裂带南部被隐伏的北西西向构造带阻隔,形成应力集中区,构成磁县7.5级地震的区域构造条件;2、根据地质构造、震源机制、地壳应力测量资料,讨论了华北平原地区的北东东(近东西)向挤压应力场;3、介绍了朝城—大名—磁县—涉县隐伏断裂的地质构造和地震活动特征;4、磁县7.5级地震的前震活动,发震一年之前5个5级地震形成包围圈;5、磁县7.5级地震的极震区等震线为北西西向,与同向隐伏断裂的展布相吻合.
This paper discusses the following issues related to the 1830 Cx7 earthquake: 1. The tectonic setting of the region indicates that the southern part of the Taihangshan piedmont fault zone was obstructed by the hidden North West-West structural belt and formed a stress concentration zone, Regional tectonic conditions; 2. According to geological structure, focal mechanism and crustal stress measurement data, the crustal compressional stress field in North China Plain (near east-west crust) is discussed; (3) Geological structure and seismic activity characteristics of hidden faults in the county; 4. Pre-seismic activity of MS7.0 earthquake in Cixian County, forming enclaves of 5 MS5 earthquakes one year before the earthquake; Northwest-west, coinciding with the distribution of concealed faults in the same direction.