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本文对1984年7—8月间在唐山滦县地区的12个观测点上使用PDR—1型数字地震仪进行近场地震观测所得资料初步分析,认为:滦县小区域地震相对密集并与大区域北东向的地震分布不同,震中呈北西向分布并指向7.1级地震震中。人工地震测深资料推断的唐山断裂Ⅰ对唐山地区地震的发生有一定的制约作用,而滦县—乐亭断裂可能为一垂直断裂,它可能控制着滦县小区域的小震活动。
In this paper, a preliminary analysis of the data obtained from near-field seismic observation using PDR-1 digital seismograph at 12 observation points in Luanxian, Tangshan from July to August in 1984 shows that the earthquakes in Luanxian small area are relatively dense and large The distribution of earthquakes in the NE direction of the area is different. The epicenter shows a NW distribution and points to the epicenter of the 7.1 magnitude earthquake. The Tangshan fault Ⅰ deduced from the artificial seismic sounding data has a certain restrictive effect on the occurrence of earthquakes in Tangshan. The Luanxian-Laoting fault may be a vertical fault, which may control the small earthquakes in Luanxian area.