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本文利用晋冀鲁豫交界地区大量小地震的综合断层面解,对本区地震构造和地震活动关系进行了研究后提出:自1976年唐山大震后,该区小地震的综合断层面解的主压应力轴发生了转向,由近东西向转为近南北向,与华北地区强震发生的统一应力场不一致。对该区北西向的发震构造产生右旋滑动,而对应力积累起缓冲作用,从而使近年内,本区发生强震的可能性不大。但有可能存在中强地震活动。
In this paper, the comprehensive fault surface solution of a large number of small earthquakes in the junction area of Shanxi, Shandong and Henan provinces is used to study the relationship between the seismic structure and seismic activity in this area. After the Tangshan earthquake in 1976, The compressive stress axis changed direction from near east-west to near-north-south direction, which was inconsistent with the unified stress field in strong earthquakes in North China. Right-lateral slip occurs to the NE-trending seismogenic structure of this area, and the stress accumulates to buffer, so that there is not much possibility of strong earthquakes in this area in recent years. However, there may be strong earthquake activity.