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本文根据1976年唐山7.8级地震前后的水准复测资料,研究了这次地震前后大面积地壳垂直形变的特点。结果表明,在震前震中区地壳运动有一个长期缓慢运动—活跃—“平静”—发震的过程。地震前后的地形变资料表明,地壳形变与地质构造有密切的关系,震后形变与以往强烈地震的震后形变具有某些共同的特点。
Based on the data of horizontal retest before and after the MS7.8 Tangshan earthquake in 1976, this paper studies the characteristics of vertical crustal deformation before and after this earthquake. The results show that the crustal movement in the epicenter before the earthquake has a long-term slow movement - active - “calm” - the process of earthquake. The deformation data before and after the earthquake show that the crustal deformation is closely related to the geological structure. The post-earthquake deformation has some characteristics in common with those of the past strong earthquakes.