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张北 6 .2级地震现场调查结果表明 ,这次地震形成了大量的非构造地裂缝 ,它们主要分布在极震区和 度区。地裂缝的优势方位为 NNE和 NWW向 ,与 度等震线双向展布基本一致。利用地裂缝的空间分布特征和统计的优势方位 ,探讨了地裂缝与烈度分区和发震构造的关系。
According to the field investigation of the Zhangbei MS6.2 earthquake, a large number of non-structural ground fissures were formed in this earthquake, which are mainly distributed in the extreme earthquake zone and the degree zone. The dominant directions of ground fissures are NNE and NWW directions, which are basically the same as those of isocene equiaxed lines. Based on the spatial distribution characteristics of ground fissures and the predominant azimuths of statistics, the relationship between ground fissures and seismic subregions and seismogenic structures is discussed.