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本文对盐沅、宁蒗地震余震序列的空间展布特征和序列延续特征进行了研究。 空间上,由震沅体长轴、震沅机制结果及烈度等值线图确定,两次盐沅、宁蒗地震是在北西20°左右方向上的压应力P作用下形成的一组共轭破裂面。其序列具有震群型的特征,合称“共轭震群型”。并认为,余震序列的应交、频度、b值的延续特征,反映了大震后,应变能由高值向低值的变化过程。
In this paper, the characteristics of spatial distribution and sequence continuation of the aftershock sequences of the Yanyuan and Ninglang earthquakes are studied. Space, from the Yuan Yuan body long axis, Yuan Yuan mechanism results and intensity contour map to determine the two Yan Yuan, Ning Xi earthquake is in the north west about 20 ° direction of the compressive stress P formed by a group of conjugates Rupture surface. Its sequence has the characteristics of swarm-type, collectively referred to as “conjugate swarm.” It is also believed that the characteristics of aftershock sequence should be continuation, frequency and b value, which reflects the process of the strain energy changing from high value to low value after the earthquake.