运用实验结果及断裂理论分析研究1996年丽江7级地震孕震过程  

Using Experimental Result and Fault Theory to Analyze and Study the Seismogenic Process of the Lijiang M7.0 Earthquake in 1996

作　　者：胡毅力[1] 文丽敏[1] 吴小平[1] 王万里[1] 杨润海[2] 

机构地区：[1]云南大学地球物理系,昆明650091 [2]云南省地震局,昆明650041

出　　处：《地震研究》2005年第1期43-48,共6页Journal of Seismological Research

基　　金：云南大学科研基金项目(2002T005ZH)资助.

摘　　要：通过追踪1996年丽江7级地震的孕震过程,发现其震前30余年前兆性中强地震的发生顺序和迁移特征与前人实验结果相吻合。从断裂理论分析,中强震前兆性地震序列及主震发生的先后顺序由孕震区内断裂构造及断裂端部应力核区内介质的E·γ综合决定。这种运用实验结果和相关理论来分析和研究某些天然地震孕震过程的方式,有可能为地震研究和地震预报尝试一条新途径。When tracing the seismogenic process of the Lijiang M7.0 earthquake in 1996, it is found that the occurrence order of precursory medium-strong earthquakes 30 years before the shock and their migration feature accord with the predecessors' study result. From the angle of fault theory, the occurrence order of precursory medium-strong earthquakes and the mainshock is decided comprehensively by the fault structures in the seismogenic area and E·γ of the medium in the stress core area at the tops of faults. This research method applying the experiment result and relative theory to some nature earthquakes is possible to be a new way to earthquake study and prediction.

关 键 词：地震孕育 地震活动 发震顺序 应(形)变场 丽江地震 

分 类 号：P315.1[天文地球—地震学]