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
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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.
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.
引文
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[5]李世愚,滕春海,卢振业,等.典型构造微破裂集结的实验研究[J].地震学报,2000,22(3):278-287.
[6]许昭永,杨润海,赵晋明,等.Y形块体交界处多点大破裂的模拟实验研究[J].地球物理学报,2002,45(增刊):214-224.
[7]王绍晋.丽江地震震区应力场[A].见:晏风桐,刘祖荫主编.一九九六年丽江地震[M].北京:地震出版社,1998.
[8]赵建生.断裂力学及断裂物理[M].武汉:华中科技大学出版社,2003.
[2]刘祖荫,苏有锦,秦嘉政,等.20世纪云南地震活动[M].北京:地震出版社,2002.
[3]马瑾,马文涛,马胜利,等.5°拐折构造变形物理场的实验研究与数值模拟[J].地震地质,1995,7(4):318-326.
[4]马瑾,马胜利,刘力强,等.交叉断层的交替活动与块体运动的实验研究[J].地震地质,2000,22(1):65-73.
[5]李世愚,滕春海,卢振业,等.典型构造微破裂集结的实验研究[J].地震学报,2000,22(3):278-287.
[6]许昭永,杨润海,赵晋明,等.Y形块体交界处多点大破裂的模拟实验研究[J].地球物理学报,2002,45(增刊):214-224.
[7]王绍晋.丽江地震震区应力场[A].见:晏风桐,刘祖荫主编.一九九六年丽江地震[M].北京:地震出版社,1998.
[8]赵建生.断裂力学及断裂物理[M].武汉:华中科技大学出版社,2003.
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