【摘要】 首先给出了分解到已知断层面法向和切向上的断层错动科里奥利应力(简称为科里奥利法向应力和切向应力)表达式,然后从哈佛大学矩心矩张量目录中选取主余震资料进行分析,按断层分类研究了科里奥利法向应力和主震震级与其最大余震震级差及主震地震矩与余震地震矩总和之差的折合矩震级间的关系。研究结果显示:地震断层错动过程中虽然产生了使断层两盘相互拉离(或挤压)的科里奥利法向应力,它降低(或增加)了断层错动时断层面上的摩擦阻力,但是应力量值太小(科里奥利法向应力估计最大不到0.1MPa,即不到一个大气压),不足以对断层错动及主震能量释放产生影响,从而影响余震的最大震级和总体水平。更多还原

【Abstract】 The study first gives the expression for the normal component of fault movement Coriolis stress(normal Coriolis stress for short) to a certain fault plane,and then select the data of mainshock and aftershock from Harvard CMT catalog.Classification study on the normal Coriolis stress is carried out according to the fault types,and the relations between the normal Coriolis stress and the magnitude difference of mainshock and its maximum aftershock,and the converting moment magnitude of the difference of mainshock’s moment tensor and the sum of total aftershocks’ moment tensor are studied respectively.The results show that tensile(or compression) normal Coriolis stress is generated during the fault slip,which decreases(or increases) the frictional resistance of fault movement.However,the normal Coriolis stress was too small(maximum normal Coriolis stress is not exceeding 0.1MPa,namely not exceed one atmospheric pressure) to affect the fault slip and the energy release of mainshock,and affects the aftershock activity and maximum magnitude of aftershocks.更多还原