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余震活动机理研究综述
曲均浩,蒋海昆,李金,宋金
Author NameAffiliation
Qu Junhao Institute of GeologyChina Earthquake AdministrationBeijing 100029China;Earthquake Administration of Shandong ProvinceJinan 250014China 
Jiang Haikun China Earthquake Networks CenterBeijing 100045China 
Li Jin Earthquake Administration of Xinjiang Uygur Autonomous RegionUrumqi 830011China 
Song Jin China Earthquake Networks CenterBeijing 100045China 
摘要:
从介质和应力的不均匀性、力学加载、流体侵入及应力腐蚀、速率-状态依从等几方面对余震活动机理研究进行了综述。已有的研究表明,介质和应力的不均匀性是余震产生的基本前提。瞬时蠕变和余滑观点能够从力学的角度解释震后极短时间内余震的快速衰减,而应力松弛过程更倾向于解释长期余震的活动特征。流体侵入及应力腐蚀在一定的条件下控制着余震的演化过程。受主震应力扰动影响的断层间的相互作用始终存在于余震的活动过程之中。各类模型和理论解释都在一定程度上寻求与G-R关系和修改的大森公式两个基本幂律关系的一致性。
关键词:  余震序列  机理研究  介质不均匀性  应力松弛  修改的大森公式
DOI:
分类号:
基金项目:
A Review of Aftershock Mechanism Research
Qu Junhao,Jiang Haikun,Li Jin,Song Jin
Abstract:
In this paper,research of aftershock mechanisms is reviewed,including heterogeneity of medium and stress,mechanical loading,fluid intrusion and stress corrosion,and ratestate dependence. Previous studies have indicated that the heterogeneity of media and stress is the basic premise of aftershocks generated. From the point view of mechanics, transient creep and afterslip can explain the decay of aftershocks in a short time after a mainshock and the relaxation of stress tends to interpret the characteristics of long-term aftershocks. Fluid intrusion and stress corrosion control the evolution process of the aftershocks under certain conditions. The interaction between the faults perturbed by the mainshock always exists during the aftershock activities. All kinds of models and the theories want to comply with the two basic power-law relationships———the G-R law and Omori law to some extent.
Key words:  Aftershock sequence  Mechanism research  Medium heterogeneity  Stress relaxation  Modified Omori law