孕震断层的形变模型及其失稳判据  

DEFORMATION MODEL OF SEISMOGENIC FAULT AND ITS CRITERION OF INSTABILITY

作　　者：吴云[1] 施顺英[1] 

机构地区：[1]国家地震局地震研究所

出　　处：《地壳形变与地震》1996年第4期9-14,共6页Crustal Deformation and Earthquake

基　　金：国家地震局资助

摘　　要：提出了孕震断层的形变模型，讨论了该模型的形变特征，给出了其失稳的临界条件。通过对失稳过程的分析，对孕震期作了新的划分，并给出了失稳临界条件的形变判据。指出：综合使用ＧＰＳ测量、跨断层短基线测量和固体潮观测，可以对孕震的时间进程实施追踪，并可对孕震的危险程度作出判定。In this paper,a deformation model of seismogenic faults is proposed in accordance with the researches on the motion and deformation of faults and their relation to earthquake.The characteristics of the deformation under model are discussed and the critical conditions of the instability of fault are given.The criterion of instability and the new partition of seismogenic process are presented by analyzing the instability process under model.It is considered that a seismogenic process can be traced by using synthetically the observations of GPS,short baseline across fault and earth tide.

关 键 词：地壳形变 断层运动 固体潮 孕震过程 形变模型 

分 类 号：P315.2[天文地球—地震学]