地震前应变、应力测量异常特征研究  

STUDY ON THE ANOMALY CHARACTERISTICS OF STRAIN AND STRESS MEASUREMENT BEFORE EARTHQUAKE

作　　者：赵淑平[1] 王梅[1] 魏焕[1] 

机构地区：[1]山东省地震局,济南250014

出　　处：《高原地震》1997年第2期51-57,共7页Plateau Earthquake Research

摘　　要：据震例资料显示应变、应力测量异常形态与区域应力场增强失稳状态相关。主要特征：1．震前主应力方向发生明显偏转并指向震中区域；2．临震前应力测量异常显示四象限空间分布，张、压区域与震源机制解有明显相关性；3．异常形态与岩石破裂实验数值模拟结果有较好的一致性。According to the earthquake data, strain and stress measurement anomaly is related to the unstability of regional stress field. The main characteristics are: 1. The direction of principal stress is obviously turned to the epcentre region before the earthquake ; 2. Stress measurement anomaly distribute in four quadrants, the regions of tensile and compressive forces are related to the focal mechanism solution; 3. Anomaly shape is consistent well with the numerical simulation of the rock - breaking test.

关 键 词：岩石破裂实验 应力 应变 震源机制解 

分 类 号：P315.72[天文地球—地震学]