我国西部近期应变强度比动态演化特征  

Dynamic Evolution Characteristics of Strain Strength Ratio in the West of China

作　　者：张希[1] 江在森[1] 王双绪[1] 陈文胜[1] 

机构地区：[1]中国地震局第二地形变监测中心,西安710054

出　　处：《地震研究》2001年第2期115-120,共6页Journal of Seismological Research

基　　金：国家"九五"科技攻关"重中之重"项目! 96-913 -0 9-0 2 -0 2的部分研究结果

摘　　要：探索由断层形变资料提取应变强度比并获得动态图像的方法 ,结合 2 0 0 0年景泰 (Ms5 9)等震例 ,给出由我国西部甘、宁、青及川滇地区最新跨断层形变资料所得的应变强度比时空分布动态图像。结果表明 :其具有压性为主的中期背景及中短期前兆 (一年尺度的绝对值 2 0以上高值区 )The method of extracting strain strength ratio from deformation data spanning fault and obtaining dynamic pictures in studied. Combined with earthquake examples such as Jingtai (Ms5 9) in 2000, the dynamic pictures of strain strength ratio obtained from recent deformation data spanning fault of areas of Gansu, Ningxia, Qinghai and Sichuan, Yunnan in the West of China are given. The result show that the dynamic evolution characteristics of abnormality of middle-term background majoring in compression and middle short-term premonitory (one year scale high value region whose absolute value is more than 2 0) can be taken as the criterion of the middle and short-term strong earthquake danger area for above area.

关 键 词：断层形变 应变强度比 动态图像 西部地区 中国 时空分布 地震活动性 强震危险区预报 

分 类 号：P315.5[天文地球—地震学] P315.75[天文地球—固体地球物理学]