丽江地震前后川滇地区地壳形变异常强度场及其演化  

ON THE ANOMALY INTENSITY FIELD AND ITSEVOLUTION IN SICHUAN- YUNNAN REGION BEFORE AND AFTER LIJIANG EARTHQUAKE

作　　者：牛安福[1] 李旭东[1] 郑文衡 柯丽君 

机构地区：[1]中国地震局地震研究所,中国武汉430071

出　　处：《地震》1998年第3期303-307,共5页Earthquake

基　　金：地震科学联合基金会!(1970 66);和国家地震局科研攻关项目!( 95-0 4 -0 3-0 5-0 1 ;96-91 3-0 1 -0 1 -0 5)的联合资助课题

摘　　要：地震过程是应变能积累与释放的结果。如何描述积累的程度并对出现的异常进行检测 ,一直缺少合理的定量化研究。通过对各项观测之间相关性的分析 ,讨论了地壳形变过程的异常强度指标 ,并进一步构造了异常强度的空间分布及其演化图像。与地震活动的联系表明 ,地震多发生在区域异常集中出现后的异常平静时 ,且远离异常集中区。It is well-known that the earthquake is result from the accumulation and release of strain energy. There hasnotbeen quantitative analysis and description fora long time. On the basis of correlation between observed items,the index of anomaly intensity has been researched,and the intensity field evolution images also have been constructed. It is demonstrated that the most earthquakes were occurred during anomaly quiescence and far from the anomaly areas after the regional anomaly concentration.The close relation be- tween anomaly intensity and accumulation of strain is shown in this paper.

关 键 词：异常强度场 地震前兆 川滇地区 地壳变形 

分 类 号：P315.7[天文地球—地震学] P315.2[天文地球—固体地球物理学]