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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

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【作者】 牛安福李旭东郑文衡柯丽君

【Author】 Niu Anfu Li Xudong Zheng Wenheng Ke Lijun ( Institute of Seismology,CSB,Wuhan4 30 0 71 ,China)

【机构】 中国地震局地震研究所

【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。并证实了地壳形变异常强度与地震应变能积累程度具有密切的相关性

【Abstract】 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】 异常强度场演化地震前兆
【Key words】 Anomaly intensity fieldEvolutionEarthquake precursor
【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
  • 【分类号】P312
  • 【被引频次】2
  • 【下载频次】52
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