华北构造区强震短期水氡异常空间图像演化及其前兆判别标志的研究  

Study on the spatial evolution of the short-term anomaly of Rn in underground water before strong shocks in the tectonic area of North China and the discrim-inative mark of precursors

作　　者：郑文俊[1] 邵永新[1] 田山[1] 董晓阳[1] 

机构地区：[1]天津市地震局,天津300201

出　　处：《地震》2006年第4期29-36,共8页Earthquake

基　　金："十五"国家科技攻关项目(01-01-03)

摘　　要：开展了水氡前兆异常参数提取方法的研究，并以其提取的结果为输入，对1985-2002年华北水氡异常参数分布做了全时空扫描，继而将全部图像与华北地区构造活动性评估的数字化图像进行了叠加，实现了水氡异常动态扫描与区域构造活动性背景的结合。在此基础上，1985年以来华北地区5级以上地震前的水氡短期图像演化情况做了全面分析，提取出判别异常区的指标以及地震短期异常演化特征，并提出了华北地区强震前水氡短期前兆的判别标志。In this paper, the method was studied that the anomaly parameter of seismic precursor being abstracted form the observational data of Rn in underground water, and the pattern of spatial distribution of the anomaly of Rn in North China was scanned from 1985 to 2002 by using the parameters as inputs. And then, the scanned pattern were superposed with the numerical pattern of quantitative evaluation of the tectonic activity and seismic risk in North China, so as to realize the combination of the spatial scanning of precursor anomaly and the active tectonic setting. On the basis of above work, the analysis was made entirely for the evolution of pattern of Rn in underground water before the shocks （Ms≥5.0） took place in North China since 1985, and the discriminative criteria of the short-term Rn anomaly and the characteristics of spatial evolution of anomaly areas before shocks were abstracted. Finally, the discriminative mark of short-term precursor of Rn in underground water before strong shocks in North China was proposed.

关 键 词：水氡 演化图像 短期前兆 判别标志 

分 类 号：P315.72[天文地球—地震学]