强震前水氡异常台站时空分布非均匀性变化特征  

The characteristics of variation in inhomogeneity of temporal-spatial distribution of radon anomaly before strong earthuakes

作　　者：陈学忠[1] 王晓青[1] 李志雄[2] 

机构地区：[1]中国地震局分析预报中心,北京100036 [2]中国地震局,北京100036

出　　处：《地震》2000年第1期39-44,共6页Earthquake

基　　金：地震科学联合基金!9507435

摘　　要：研究了华北地区６级左右强震前水氡观测值异常的时空非均匀分布变化特征。结果表明，在强震前水氡观测异常台站的空间分布非均匀性发生显著变化，Ｃｖ值有明显的升高过程。这说明，强震前短临地震前兆异常空间分布的非均匀性增强，变得更加不均匀，这可能反映了地壳应力场的增强过程。The characteristics of variation in inhomogeneity of temporal-spatial distribution of stations with Radon anomaly observed before strong earthquakes with magnitude of about 6 occurred in North China are Investigated. To describe the inhomogeneity of tem- poral-spatial distribution of observational station, showing Radon anomaly, Cv value is employed. The results show that the Cv value distribution of short-term and imminent pre- cursors increases and becomes more inhomogeneous before the strong earthquakes, which could reflect the enhancement of the crustal stresses.

关 键 词：水氡 非均匀性 强震 华北地区 地震前兆 

分 类 号：P315.7[天文地球—地震学]