短临地震前兆空间非均匀性的定量研究

The quantitative study of spatial inhomogeneity distribution of short and imminent earthquake precursors

利用《中国震例》中总结出的短临前兆资料 ,计算了华北地区 1 969～ 1 983年间发生的 1 3次 5级以上地震前各类短临前兆空间群体分布的 CV 值。结果表明 ,震前短临前兆数≥ 6次的 8个震例中 ,有 6个震前短临前兆空间分布的 CV 值明显高于二维连续空间随机均匀分布的 CV值 ,说明短临地震前兆空间分布具有明显的非均匀性。

The C V value of spatial distribution of short and imminent earthquake precursors of 13 earthquakes with magnitude M S≥5 occurred in North China from 1969 to 1983 is calculated according to the precursor data recorded in of《Earthquake Cases in China》.The results indicate that the C V value of six cases out of 8 ones with precursor numbers≥6,is higher than that of random and homogeneous distribution in 2 dimension continuance space.This indicates that the spatial distribution of short and imminent precursors before earthquakes is inhomogeneity.