地震时空丛集程度的度量及震前异常特征初探  

MEASURING OF CLUSTERING DEGREE IN TEMPORAL AND SPATIAL DISTRIBUTION OF EARTHQUAKES AND INITIAL RESEARCH OF ANOMALY CHARACTERISTICS BEFORE EARTHQUAKES

作　　者：张晓东[1] 江志萍[1] 

机构地区：[1]青海省地震局

出　　处：《西北地震学报》1996年第3期37-41,共5页Northwestern Seismological Journal

摘　　要：从Ｍｏｒｉｓｈｉｔａ空间丛集度出发，定义出其时间丛集度的表达式，并计算了几次大震前空间丛集度Ｊｓ和时间丛集度Ｊｔ的时间扫描曲线。从计算结果分析，无论是空间丛集度Ｊｓ还是时间丛集度Ｊｔ在大震发生前大都会出现高值异常。将Ｊｓ和Ｊｔ做了对比，从而对Ｍｏｒｉｓｈｉｔａ指数的含义进行了探讨，分析了各自的优缺点。结果表明。In this paper, according to Morishita's spatial clustering degree, defined formula of temporal clustering degree and calculated time scanning curves of spatial clustering degree J s and temporal clustering degree J t before some large earthquakes. The results show that J s and J t have high value anomaly before large earthquakes. Compared J s with J t, discussed their features and ana lysed respective advantage and shortcoming. Obviously, J s and J t, as an index of seismicity, can be used to predict earthquake.

关 键 词：地震预报 空间丛集度 时间丛集度 地震前兆 

分 类 号：P315.7[天文地球—地震学]