使用有序样品聚类分析法划分东南沿海地震活跃幕  

Dividing the southeast coastal seismic active episodes using sequence sample cluster analysis

作　　者：杨向东[1] 秦乃岗[2] 

机构地区：[1]中国科技大学空间与地球科学学院,安徽合肥230026 [2]广东省地震局预报研究中心,广东广州510070

出　　处：《华南地震》2004年第2期55-61,共7页South China Journal of Seismology

摘　　要：在对东南沿海地震带空间分布的边界重新做界定的基础上,对该带二十世纪以来地震活跃幕的分段进行了探讨。主要使用了有序样品聚类分析中的离差平方和法、最优分割法,再结合地震学应变能释放水平进行划分。并以离差平方和法中的误差函数的参数变化为标准对划分的结果进行了判定及F值检验,认为该带划分成四个活跃幕较为合理。Based on defining the boundary of the southeast coastal seismic belt again in spatial distribution, this paper focused on discussing to divide the time section into seismic active episodes since the 20th century in the belt. We use mainly the squariance method among sequence samples cluster analysis and the method of optimum partition, and combine the standard of release level of seismology strain energy to divide it. Meanwhile, according to the changes of parameters of the error function in the squariance method, the dividing result is judged by F value. We think that the belt is divide into 4 active seismic episodes is more reasonable.

关 键 词：活跃幕划分 有序样品聚类分析 东南沿海地震带 

分 类 号：P315.5[天文地球—地震学]