摘要
采用标度变换法,对云南省西北部地区地震活动空间分布的关联维进行了计算,得到了云南西北部不同时段的地震活动空间分布关联维的等值线图.讨论了强震发生前后震中地区关联维演变过程和空间分布特征随时间变化,结果显示,M≥6.0强震发生前存在不同形式的降维过程.
The correlation dimension of space distribution of seismic activity in northwest ot Yunnan is calculated by means of scale transformation. The contour map of spatial correlation dimension distribution at different periods in northwest of Yunnan are obtained. The evolving process of correlation dimension and the characteristics of space distribution variation with time before and after strong earthquakes are discussed. The results showed that there is a phenomenon of fractal dimension dropping before the occurring of M ≥ 6.0 earthquakes.
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第3期266-271,共6页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学基金资助项目(40364001)
关键词
地震活动
关联维
无标度区
标度变换法
云南西北部
seismic activity
correlation dimension
no - scale region
scale transformation
northwest of Yunnan
