摘要
针对辽宁地区地震活动时间序列,运用分维的基本概念,通过其谱密度函数的分维描述,研究地震活动在其不同的阶段,其谱的分维变化情况,并探讨分维的变化与地震活动之间的关系。结果表明:每当有效强的地震活动增强时,在分维图上便会出现明显的降、升维现象,并且下降的幅度与主震震级和下限震级有关。
According to the relation between fractal dimension and density function ofpower spectra,fractal changes of different step of seismicity in Liaoning area have been stud-ied in this paper.The resulth show that obvious fractal down一up changes appear in fractalfigure when seismicity was increasing.
出处
《防灾减灾学报》
1994年第3期1-9,共9页
Journal of Disaster Prevention And Reduction
关键词
时间序列
自仿射分形
分数布朗运动
标度律
局域分维
time sequence
self一affine fractal
fractional Brownian motion
scaling
localfractal