摘要
通过海城地震余震活动序列资料，根据相空间中余震活动的演化特征，余震活动的功率谱和非线性地震活动演化方程的迭代解详细地研究了余震活动的基本特征．结果显示，余震活动除了通常熟悉的平均的衰减和周期性行为之外，还存在同样显著的混沌行为．
By the data of aftershock activity sequence of Haicheng earthquake,basiccharacteristics of aftershock activity have been studied in dedail,according to evolution fea-ture of aftershocks in phase space,power spectrum of seismicity,and iterative solution ofnonlinear evolution equation of seismicity.The results show that there exists obvious chaosbehaviour in aftershock activity besides usually familiar average behaviours of attenuationand periodicity.
出处
《防灾减灾学报》
1994年第1期1-9,共9页
Journal of Disaster Prevention And Reduction
关键词
相空间
功率谱
非线性
混沌行为
phase space
power spectrum
nonlineearity
chaos behaviour
