Exploring nonlinear characteristics in seismogenic process |
| |
| Authors: | Zhen-Wen An Lin-Ying Wang Yao Chen and Han-Meng Pan |
| |
| Institution: | (1) Institute of Geophysics, State Seismological Bureau, 100081 Beijing, China;(2) Department of Mechanics of Peking University, 100871 Beijing, China |
| |
| Abstract: | Power spectral characteristics of the seismic activities before and after the seven large earthquake — Haicheng, Tangshan,
Lancang, Longling, Mabian, Puer and Songpan are studied by spectrum analysis method. The results show that they all have continuous
power spectrum and aperiodic behaviour. When the time away from the large earthquake occurrence, the characteristics of the
seismic activities are obviously accompanied by stochastic components. About one year before main shock, the moving orbits
constructed by spectrum amplitudes showed the contracting tendency. And the properties during that time may display as flicker
noise. One’s another time almost mixed whole phase space. But the essence of seismic activities after main shocks is a chaotic
state accompanied with much noises.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,15, 276–281, 1993.
This subject is supported by the Chinese Joint Seismological Foundation. |
| |
| Keywords: | flicker noise power spetrum mixing chaos affinity |
| 本文献已被 SpringerLink 等数据库收录！ |
|
