TITLE:
Study on Simulation of Foreshock Activity Properties before Strong Earthquake Using Heterogeneous Cellular Automata Models
AUTHORS:
Meng Li, Feng Yang, Tao Zhang
KEYWORDS:
Cellular Automata Model; Simulation; Heterogeneity; Foreshock Activity
JOURNAL NAME:
International Journal of Geosciences,
Vol.5 No.3,
March
27,
2014
ABSTRACT:
Three
different degrees of heterogeneous fault models are simulated by using 2-D
random dynamic cellular automata models for analyzing macroscopic behaviors of
seismic activity evolution influenced by heterogeneity of fault structures. The
results show that the heterogeneities of fault structures can influence
evolution properties of the foreshock activity and rupture process, such as the
mediate heterogeneous and less heterogeneous structures, which show relatively
higher ASR rates and more significant seismic gaps before main shocks. Besides,
stress drop distribution ranges of the foreshock events when approaching a main
shock show more homogenous (narrower) than that of the foreshock events far
from a main shock. So the heterogeneity of fault structures plays an important
role in strong earthquake preparation processes.