Recurrence interval statistics of cellular automaton seismicity models

Weatherley, D (2006) Recurrence interval statistics of cellular automaton seismicity models. Pure And Applied Geophysics, 163 9: 1933-1947.

Document type:	Journal Article
Collections:	Excellence in Research Australia (ERA) - Collection Earth Systems Science Computational Centre Publications

Author(s)	Weatherley, D
Title	Recurrence interval statistics of cellular automaton seismicity models
Journal name	Pure And Applied Geophysics
Publication date	2006
Volume number	163
Issue number	9
ISBN	3-7643-7991-X
ISSN	0033-4553
Start page	1933
End page	1947
Total pages	15
Place of publication	Basel
Publisher	Birkhauser Verlag
Collection year	2006
Subject	C1 260206 Earthquake Seismology 780104 Earth sciences
Abstract	The recurrence interval statistics for regional seismicity follows a universal distribution function, independent of the tectonic setting or average rate of activity (Corral, 2004). The universal function is a modified gamma distribution with power-law scaling of recurrence intervals shorter than the average rate of activity and exponential decay for larger intervals. We employ the method of Corral (2004) to examine the recurrence statistics of a range of cellular automaton earthquake models. The majority of models has an exponential distribution of recurrence intervals, the same as that of a Poisson process. One model, the Olami-Feder-Christensen automaton, has recurrence statistics consistent with regional seismicity for a certain range of the conservation parameter of that model. For conservation parameters in this range, the event size statistics are also consistent with regional seismicity. Models whose dynamics are dominated by characteristic earthquakes do not appear to display universality of recurrence statistics.
Keyword(s)	Geochemistry & Geophysics Earthquakes Recurrence Statistics Cellular Automata Self-organized Criticality Evolution Size Simulation Fault