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Authors: Caruso, F.* 
Pluchino, A.* 
Latora, V.* 
Vinciguerra, S.* 
Rapisarda, A.* 
Title: Analysis of self-organised criticality in the Olami-Feder-Christensen model and in real earthquakes
Journal: Phys. Rev. E 
Series/Report no.: / 75 (2007)
Publisher: American Physical Society
Issue Date: 14-May-2007
DOI: 10.1103/PhysRevE.75.055101
Keywords: SOC, earthquakes interaction
Subject Classification05. General::05.01. Computational geophysics::05.01.04. Statistical analysis 
Abstract: We perform an analysis on the dissipative Olami-Feder-Christensen model on a small world topology considering avalanche size differences. We show that when criticality appears, the probability density functions (PDFs) for the avalanche size differences at different times have fat tails with a q-Gaussian shape. This behavior does not depend on the time interval adopted and is found also when considering energy differences between real earthquakes. Such a result can be analytically understood if the sizes (released energies) of the avalanches (earthquakes) have no correlations. Our findings support the hypothesis that a self-organized criticality mechanism with long-range interactions is at the origin of seismic events and indicate that it is not possible to predict the magnitude of the next earthquake knowing those of the previous ones.
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