Articles | Volume 20, issue 5
Nonlin. Processes Geophys., 20, 713–724, 2013
https://doi.org/10.5194/npg-20-713-2013
Nonlin. Processes Geophys., 20, 713–724, 2013
https://doi.org/10.5194/npg-20-713-2013

Research article 27 Sep 2013

Research article | 27 Sep 2013

Non-extensivity and long-range correlations in the earthquake activity at the West Corinth rift (Greece)

G. Michas1, F. Vallianatos1,2, and P. Sammonds1 G. Michas et al.
  • 1Institute for Risk and Disaster Reduction, University College London, Gower Street, London, WC1E 6BT, UK
  • 2Laboratory of Geophysics and Seismology, Technological Educational Institute of Crete, Chania, 73133, Crete, Greece

Abstract. In the present work the statistical properties of the earthquake activity in a highly seismic region, the West Corinth rift (Central Greece), are being studied by means of generalized statistical physics. By using a dataset that covers the period 2001–2008, we investigate the earthquake energy distribution and the distribution of the time intervals (interevent times) between the successive events. As has been reported previously, these distributions exhibit complex statistical properties and fractality. By using detrended fluctuation analysis (DFA), a well-established method for detection of long-range correlations in non-stationary signals, it is shown that long-range correlations are also present in the earthquake activity. The existence of these properties motivates us to use non-extensive statistical physics (NESP) to investigate the statistical properties of the frequency-magnitude and the interevent time distributions, along with other well-known relations in seismology, such as the gamma distribution for interevent times. The results of the analysis indicate that the statistical properties of the earthquake activity can be successfully reproduced by means of NESP and that the earthquake activity at the West Corinth rift is correlated at all-time scales.

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