Evidence of q-exponential statistics in Greek seismicity

Chris G. Antonopoulos*, George Michas, Filippos Vallianatos, Tassos Bountis

*Corresponding author for this work

Research output: Contribution to journalArticle

23 Citations (Scopus)
1 Downloads (Pure)

Abstract

We study the seismicity (global seismic activity) that occurred in Greece between 1976 and 2009 based on the dataset reported in Makropoulos et al. (2012), using concepts of non-extensive Statistical Physics. By considering the entire and declustered datasets, for which the aftershocks have been removed, we initially investigate the frequency-magnitude distribution and find that both datasets are well approximated by a physical model derived in the framework of non-extensive Statistical Physics. We then carry out a study of the distribution of interevent times of seismic events for different magnitude thresholds and discover that the data are well approximated by a statistical distribution of the q-exponential type that allows us to compute analytically the risk function of earthquake production. Our analysis thus reveals further evidence that the underlying dynamical process of earthquake birth reflects a kind of nonlinear memory due to long-term persistence of seismic events. (C) 2014 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)71-77
Number of pages7
JournalPhysica. A, Statistical Mechanics and its Applications
Volume409
Early online date9 May 2014
DOIs
Publication statusPublished - 1 Sep 2014

Keywords

  • seismicity
  • non-extensive statistical mechanics
  • q-exponential statistics
  • frequency magnitude distribution
  • interevent times distribution
  • hazard function estimation
  • West Corinth Rift
  • successive earthquakes
  • non-extensivity
  • physics
  • sequence

Cite this