Temporal variations of long-term correlations in seismic activity fluctuations

J. Alvarez-Ramirez, J.C. Echeverria and E. Rodriguez

Physica A: Statistical Mechanics and its Applications, 2012, vol. 391, issue 6, 2261-2267

Abstract: The scaling behavior of the 1998–2009 seismicity in Guerrero, southern Mexico, was studied by means of the detrended fluctuation analysis (DFA). We found that inter-seismic periods are correlated with a transition in the scaling behavior at about 200 seismic events. Correlations are relatively weak for small time scales. However, for large time scales, correlations are associated with a 1/f fractional process, indicating that the seismicity pattern emerges from a self-organized critical state. Temporal variations of the scaling exponent along years computed from the DFA indicate the presence of a quasi-biennial cycle in the seismicity correlations. This cyclic behavior was apparently triggered by the large 2001–2002 slow slip event in the Guerrero seismic gap. Besides, the significant seismic events (Mw>5) originate, on the average, at deeper regions in each cycle.

Keywords: Seismicity; Scaling behavior; Detrended fluctuation analysis; Cycles (search for similar items in EconPapers)
Date: 2012
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:391:y:2012:i:6:p:2261-2267

DOI: 10.1016/j.physa.2011.12.002

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