Title of article :
Long-range correlations in two-dimensional spatio-temporal seismic fluctuations
Author/Authors :
Luciano Telesca، نويسنده , , Michele Lovallo، نويسنده , , Vincenzo Lapenna، نويسنده , , Vincenzo Lapenna and Maria Macchiato ، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
6
From page :
279
To page :
284
Abstract :
We analysed the scaling behaviour of the two-dimensional (2-D) sequence (Δs, Δt) of the 1981–1998 southern California seismicity, where Δs is the distance between two consecutive earthquakes (jump) and Δt is their interevent interval. The 2-D seismic spatio-temporal fluctuations were investigated by means of the detrended fluctuation analysis (DFA), well-known methodology used to detect scaling behaviour in observational time series possibly affected by nonstationarities. The estimated scaling exponents αDFA, larger than 0.5, indicate the presence of persistent long-range correlations in the 2-D sequence analysed. The variation of the scaling exponent with the increase of threshold magnitude shows a two-fold behaviour: in the range between 1.5 (the completeness magnitude of the catalog) and 3.0, the scaling exponent is quite constant and denoting a flicker-noise dynamics; while for magnitudes larger than 3.0 it decreases with the increase of magnitude, indicating a tendency toward a 2-D space–time Poissonian process for large events.
Journal title :
Physica A Statistical Mechanics and its Applications
Serial Year :
2007
Journal title :
Physica A Statistical Mechanics and its Applications
Record number :
871508
Link To Document :
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