Multifractal properties of geoelectric time series associated with main shocks occurred in Mexico

Alejandro Ramirez Rojas and Lucía Rebeca Moreno-Torres, UAM Metropolitan Autonomous University of Mexico, Azcapotzalco, Mexico
Abstract:
In this work we preset the temporal evolution of the singularity spectrum in geolectrical time series associated with two strong earthquakes of M = 6. 6 and M = 7. 4, occurred on 24 October 1993 and 14 September 1995, respectively. Using MultiFractal Detrended Fluctuation Analysis (MFDFA) in non-overlapping windows of 2 hour approximately, we calculated the multifractal spectrum on each segment. Our findings show important differences in the singularities spectrum before, during and after the earthquakes studied suggesting a correlation between the fractal features of the geolectrical signals and the preparation processes of the main shock.
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