Cross-correlation analysis for geoelectric time series associated with an earthquake by means of mutual information theory

A. Ramírez-Rojas, R. T, J. Rubén Luévano


We apply ~information theory to characterize electric self-potential time series monitored in the most important seismic region in México. We ~ compute the level of global cross-correlation between two perpendicular components of such~time series. Both time series were monitored, for a period of several months, before, during and after of a Ms = 7.4 earthquake occurred on~September 14, 1995. Our calculations~are~based on~the re-scaled average mutual information index $\lambda =\lambda $(I), where I is the mutual information function and $\lambda $~is a measure of strength of nonlinear correlations between two times series. ~Our findings~suggest that the high level of global correlation observed between both electric field components during several~months before the event, is associated with the preparation mechanism of the occurred earthquake.


Mutual Information; Cross-correlation; electric self-potential

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Revista Mexicana de Física S

 ISSN: In Process

  Non periodical electronic journal published by Sociedad Sociedad Mexicana de Física, A.C

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