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| Titel |
Assestment of correlations and crossover scale in electroseismic time series |
| VerfasserIn |
L. Guzmán-Vargas, A. Ramírez-Rojas, F. Angulo-Brown |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250019872
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| Zusammenfassung |
| Evaluating complex fluctuations in electroseismic time series is an important task not only for
earthquake prediction but also for understanding complex processes related to earthquake
preparation. Previous studies have reported alterations, as the emergence of correlated
dynamics in geoelectric potentials prior to an important earthquake (EQ). In this work, we
apply the detrended fluctuation analysis and introduce a statistical procedure to characterize
the presence of crossovers in scaling exponents, to analyze the fluctuations of geoelectric
time series monitored in two sites located in Mexico. We find a complex behavior
characterized by the presence of a crossover in the correlation exponents in the vicinity
of a M=7.4 EQ occurred on Sept. 14, 1995. Finally, we apply the t-student test
to evaluate the level of significance between short and large scaling exponents. |
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