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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 11, issue 7 | Copyright
Nat. Hazards Earth Syst. Sci., 11, 2021-2027, 2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 21 Jul 2011

Research article | 21 Jul 2011

Detection of electromagnetic anomalies of three earthquakes in Mexico with an improved statistical method

O. Chavez1, R. Pérez-Enríquez2, J. A. Cruz-Abeyro2, J. R. Millan-Almaraz1, A. Kotsarenko2, and E. Rojas1 O. Chavez et al.
  • 1División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Centro Universitario, Cerro de las Campanas s/n, Querétaro, Querétaro, C.P. 76010, México
  • 2Centro de Geociencias (CGEO), Juriquilla, UNAM, Apdo Postal 1-742, Centro Querétaro, Querétaro, México, C.P. 76001, México

Abstract. A method for detecting seismomagnetic signals is presented. This work presents evidence of geomagnetic perturbations associated with three earthquakes (EQs) that occurred in Mexico within a distance of ρ = (1.8) 100.45M, where M is the magnitude of the EQ, during the year 2010. An improved statistical analysis in relation with the polarization analysis (as the ratio of vertical magnetic field component to the horizontal one) has been developed. The variation index (S4) shows important differences one day before and one day after the EQs (magnitudes considered are from 6 to 7.2).

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