References

NHESS

Natural Hazards and Earth System Sciences

NHESS

Nat. Hazards Earth Syst. Sci.

1684-9981

Copernicus Publications

Göttingen, Germany

10.5194/nhess-11-2021-2011

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

Chavez

¹ Pérez-Enríquez

² Cruz-Abeyro

J. A.

² Millan-Almaraz

J. R.

¹ Kotsarenko

² Rojas

División 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

Centro de Geociencias (CGEO), Juriquilla, UNAM, Apdo Postal 1-742, Centro Querétaro, Querétaro, México, C.P. 76001, México

21 07 2011

11 7 2021 2027

2011

This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/

This article is available from https://nhess.copernicus.org/articles/11/2021/2011/nhess-11-2021-2011.html

The full text article is available as a PDF file from https://nhess.copernicus.org/articles/11/2021/2011/nhess-11-2021-2011.pdf

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) 10<sup>0.45M</sup>, 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 (S<sub>4</sub>) shows important differences one day before and one day after the EQs (magnitudes considered are from 6 to 7.2).

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