Articles | Volume 8, issue 4
Nat. Hazards Earth Syst. Sci., 8, 855–860, 2008

Special issue: Earthquakes precursors and seismic hazard

Nat. Hazards Earth Syst. Sci., 8, 855–860, 2008

  15 Aug 2008

15 Aug 2008

Multiscale entropy analysis of electroseismic time series

L. Guzmán-Vargas1,3, A. Ramírez-Rojas2, and F. Angulo-Brown3 L. Guzmán-Vargas et al.
  • 1Unidad Profesional Interdisciplinaria en Ingeniería y Tecnologías Avanzadas, Instituto Politécnico Nacional, Av. IPN No. 2580, Col. Ticomán, México D. F. 07340, Mexico
  • 2Departamento de Ciencias Básicas, Universidad Autonoma Metropolitana, Av. San Pablo 180, Col. Reynosa, Azcapotzalco, México D. F. 02200, Mexico
  • 3Departamento de Física, Escuela Superior de Física y Matemáticas, Instituto Politécnico Nacional, Edif. No. 9 U.P. Zacatenco, México D. F. 07738, Mexico

Abstract. In this work we use the multiscale entropy method to analyse the variability of geo-electric time series monitored in two sites located in Mexico. In our analysis we consider a period of time from January 1995 to December 1995. We systematically calculate the sample entropy of electroseismic time series. Important differences in the entropy profile for several time scales are observed in records from the same station. In particular, a complex behaviour is observed in the vicinity of a M=7.4 EQ occurred on 14 September 1995. Besides, we also compare the changes in the entropy of the original data with their corresponding shuffled version.