Natural Hazards and Earth System Sciences Multiscale entropy analysis of electroseismic time series

Abstract. In this work we use the multiscale entropy method to analyse the variability of geo-electric time series moni-tored in two sites located in Mexico. In our analysis we con-sider a period of time from January 1995 to December 1995. We systematically calculate the sample entropy of electro-seismic time series. Important differences in the entropy pro-file 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.