@article{ref1,
title="Identifying the occurrence time of the deadly Mexico M8.2 earthquake on 7 september  2017",
journal="Entropy (Basel, Switzerland)",
year="2019",
author="Sarlis, Nicholas V. and Skordas, Efthimios S. and Varotsos, Panayiotis A. and Ramírez-Rojas, Alejandro and Flores-Márquez, Elsa Leticia",
volume="21",
number="3",
pages="e301-e301",
abstract="It has been shown that some dynamic features hidden in the time series of complex  systems can be unveiled if we analyze them in a time domain termed natural time. In  this analysis, we can identify when a system approaches a critical point (dynamic  phase transition). Here, based on natural time analysis, which enables the  introduction of an order parameter for seismicity, we discuss a procedure through  which we could achieve the identification of the occurrence time of the M8.2  earthquake that occurred on 7 September 2017 in Mexico in Chiapas region, which is  the largest magnitude event recorded in Mexico in more than a century. In  particular, we first investigated the order parameter fluctuations of seismicity in  the entire Mexico and found that, during an almost 30-year period, i.e., from 1  January 1988 until the M8.2 earthquake occurrence, they were minimized around 27  July 2017. From this date, we started computing the variance of seismicity in  Chiapas region and found that it approached the critical value 0.070 on 6 September  2017, almost one day before this M8.2 earthquake occurrence.<p /> <p>Language: en</p>",
language="en",
issn="1099-4300",
doi="10.3390/e21030301",
url="http://dx.doi.org/10.3390/e21030301"
}