Occurrence Time of the Deadly Mexico M8.2 Earthquake
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  • Release Date: 2021-11-16
  • natural time analysis
  • order parameter of seismicity
  • entropy change under time reversal
Video Introduction

This video is adapted from 10.3390/e21030301

It has been shown that some dynamic features hidden in the time series of complex systems can be unveiled if authors analyze them in a time domain termed natural time. In this video, researchers 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, authors discuss a procedure through which they 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, researchers 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, authors 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.

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Ramírez-Rojas, A.; Sarlis, N.; Skordas, E.; Varotsos, P. Occurrence Time of the Deadly Mexico M8.2 Earthquake. Encyclopedia. Available online: https://encyclopedia.pub/video/video_detail/122 (accessed on 19 April 2024).
Ramírez-Rojas A, Sarlis N, Skordas E, Varotsos P. Occurrence Time of the Deadly Mexico M8.2 Earthquake. Encyclopedia. Available at: https://encyclopedia.pub/video/video_detail/122. Accessed April 19, 2024.
Ramírez-Rojas, Alejandro, Nicholas Sarlis, Efthimios Skordas, Panayiotis Varotsos. "Occurrence Time of the Deadly Mexico M8.2 Earthquake" Encyclopedia, https://encyclopedia.pub/video/video_detail/122 (accessed April 19, 2024).
Ramírez-Rojas, A., Sarlis, N., Skordas, E., & Varotsos, P. (2021, November 16). Occurrence Time of the Deadly Mexico M8.2 Earthquake. In Encyclopedia. https://encyclopedia.pub/video/video_detail/122
Ramírez-Rojas, Alejandro, et al. "Occurrence Time of the Deadly Mexico M8.2 Earthquake." Encyclopedia. Web. 16 November, 2021.