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Entropy 2018, 20(8), 614; https://doi.org/10.3390/e20080614

Study of Geo-Electric Data Collected by the Joint EMSEV-Bishkek RS-RAS Cooperation: Possible Earthquake Precursors

1
Section of Solid State Physics, Department of Physics, National and Kapodistrian University of Athens, Panepistimiopolis, Zografos, Athens 157 84, Greece
2
Solid Earth Physics Institute, Department of Physics, National and Kapodistrian University of Athens, Panepistimiopolis, Zografos, Athens 157 84, Greece
3
CNRSDR7, Observatoire de Physique du Globe de Clermont-Ferrand, Laboratoire Magmas et Volcans, 5 rue Kessler, 63000 Clermont Ferrand, France
4
Institute of Ocean Research and Development, Tokai University, Shizuoka 424-0902, Japan
5
Research Station RAS, Bishkek-49, Kyrgyzstan 720049, Russia
*
Author to whom correspondence should be addressed.
Received: 3 July 2018 / Revised: 9 August 2018 / Accepted: 13 August 2018 / Published: 18 August 2018
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Abstract

By employing the cross-correlogram method, in geo-electric data from the area of Kyrgyzstan for the period 30 June 2014–10 June 2015, we identified Anomalous Telluric Currents (ATC). From a total of 32 ATC after taking into consideration the electric current source properties, we found that three of them are possible Seismic Electric Signal (SES) activities. These three SES activities are likely to be linked with three local seismic events. Finally, by studying the corresponding recordings when a DC alternating source injects current into the Earth, we found that the subsurface resistivity seems to be reduced before one of these three earthquakes, but a similar analysis for the other two cannot be done due to their large epicentral distance and the lack of data. View Full-Text
Keywords: seismic electric signal; cross-correlation; anomalous telluric currents; resistivity; earthquakes seismic electric signal; cross-correlation; anomalous telluric currents; resistivity; earthquakes
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Papadopoulou, K.; Skordas, E.; Zlotnicki, J.; Nagao, T.; Rybin, A. Study of Geo-Electric Data Collected by the Joint EMSEV-Bishkek RS-RAS Cooperation: Possible Earthquake Precursors. Entropy 2018, 20, 614.

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