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Long-Memory Trends in Disturbances of Radon in Soil Prior to the Twin ML=5.1 Earthquakes of 17 November 2014 Greece
| Nikolopoulos D1*, Petraki E2, Nomicos C3, Koulouras G3, Kottou S4 and Yannakopoulos PH1 | |
| 1TEI of Piraeus, Department of Electronic Computer Systems Engineering, Petrou Ralli and Thivon 250, GR-12244, Aigaleo, Greece | |
| 2Brunel University, Department of Engineering and Design, Kingston Lane, Uxbridge, Middlesex UB8 3PH, London, UK | |
| 3TEI of Athens, Department of Electronic Engineering, Agiou Spyridonos, GR-12243, Aigaleo, Athens, Greece | |
| 4University of Athens, Medical School, Department of Medical Physics, Mikras Asias 75, GR-11527 Athens, Greece | |
| Corresponding Author : | Nikolopoulos D TEI of Piraeus, Department of Electronic Computer Systems Engineering Petrou Ralli & Thivon 250, GR-12244 Aigaleo, Greece Tel: +0030-21 5381560 E-mail: dniko@teipir.gr |
| Received November 26, 2014; Accepted December 20, 2014; Published January 01, 2015 | |
| Citation: Nikolopoulos D, Petraki E, Nomicos C, Koulouras G, Kottou S, et al. (2015) Long-Memory Trends in Disturbances of Radon in Soil Prior to the Twin ML=5.1 Earthquakes of 17 November 2014 Greece. J Earth Sci Clim Change 6:244. doi: 10.4172/2157-7617.1000244 | |
| Copyright: ©2015 Nikolopoulos D, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. | |
Abstract
On 17 November 2014, at 23:05 and 23:09 local time, two shallow earthquakes of ML=5.1 occurred in Prokopion, Chalkis, 86 km North-West of Athens, Greece. Prior to the earthquakes a significant radon anomaly was observed by a telemetric radon station operating with a Barasol MC2 probe (Algade France). The anomaly lasted approximately between 24 Oct 2014 and 10 November 2014. This paper reports the trends of long-memory that were addressed through Rescaled Range (R/S) analysis and Detrended Fluctuation Analysis (DFA). Hurst exponents above 0.8 were found by R/S analysis during the radon anomaly. The signal exhibited persistent behavior. DFA verified the findings of R/S analysis within the anomaly.
