NHESS Natural Hazards and Earth System Sciences NHESS Nat. Hazards Earth Syst. Sci. 1684-9981 Copernicus Publications Göttingen, Germany 10.5194/nhess-12-2603-2012 Testing the critical exponent in the relation between stress drop of earthquake and lead time of seismic electric signal Dologlou E. 1 Solid State Section, Department of Physics, University of Athens, Panepistimiopolis, Zografou 157 84 Athens, Greece 16 08 2012 12 8 2603 2607 Copyright: © 2012 E. Dologlou 2012 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://nhess.copernicus.org/articles/12/2603/2012/nhess-12-2603-2012.html The full text article is available as a PDF file from https://nhess.copernicus.org/articles/12/2603/2012/nhess-12-2603-2012.pdf

The application of new data in the power law relation between the stress drop of the earthquake and the lead time of the precursory seismic electric signal led to an exponent which falls in the range of the values of critical exponents for fracture and it is in excellent agreement with a previous one found by (Dologlou, 2012). In addition, this exponent is very close to the one reported by Varotsos and Alexopoulos (1984a), which interconnects the amplitude of the precursory seismic electric signals (SES) and the magnitude of the impending earthquake. Hence, the hypothesis that underlying dynamic processes evolving to criticality prevail in the pre-focal area when the SES is emitted is significantly supported.

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