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Here, we check the obedience of new data, derived from the <i>M</i><sub>w</sub> =5.4 earthquake on 7 August 2013 in Central Greece, to a previously foundpower law relation by the author between the stress drop of an earthquake andthe lead time of its precursory seismic electric signal (SES). An exponentvalue α =0.329 has been found which is in excellent agreement withprevious ones reported in a series of articles by the author. This valuefalls in the range of critical exponents suggested by various models forfracture and is very close to a reported one which interconnects theamplitude of the SES and the magnitude of the impending earthquake. Thestability of this exponent confirms the credibility of the above-mentionedpower law and probably implies that real physical dynamic processes evolvingto criticality are present in the pre-focal area when the SES is emitted

Brief Communication: The recent seismic activity in Central Greece in 2013 and its precursory electric signals in terms of criticality