Brief Communication: The recent seismic activity in Central Greece in 2013 and its precursory electric signals in terms of criticality
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 found power law relation by the author between the stress drop of an earthquake and the lead time of its precursory seismic ele...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2014-01-01
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| Series: | Nonlinear Processes in Geophysics |
| Online Access: | http://www.nonlin-processes-geophys.net/21/149/2014/npg-21-149-2014.pdf |
| Summary: | 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 found
power law relation by the author between the stress drop of an earthquake and
the lead time of its precursory seismic electric signal (SES). An exponent
value α =0.329 has been found which is in excellent agreement with
previous ones reported in a series of articles by the author. This value
falls in the range of critical exponents suggested by various models for
fracture and is very close to a reported one which interconnects the
amplitude of the SES and the magnitude of the impending earthquake. The
stability of this exponent confirms the credibility of the above-mentioned
power law and probably implies that real physical dynamic processes evolving
to criticality are present in the pre-focal area when the SES is emitted. |
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| ISSN: | 1023-5809 1607-7946 |