151 citations · 618 across the 9 of their papers we have counts for
9 papers
Seismic Electric Signals: A physical interconnection with seismicity
Panayiotis A. Varotsos, Nicholas V. Sarlis, Efthimios S. Skordas +1
By applying natural time analysis to the time series of earthquakes, we find that the order parameter of seismicity exhibits a unique change approximately at the date(s) at which S…
Investigation of the seismicity after the initiation of a Seismic Electric Signal activity until the main shock
N. V. Sarlis, E. S. Skordas, M. S. Lazaridou +1
The behavior of seismicity in the area candidate to suffer a main shock is investigated after the observation of the Seismic Electric Signal activity until the impending mainshock.…
The fluctuations, under time reversal, of the natural time and the entropy distinguish similar looking electric signals of different dynamics
P. A. Varotsos, N. V. Sarlis, E. S. Skordas +1
We show that the scale dependence of the fluctuations of the natural time itself under time reversal provides a useful tool for the discrimination of seismic electric signals (crit…
Comments on the entropy of seismic electric signals under time reversal
P. A Varotsos, N. V. Sarlis, E. S. Skordas +1
We present recent data of electric signals detected at the Earth's surface, which confirm the earlier finding [Phys. Rev. E 73, 031114 (2006)] that the value of the entropy in natu…
Attempt to distinguish the origins of self-similarity by natural time analysis
P. Varotsos, N. Sarlis, E. Skordas +2
Self-similarity may originate from two origins, i.e., the process memory and the process' increments ``infinite'' variance. A distinction is attempted by employing the natural time…
Additional information for the paper `Entropy of seismic electric signals: Analysis in natural time under time-reversal'
P. A. Varotsos, N. V. Sarlis, E. S. Skordas +2
After the submission of the paper, three strong earthquakes with magnitude around 6.0-units occurred on October 17 and October 20, 2005, with epicenters in the Aegean Sea, at a dis…