195 citations · 1k across the 31 of their papers we have counts for
31 papers
Identifying the approach of a major earthquake
Panayiotis A. Varotsos, Nicholas V. Sarlis, Toshiyasu Nagao
By analyzing the seismicity in natural time and studying the evolution of the fluctuations of the entropy change of seismicity under time reversal for various scales of different l…
A complexity measure in natural time analysis identifying the accumulation of stresses before major earthquakes
Panayiotis A. Varotsos, Nicholas V. Sarlis, Toshiyasu Nagao
Here we suggest a new procedure through which one can identify when the accumulation of stresses before major earthquakes (EQs) (of magnitude M 8.2 or larger) occurs. By analyzing…
Identifying the occurrence time of an impending mainshock: A very recent case
P. A. Varotsos, N. V. Sarlis, E. S. Skordas +1
The procedure by means of which the occurrence time of an impending mainshock can be identified by analyzing in natural time the seismicity in the candidate area subsequent to the…
Geoelectric field and seismicity changes preceding the 2018 Mw6.8 earthquake and the subsequent activity in Greece
N. V. Sarlis, E. S. Skordas, P. A. Varotsos
A strong earthquake of magnitude Mw6.8 struck Western Greece on 25 October 2018 with epicenter at 37.515N 20.564E. It was preceded by an anomalous geolectric signal that was record…
On the anomalous {changes of seismicity and} geomagnetic field prior to the 2011 9.0 Tohoku earthquake
E. S Skordas, N. V. Sarlis
Xu et al. [J. Asian Earth Sci. {\bf 77}, 59-65 (2013)] It has just been reported that approximately 2 months prior to the 9.0 Tohoku earthquake that occurred in Japan on 11 Ma…
Minima of the fluctuations of the order parameter of seismicity worldwide
N. V. Sarlis, S. -R. G. Christopoulos, E. S. Skordas
It has been shown [Phys. Rev. E 84, 022101 (2011); Chaos 22, 023123 (2012)] that earthquakes of magnitude greater or equal to 7 are globally correlated. Such correlations were…