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Natural time analysis: Results related to two earthquakes that occurred in Greece during 2019
Nicholas V Sarlis 1, 2 , Efthimios S Skordas 2, 3 , Panayiotis A Varotsos * 1, 2
1  Section of Solid State Physics, Department of Physics, National and Kapodistrian University of Athens, Panepistimiopolis, Zografos 157 84, Athens, Greece
2  Solid Earth Physics Institute, Department of Physics, School of Science, National and Kapodistrian University of Athens, Panepistimiopolis, Zografos 157 84, Athens, Greece
3  Section of Solid State Physics, Department of Physics, School of Science, National and Kapodistrian University of Athens, Panepistimiopolis, Zografos 157 84, Athens, Greece

10.3390/IECG2019-06194
Abstract:

The following two earthquakes occurred in Greece during 2019: First, a Mw5.4 earthquake [1] close to Preveza city in Western Greece on 5 February and a Mw5.3 earthquake [2] 50km East of Patras on 30 March. Here, we present the natural time analysis [3] of the seismic electric signals (SES) activities [4,5] that have been recorded before these two earthquakes. In addition, we explain how we can identify the occurrence times of these two earthquakes by analyzing in natural time the seismicity subsequent to the SES activities.

References

[1] European Mediterranean Seismological Center, M5.4-GREECE- 2019-02-05 02:26:09UTC https://www.emsc-csem.org/Earthquake/earthquake.php?id=742939

[2] European Mediterranean Seismological Center, M5.3-GREECE-2019-03-30 10:46:18UTC https://www.emsc-csem.org/Earthquake/earthquake.php?id=754693

[3] P. A. Varotsos, N. V. Sarlis and E. S. Skordas, Natural Time Analysis: The new view of time. Precursory Seismic Electric Signals, Earthquakes and other Complex Time-Series, Springer-Verlag, Berlin Heidelberg (2011) 449 pages.

[4] P. Varotsos and K. Alexopoulos, Physical properties of the variations of the electric field of the Earth preceding earthquakes, I. Tectonophysics 110, 73-98, 1984.

[5] P. Varotsos and K. Alexopoulos, Physical properties of the variations of the electric field of the Earth preceding earthquakes, II. Determination of epicenter and magnitude, Tectonophysics 110, 99-125, 1984.

Keywords: earthquakes; natural time; seismic electric signals; Greece
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