The following two earthquakes occurred in Greece during 2019: First, a Mw5.4 earthquake  close to Preveza city in Western Greece on 5 February and a Mw5.3 earthquake  50km East of Patras on 30 March. Here, we present the natural time analysis  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.
 European Mediterranean Seismological Center, M5.4-GREECE- 2019-02-05 02:26:09UTC https://www.emsc-csem.org/Earthquake/earthquake.php?id=742939
 European Mediterranean Seismological Center, M5.3-GREECE-2019-03-30 10:46:18UTC https://www.emsc-csem.org/Earthquake/earthquake.php?id=754693
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 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.
 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.