A Non-Extensive Statistical Physics View of the Temporal Properties of the Recent Aftershock Sequences of Strong Earthquakes in Greece  
[PERSON]  
1 Section of Geophysics-Geothermics, Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimiopolis, 15784 Athens, Greece 12 Institute of Physics of Earth's Interior and Geobazards, UNESO Chair on Solid Earth Physics and Geobazards Risk Reduction, Hellenic Mediterranean University Research Center, Crete, 73133 Chania, Greece 2  
[PERSON]  
1 Section of Geophysics-Geothermics, Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimiopolis, 15784 Athens, Greece 12 Institute of Physics of Earth's Interior and Geobazards, UNESO Chair on Solid Earth Physics and Geobazards Risk Reduction, Hellenic Mediterranean University Research Center, Crete, 73133 Chania, Greece 2  
[PERSON]  
1 Section of Geophysics-Geothermics, Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimiopolis, 15784 Athens, Greece 12 Institute of Physics of Earth's Interior and Geobazards, UNESO Chair on Solid Earth Physics and Geobazards Risk Reduction, Hellenic Mediterranean University Research Center, Crete, 73133 Chania, Greece 2  
[PERSON]  
1 Section of Geophysics-Geothermics, Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, Panepistimiopolis, 15784 Athens, Greece 12 Institute of Physics of Earth's Interior and Geobazards, UNESO Chair on Solid Earth Physics and Geobazards Risk Reduction, Hellenic Mediterranean University Research Center, Crete, 73133 Chania, Greece 2  
Footnote 1: email: [EMAIL_ADDRESS]-gcl.  
geodynamic processes and seismicity, with several large magnitude events reported in both historic and modern times [2]. In terms of seismic energy release, Greece is ranked first in the Mediterranean and Europe, and sixth in the world [3]. This high seismic activity is commonly linked to the following geotectonic features: (a) the continental convergence, which consists of the oceanic component of the North African plate subduction beneath the European plate. Due to the accretion of African plate sediments beneath the underlying Aegean plate, this movement was coupled with severe crustal shortening and an uplift rate of a few millimeters per year throughout the Hellenic Arc, (b) the rollback of the subducting African slab causes high-rate extension in the back-arc area and last (c) the most prominent tectonic feature of the North Aegean Sea, the North Aegean Trough (NAT) and the Cephalonia Transform Zone (CTFZ) [4].  
Based on the recent earthquake activity over the last four years, this area of Greece is characterized by strong earthquakes. More specifically, we focus on the recent strong earthquakes such as that of \(M_{w}6.0\) Arkalochori (27 September 2021), the \(M_{w}6.3\) Eliassona (3 March 2021), the \(M_{w}7.0\) Samos (30 October 2020), the \(M_{w}5.1\) Parrinta (19 July 2019), the \(M_{w}6.6\) Zakynthos (25 October 2018), the \(M_{w}6.5\) Kos (20 July 2017) and the \(M_{w}6.1\) Mytilene (12 June 2017) earthquakes. These events generated intense and prolonged aftershock sequences.  
Herein, we study the temporal properties of these aftershock sequences that occurred in the area of Greece, with particular emphasis on the probability distribution of the interevent times T between successive aftershocks, in view of the ideas of non-extensive statistical physics [5; 6]. The Non-Extended Statistical Physics (NESP) is a generalization of Boltzmann-Gibbs (BG) statistical physics and is used to estimate the probability distribution of T and to determine its non-additive entropic parameter \(q\)[7], which is estimated to vary in the range 1.62-1.71. In all analyzed aftershock sequences, we recognize a crossover behavior from power-law (\(q\
eq 1\)) to exponential (\(q=1\)) scaling for larger interevent times.