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Τύπος:	Αναρτημένη ανακοίνωση (poster)
Τίτλος:	Application of superstatistics in Hellenic seismicity
Συγγραφέας:	[EL] Ηλιόπουλος, Άγγελος[EN] Iliopoulos, Aggelos [EL] Χορόζογλου, Δημήτριος-Ευστάθιος[EN] Chorozoglou, Dimitrios-Efstathios [EL] Κουρούκλας, Χρήστος[EN] Kourouklas, Christos [EL] Μαγγίρα, Ουρανία[EN] Mangira, Ourania [EL] Παπαδημητρίου, Ελευθερία[EN] Papadimitriou, Eleftheria
Ημερομηνία:	Σεπ-2018
Περίληψη:	The complex turbulent dynamics of seismogenesis in the area of Greece is investigated, applying the recently developed superstatistics theory [1] to three earthquake interevent time series. The corresponding three data sets are subsets of the regional earthquake catalogue compiled in the Seismological Station of Geophysics Department, Aristotle University of Thessaloniki and concern: 1221 earthquakes with M>5.2, occurred during 1911–2017; 576 earthquakes with M>5.5, during 1911– 2017 and 114 earthquakes with M>6.5, in the period of 1845–2017. In the superstatistics’ framework, the Hellenic seismogenesis can be seen as a driven nonequilibrium system that is spatially consisted of smaller subregions (e.g. earthquake zones) exhibiting spatio-temporal fluctuations of an intensive quantity β (e.g. stress field). Then, its complex behavior can be efficiently described by a superposition of different dynamics on variable time scales and in particular two considerably distinctive time scales, τ and T, corresponding to fast (relaxation time to local equilibrium) and slow dynamics (the long time scale in which the intensive quantity β fluctuates). In order to test this hypothesis, we adopt the methodology described in [2] investigating whether this time scale separation exists, as well as if the slowly varying stochastic process β(t) falls into the category of the three major universal classes of superstatistics, namely χ2 (related to Tsallis statistics), inverse χ2 and log-normal superstatistics. In particular, we estimate the superstatistical time scales τ (exponential decay of autocorrelation functions) and T (the value for which the flatness coefficient equals to 3) and their ratio T/τ. Then, we evaluate the probability density of the superstatistical process β(t) and compare it with χ2, inverse χ2 and lognormal distributions generated with the same length, mean and variance as β(t).
Γλώσσα:	Αγγλικά
Τόπος δημοσίευσης:	Thessaloniki, Greece
Σελίδες:	1
DOI:	10.5281/zenodo.4113835
Θεματική κατηγορία:	[EL] Γεωφυσική[EN] Geophysics
Κάτοχος πνευματικών δικαιωμάτων:	© 2018 The Author(s)
Όροι και προϋποθέσεις δικαιωμάτων:	This poster is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
Ηλεκτρονική διεύθυνση του τεκμηρίου στον εκδότη:	https://zenodo.org/records/4113836
Ηλεκτρονική διεύθυνση περιοδικού:	http://ccs2018.web.auth.gr/ccs2018-e-bag
Τίτλος πηγής δημοσίευσης:	CCS2018 Book of Abstracts
Σελίδες τεκμηρίου (στην πηγή):	187
Όνομα εκδήλωσης:	Conference of Complex Systems – CCS2018
Τοποθεσία εκδήλωσης:	Thessaloniki, Greece
Ημ/νία έναρξης εκδήλωσης:	23/09/2018
Ημ/νία λήξης εκδήλωσης:	28/09/2018
Σημειώσεις:	This research forms part of the project ‘’Development and Application of Time-Dependent Stochastic Models in selected regions of Greece for assessing the Seismic Hazard” (MIS 5004504), which is implemented through the Operational Program "Human Resources Development, Education and Lifelong Learning" and is co-financed by the European Union (European Social Fund) and Greek national funds
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