Unit:
Department of Geology and GeoenvirommentLibrary of the School of Science
Author:
ANYFANTI ELENI-APOSTOLIA
Supervisors info:
Βαλλιανάτος Φίλιππος, Καθηγητής, Τμήμα Γεωλογίας και Γεωπεριβάλλοντος, Σχολή Θετικών Επιστημών
Original Title:
A Non-Extensive Statistical Physics view to the temporal properties of aftershocks related to major subduction zone earthquakes worldwide
Translated title:
A Non-Extensive Statistical Physics view to the temporal properties of aftershocks related to major subduction zone earthquakes worldwide
Summary:
In this work, we analyze the statistical properties of the temporal evolution of aftershock sequences that followed recent large subduction zone earthquakes worldwide from January 1976 to October 2020. We analyzed 44 aftershock sequences generated by mainshocks of M 7.0 and above, with focal depths less than 70km. To model their temporal behavior, we estimate the parameters of the modified Omori law. Their temporal scaling properties are further studied by looking into the probability distribution of the interevent times between the successive aftershocks, in terms of Non-Extensive Statistical Physics (NESP). Τhe statistical parameter qM estimated is related to the frequency-magnitude distribution and could be used as an auxiliary factor to characterize the physical condition of the seismic region because its changes are related with the release rate of the energy. It is also demonstrated the applicability of NESP in the cumulative distribution functions of interevent times and the presence of a crossover behavior from power-law (q≠1) to exponential (q=1) scaling for greater interevent times. A discussion of the observed crossover behavior in terms of superstatistics is further provided.
Main subject category:
Science
Keywords:
Subduction Zone, Megathrust Earthquake, Earthquake Catalog, Aftershock Sequences, Interevent Times, Gutenberg-Richter Law, Omori Law, Non-Extensive Statistical Physics (NESP), Probability Distribution, Complex System, Tsallis Entropy
