Spatio-temporal evolution and scaling laws analysis of the recent three strongest earthquakes in the Ionian Sea region during the period 2014-2019.
- 1Section of Geophysics and Geothermy, Department of Geology and Geoenvironment, National and Kapodistrian University of Athens, 15784 Panepistimiopolis, Athens, Greece (kpavlou@geol.uoa.gr, fvallian@geol.uoa.gr, gmichas@hotmail.com)
- 2Institute of Physics of Earth’s Interior and Geohazards, UNESCO Chair on Solid Earth Physics and Geohazards Risk Reduction, Hellenic Mediterranean University Research and Innovation Center, Grete, Greece
Our research aims to investigate the three recent and powerful earthquakes in the Ionian Sea region which occurred on January 26, 2014, November 17, 2015, and October 25, 2018, of magnitude Mw 6.1, Mw 6.0, and Mw 6.6 respectively using the complexity theory and the non-extensive statistical physics (NESP).
The scaling properties that have been observed in the three aftershock sequences of the recent strong earthquakes that took place in the region of Ionian islands are presented. To analyze the evolution of three aftershock sequences, we plotted the cumulative number of aftershocks N(t) over time. Additionally, we used a modified version of Omori's law to study the temporal decay of aftershock activity.
Based on non-extensive statistical physics, the analysis of interevent times distribution suggests that the system is in an anomalous equilibrium, with a crossover from anomalous (q>1) to normal (q=1) statistical mechanics for large interevent times. The obtained values of q indicate that the system has either one or two degrees of freedom. Furthermore, the migration of aftershock zones can be scaled as a function of the logarithm of time. This scaling is discussed in terms of rate-strengthening rheology, which governs the evolution of the afterslip process.
Acknowledgements
The present study is co-funded by the Special Account for Research Grants (S.A.R.G.) of the National and Kapodistrian University of Athens.
How to cite: Pavlou, K., Vallianatos, F., and Michas, G.: Spatio-temporal evolution and scaling laws analysis of the recent three strongest earthquakes in the Ionian Sea region during the period 2014-2019., EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-11734, https://doi.org/10.5194/egusphere-egu24-11734, 2024.
