1. Αποθετήριο Παραδοτέων Υποτρόφων Δράσεων ΕΣΠΑ Τριτοβάθμιας Εκπαίδευσης 2017-2023
2. Όλο το Αποθετήριο
3. Ερευνητικές ομάδες

Τύπος:	Ανακοίνωση σε συνέδριο
Τίτλος:	Variations of the earthquake diffusion rates in the Western Gulf of Corinth (Greece)
Συγγραφέας:	[EL] Μίχας, Γεώργιος[EN] Michas, George [EL] Καπετανίδης, Βασίλειος[EN] Kapetanidis, Vasilis [EL] Καβύρης, Γεώργιος[EN] Kabyris, Georgios [EL] Βαλλιανάτος, Φίλιππος[EN] Vallianatos, Filippos
Ημερομηνία:	29/04/2021
Περίληψη:	Earthquake diffusion is frequently observed in the spatiotemporal evolution of seismic clusters and regional seismicity, a characteristic that is attributed to a triggering mechanism, such as fluid flow, aseismic creep and/or stress transfer effects. In this work, we study the earthquake diffusion properties in the Western Gulf of Corinth (central Greece), an area that presents high extension rates, moderate to large magnitude earthquakes, intense microseismicity and frequent seismic swarms. We focus on the period 2013–2014 that is characterized by intense background microseismic activity along with significant seismic sequences. More specifically, the latter include the 2013 Helike swarm, the 2014 seismic sequence between Nafpaktos and Psathopyrgos, which culminated with an Mw 4.9 event on 21 September 2014, as well as moderate magnitude events that were followed by aftershock sequences. In the herein analysis, we employ a relocated earthquake catalogue of ~9000 events which delineates the activated areas during the study period in high-resolution. We consider the most significant seismic sequences and calculate their respective spatial correlation histograms and the evolution of the mean squared distance of the hypocenters with time, in order to study the earthquake diffusion rates and possible variations that might be related to the triggering mechanisms of seismicity. Our results demonstrate a weak earthquake diffusion process, analogous to subdiffusion within a stochastic framework, for the seismic sequences under consideration, providing further evidence for slow earthquake diffusion in regional and global seismicity. In addition, the earthquake diffusion rates exhibit variations that can be associated with the triggering mechanism. In particular, seismic sequences which are related with pore-fluid pressure diffusion present considerably higher diffusion rates than mainshock/aftershock sequences or the background activity. Such results may provide novel constraints on the triggering mechanisms of clustered seismic activity based on the study of the earthquake diffusion rates.
Γλώσσα:	Αγγλικά
Σελίδες:	2
DOI:	10.5194/egusphere-egu21-5282
Θεματική κατηγορία:	[EL] Γεωφυσική[EN] Geophysics
Κάτοχος πνευματικών δικαιωμάτων:	© 2021 The Author(s)
Όροι και προϋποθέσεις δικαιωμάτων:	This work is distributed under the Creative Commons Attribution 4.0 License
Διατίθεται ανοιχτά στην τοποθεσία:	https://meetingorganizer.copernicus.org/EGU21/EGU21-5282.html
Ηλεκτρονική διεύθυνση του τεκμηρίου στον εκδότη:	https://meetingorganizer.copernicus.org/EGU21/EGU21-5282.html
Τίτλος πηγής δημοσίευσης:	EGU21 General Assembly session SM – Seismology. SM6.1 – Earthquake swarms and complex seismic sequences driven by transient forcing in tectonic and volcanic regions
Σελίδες τεκμηρίου (στην πηγή):	EGU21-5282
Όνομα εκδήλωσης:	EGU21- European Geosciences Union General Assembly 2021
Τοποθεσία εκδήλωσης:	Online
Ημ/νία έναρξης εκδήλωσης:	19/04/2021
Ημ/νία λήξης εκδήλωσης:	30/04/2021
Σημειώσεις:	The present research is co-financed by Greece and the European Union (European Social Fund- ESF) through the Operational Programme «Human Resources Development, Education and Lifelong Learning 2014-2020» in the context of the project “The role of fluids in the seismicity of the Western Gulf of Corinth (Greece)” (MIS 5048127).
Εμφανίζεται στις συλλογές:	Ερευνητικές ομάδες