Unit:
Department of Geology and GeoenvirommentLibrary of the School of Science
Author:
KONSTANTAKOPOULOU EMMANOUELA
Supervisors info:
Ιωάννης Κασσάρας, Αναπληρωτής Καθηγητής, Τμήμα Γεωλογίας και Γεωπεριβάλλοντος, ΕΚΠΑ
Original Title:
Σεισμοτεκτονική Μελέτη της Σεισμικής Ακολουθίας στη Βόρεια Θεσσαλία, Απρίλιος 2021
Translated title:
Seismotectonic Study of the Seismic Sequence in Northern Thessaly, April 2021
Summary:
In the present study, the parameters of 44 focal mechanisms related to seismic events with a magnitude of M≥2.5 were calculated, of the post-seismic sequence that developed in April 2021 in the region of North Thessaly, using geological and new seismological data. The special geotectonic position of Thessaly in the area of back-arc and at the same time at the end sectors of the dextral strike-slip North Anatolian fault system (NAF), is reflected in the remarkable seismicity and the characteristics of this neotectonic regime. Using data from various sources, an attempt was made to understand and capture the characteristics of the seismic sequence, which the following seismotectonic study aims to present. The data used come more specifically from: a) The Unified Greek Seismological Network, b) The local networks that were installed on 5/3/2021, as well as on 14/3/2021, and c) data from the literature. Using the ArcMap 10.3.1 software the hitherto known information about the seismicity and tectonics of the area were captured, while at the same time with the contribution of the SeisGram2K software the stereographic projections of the focal mechanisms were extracted, and consequently the tectonic characteristics of the fault planes were determined. The results come to verify the main tectonic regime that prevails in the area, with the dominance of normal and lateral faults, but also the changes in the local stress field, which changes its orientation from NW-SE to N-S over time.
Main subject category:
Science
Keywords:
Thessaly, Tectonics, Earthquake, GIS, Focal Mechanism
