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3-D Body-Wave Velocity Structure of the Southern Aegean, Greece
Version 1
: Received: 1 August 2023 / Approved: 2 August 2023 / Online: 3 August 2023 (10:54:15 CEST)
A peer-reviewed article of this Preprint also exists.
Karakonstantis, A.; Vallianatos, F. 3D Body-Wave Velocity Structure of the Southern Aegean, Greece. Geosciences 2023, 13, 271. Karakonstantis, A.; Vallianatos, F. 3D Body-Wave Velocity Structure of the Southern Aegean, Greece. Geosciences 2023, 13, 271.
Abstract
This study delves into the Southern Aegean region where the subduction of the oceanic Mediterranean lithosphere under the Aegean continental one takes place. This region is considered one of the most active ones in the Eastern Mediterranean Sea due to intense tectonic movements in the Late Quaternary. More than 1200 manually revised events from 2018 to 2023 have been used in order to obtain the 3-D structure of body-wave velocity and VP/VS ratio to 80 km depth, through Earthquake Tomography. A series of resolution tests have been performed and demonstrated fair resolution of the derived velocity structures in area of interest. The derived anomalies of body waves (dVP, dVS), and VP/VS ratio provided important information about the Southern Aegean regional tectonics, and secondarily active faults of smaller scale (>20 km). The region is marked by significant low-velocity anomalies in the crust and uppermost mantle, beneath the active arc volcanoes. The seismicity related to the Hellenic Subduction Zone (HSZ) is connected to a low-angle positive anomaly of VP and VS, correlated to the observed intermediate-depth seismicity (H≥40 km) in this part of the study area. This result could be related to the diving HSZ slab.
Keywords
seismic tomography; lithospheric slab; southern Aegean; Hellenic Trench
Subject
Environmental and Earth Sciences, Geophysics and Geology
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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