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Fault models for the Bodrum–Kos tsunamigenic earthquake (Mw6.6) of 20 July 2017 in the east Aegean Sea
Author(s)
Language
English
Obiettivo Specifico
3T. Sorgente sismica
Status
Published
JCR Journal
JCR Journal
Title of the book
Issue/vol(year)
/131 (2019)
ISSN
0264-3707
Pages (printed)
101646
Issued date
2019
Abstract
We investigate a fault model for the shallow, strong (Mw6.6) tsunamigenic earthquake of 20 July 2017 with source area in the east Aegean Sea between Bodrum peninsula (Turkey) and Kos Isl. (Greece). Fault plane solutions are consistent with the regional active tectonics indicating normal faulting striking about E–W. A relocated hypocenter of the main shock was obtained and the rupture time-space history for two alternative fault solutions dipping either to the south or to north was approached by inverting P-waves recorded at teleseismic (30°–90°) distances. In both fault solutions the seismic moment calculated corresponds to magnitude Mw=6.6 while the earthquake had total rupture duration of less than 10 s. The maximum co-seismic slip was close to the hypocenter ∼1.6m and ∼2.2m for the south and north dipping faults, respectively. Close to the surface coseismic slip of ∼0.3m was calculated. Our analysis of Sentinel satellite InSAR images showed ground deformation fringes indicating ∼13 cm vertical displacement change between the North and South coasts of the Karaada islet. This result is in line with our preference of the south dipping fault, supported primarily by GPS displacements, regional tectonics, aftershock activity and tsunami observations, although results of InSAR inversion fit equally well both solutions.
Type
article
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Papadopoulos et al 2019 (Bodrum-Kos) - J. Geodyn.pdf
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11.38 MB
Format
Adobe PDF
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