Coseismic (20 July 2017 Bodrum-Kos) and paleoseismic markers of coastal deformations in the Gulf of Gökova, Aegean Sea, SW Turkey

Yıldırım, Cengiz; Aksoy, Murat Ersen; Özcan, Orkan; İşiler, Mehmet; Özbey, Volkan; Çiner, Attila; Salvatore, Peter; Sarıkaya, Mehmet Akif; Doğan, Turhan; Ilkmen, Erhan; Schneiderwind, Sascha

doi:10.1016/j.tecto.2021.229141

Cited by 5 publications

(19 citation statements)

References 55 publications

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“…The observed data were reduced to the MSL, by applying tidal corrections at the time of surveys and calculating the residual sea level, using a tide gauge data set acquired from the nearest Marmaris station (https://tudes.harita.gov.tr). The amplitude of the local tide was ~0.3 m on the southwestern coast of Turkey (Yıldırım et al, 2022).…”

Section: Methodsmentioning

confidence: 99%

“…Based on the data from the archeological sites of Fethiye, Anzidei et al (2011) suggested that the contribution of GIA to RSL changes played a minor role; further, over the last 2300 years, tectonic subsidence contributed significantly to the current topography of the southwestern coast of Turkey. Notably, the geographic position system (GPS) measurements and sea level data acquired from the Bodrum tide gauge (southwestern coast of Turkey) confirmed no significant vertical land motion in the region between 1993 and 2009 (Yildiz et al, 2013), while the GIA was also negligible (Yıldırım et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Novel insights into the sea level evolution along the coast of Bozburun Peninsula (Turkey): A study on submerged Bronze Age harbor in Çamçalık

et al. 2022

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A recent discovery of a Bronze Age harbor site in Çamçalık provides new data for the relative sea level history along the coast of the Bozburun Peninsula over the last 3600 years. In this study, we compared the new and previously published data from nearby sites to determine the long-term relative sea level changes. Further comparison of the observed sea level data and newly produced glacial isostatic adjustment (GIA) models clarified the tectonic contribution to the relative sea level changes. Our results suggest a nonlinear tectonic subsidence trend in the coastal zone since 3600 B.P. The increase in the relative sea level accelerated over the last 1400 years, mostly due to the seismic events controlled by the tectonic regime of the southeastern Aegean Sea. We can conclude that, as in the past, this active tectonic process will have a major impact on the future sea level evolution of the coastal sector of the Bozburun Peninsula. Notably, our study can be used to understand the historical trend of sea level rise while providing a foundation for future trend prediction.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel insights into the sea level evolution along the coast of Bozburun Peninsula (Turkey): A study on submerged Bronze Age harbor in Çamçalık

et al. 2022

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“…However, the so-called northeastsouthwest-trending left-lateral fault zone in the Gökova basin is also named as the GFZ or the Gökova Transfer Fault ( 2019) indicate that the east-west trending south-dipping fault is the source of the 2017 main shock, supported by the GPS data, regional tectonics, aftershocks, and tsunami observations, although the InSAR result ts equally well both north-and southdipping faulting. In a recent study by Yıldırım et al (2022), they reported that the Karaada Islet, located just north of the main shock, was uplifted based on the change of the shorelines and notch levels during the 2017 Bodrum earthquake, and concluded that the earthquake was associated with a south-dipping normal fault.…”

Section: Introductionmentioning

confidence: 99%

Tectonic and velocity structure of the Gulf of Gökova, southwest Anatolia, determined by double-difference seismic tomography: the 20 July 2017 Mw6.5 Bodrum Earthquake

Özdemirli-Esat¹,

Doğanay-Özkan²,

Esat

2022

Preprint

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The 20 July 2017 Mw6.5 Bodrum main shock that occurred in the Gulf of Gökova is one of the largest earthquakes in the north-south extensional Aegean region. In this study, we generated the first three-dimensional local earthquake tomography for the Gökova region using the double-difference tomography algorithm to provide a contribution to discussions on the source fault of the main shock. The 2500 earthquake records of the magnitude ≥ 2.3 between 01 January 2017 and 31 December 2017 were chosen from the 18 strong-motion accelerometer and 12 weak-motion seismometer stations. The P- and S-wave velocity models and Vp/Vs ratio model of the study area were created, and 1442 earthquakes were relocated. With the help of seismic tomographic imaging, we concluded that the main shock occurred on the south-dipping Gökova Fault Zone, not on the so-called north-dipping fault plane suggested in some studies. We also determined that some earthquakes that occurred in 2017 were associated with a north-dipping normal fault observed up to 10 km depth immediately north of the Gökova Fault Zone. Additionally, the Datça-Kale Main Breakaway Fault, which separates the sedimentary cover and the basement rocks, was also determined in the tomographic profiles. The kinematic analysis of moment tensor solutions of the earthquakes with magnitudes greater than 4, twenty-one of which were generated in this study, is consistent with the north-south extensional tectonic regime in the Aegean region.

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“…There are different opinions about whether the main shock occurred on a south- (Kiratzi and Koskosidi, 2018;Ocakoğlu et al, 2018;Saltogianni et al, 2018;Tiryakioğlu et al, 2018;Papadopoulos et al, 2019;Yıldırım et al, 2022) or north-dipping fault (Karasözen et al, 2018;Ganas et al, 2019;Konca et al, 2019, Sboras et al, 2020. Kiratzi and Koskosidi (2018) suggest that the Bodrum-Kos earthquake ruptured a 50°±9° south-dipping east-west trending normal fault with the dimensions of the 30 km along strike and 15 km along dip.…”

Section: Introductionmentioning

confidence: 99%

“…Papadopoulos et al (2019) indicate that the east-west trending south-dipping fault is the source of the 2017 main shock, supported by the GPS data, regional tectonics, aftershocks, and tsunami observations, although the InSAR result ts equally well both north-and southdipping faulting. In a recent study by Yıldırım et al (2022), they reported that the Karaada Islet, located just north of the main shock, was uplifted based on the change of the shorelines and notch levels during the 2017 Bodrum-Kos earthquake, and concluded that the earthquake was associated with a southdipping normal fault.…”

Section: Introductionmentioning

confidence: 99%

Seismotectonics of the Gulf of Gökova, southwest Anatolia, using double-difference seismic tomography, earthquake relocation, and moment tensor solutions: the 20 July 2017 Mw6.5 Bodrum-Kos Earthquake

Özdemirli-Esat¹,

Doğanay-Özkan²,

Esat

2022

Preprint

View full text Add to dashboard Cite

The 20 July 2017 Mw6.5 Bodrum-Kos main shock that occurred in the Gulf of Gökova is one of the largest earthquakes in the north-south extensional Aegean region. In this study, we generated the first three-dimensional local earthquake tomography for the Gökova region using the double-difference tomography algorithm to provide a contribution to discussions on the source fault of the main shock. The 2500 earthquake records of the magnitude ≥ 2.3 between 01 January 2017 and 31 December 2017 were chosen from the 19 strong-motion accelerometer and 11 weak-motion seismometer stations. The P- and S-wave velocity models and Vp/Vs ratio model of the study area were created, and 1442 earthquakes were relocated. With the help of seismic tomographic imaging, we concluded that the main shock occurred on the south-dipping Gökova Fault Zone, not on the so-called north-dipping fault plane suggested in some studies. We also determined that some earthquakes that occurred in 2017 were associated with a north-dipping normal fault observed up to 10 km depth immediately north of the Gökova Fault Zone. Additionally, the Datça-Kale Main Breakaway Fault, which separates the sedimentary cover and the basement rocks, was also determined in the tomographic profiles. The kinematic analysis of moment tensor solutions of the earthquakes with magnitudes greater than 4, twenty-one of which were generated in this study, is consistent with the north-south extensional tectonic regime in the Aegean region.

show abstract

Coseismic (20 July 2017 Bodrum-Kos) and paleoseismic markers of coastal deformations in the Gulf of Gökova, Aegean Sea, SW Turkey

Cited by 5 publications

References 55 publications

Novel insights into the sea level evolution along the coast of Bozburun Peninsula (Turkey): A study on submerged Bronze Age harbor in Çamçalık

Novel insights into the sea level evolution along the coast of Bozburun Peninsula (Turkey): A study on submerged Bronze Age harbor in Çamçalık

Tectonic and velocity structure of the Gulf of Gökova, southwest Anatolia, determined by double-difference seismic tomography: the 20 July 2017 Mw6.5 Bodrum Earthquake

Seismotectonics of the Gulf of Gökova, southwest Anatolia, using double-difference seismic tomography, earthquake relocation, and moment tensor solutions: the 20 July 2017 Mw6.5 Bodrum-Kos Earthquake

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