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Discussion papers
https://doi.org/10.5194/gi-2019-24
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gi-2019-24
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 02 Oct 2019

Submitted as: research article | 02 Oct 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Instrumentation, Methods and Data Systems (GI).

Monitoring aseismic creep trend in Ismetpasa and Destek segments throughout the NAF with a large scale GPS network

Hasan Hakan Yavaşoğlu1, Mehmet Nurullah Alkan2, Serdar Bilgi1, and Öykü Alkan3 Hasan Hakan Yavaşoğlu et al.
  • 1ITU, Dept. of Geomatics Engineering, Maslak, Istanbul, Turkey
  • 2Hitit University, Osmancık MYO, 19030, Corum, Turkey
  • 3ITU, Graduate School of Science Engineering and Technology, Maslak, Istanbul, Turkey

Abstract. North Anatolian Fault Zone (NAFZ) is an intersection area between Anatolian and Eurasian plates. Also another plate is responsible for this formation, Arabian plate, which squeezes the Anatolian plate from the south between Eurasian plate and itself. Block boundaries, forming the faults, generally locked to the bottom of seismogenic layer because of the friction between blocks, and responsible for these discharges. However, there are also some unique events observed around the world, which may cause partially or fully free slipping faults. This phenomenon is called aseismic creep, and may occur through the entire seismogenic zone or at least to some depths and is a rare event in the world, with two reported segments along the North Anatolian Fault (NAF): Ismetpasa and Destek.

In this study, we established GPS networks covering these segments and made three campaigns between 2014–2016. Considering the long term geodetic movements of the blocks (Anatolian and Eurasian plates), previous studies for each segment, calculated surface velocities and fault parameters; aseismic creep still continues to some rates, 13.2±3.3 mm/year at Ismetpasa and 9.6±3.1 mm/year at Destek. Results indicates that this aseismic creep behavior will not prevent a medium-large scale earthquake in the long term.

Hasan Hakan Yavaşoğlu et al.
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Hasan Hakan Yavaşoğlu et al.
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Short summary
This study has been carried out within the scope of the project supported by ITU, Afyon Kocatepe and Hitit Universities. The data were obtained from annual GPS campaigns. With this study, the actual velocity field of the region was revealed and the deformations of the region were tried to be determined. In particular, the creep, which is a rare phenomenon in tectonic, was studied in order to understand its mechanism and whether it is in the region or not.
This study has been carried out within the scope of the project supported by ITU, Afyon Kocatepe...
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