Monitoring aseismic creep trends in the Ä°smetpaşa and Destek segments throughout the North Anatolian Fault (NAF) with a large-scale GPS network

Hasan Hakan Yavaşoǧlu*, Mehmet Nurullah Alkan, Serdar Bilgi, Öykü Alkan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The North Anatolian Fault Zone (NAFZ) is an intersection area between the Anatolian and Eurasian plates. The Arabian Plate, which squeezes the Anatolian Plate from the south between the Eurasian Plate and itself, is also responsible for this formation. This tectonic motion causes the Anatolian Plate to move westwards with almost a 20mmyr-1 velocity, which has caused destructive earthquakes in history. Block boundaries that form the faults are generally locked to the bottom of the seismogenic layer because of the friction between blocks and are 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. Additionally, it is a rare event in the world located in two reported segments along the North Anatolian Fault (NAF), which are ?Ismetpasa and Destek. In this study, we established GPS networks covering those segments and made three campaigns between 2014 and 2016. Considering the long-term geodetic movements of the blocks (Anatolian and Eurasian plates), surface velocities and fault parameters are calculated. The results of the model indicate that aseismic creep still continues with rates of 13:2± 3:3mmyr-1 at ?Ismetpasa and 9:6±3:1mmyr-1 at Destek. Additionally, aseismic creep behavior is limited to some depths and decays linearly to the bottom of the seismogenic layer at both segments. This study suggests that this aseismic creep behavior will not prevent medium- to large-scale earthquakes in the long term.

Original languageEnglish
Pages (from-to)25-40
Number of pages16
JournalGeoscientific Instrumentation, Methods and Data Systems
Issue number1
Publication statusPublished - 26 Feb 2020

Bibliographical note

Publisher Copyright:
© Author(s) 2020.


Financial support. This research has been supported by the Coor- Acknowledgements. This paper is based on the PhD thesis of Mehmet Nurullah Alkan with the title “Kuzey Anadolu Fayı (KAF) Bolu-Çankırıve Amasya Bölgelerindeki Asismik Tektonik Yapının Periyodik GPS Ölçümleri ile Belirlenmesi” (Determination of Aseismic Tectonic Structure in the Bolu-Çankırıand Amasya Regions Through the North Anatolian Fault (NAF) with Periodic GPS Observations) and is supported by the Coordinatorship of Scientific Research Projects (BAP) of Hitit University (project no. MYO19001.14.001), Istanbul Technical University (project ID: 425, code: 38146), and Afyon Kocatepe University (project no. 38146). We would also like to thank all participants in this project who helped during the field and software processes. In addition, we appreciate the equipment and software support of Afyon Kocatepe University and Ibrahim Tiryakioglu. The maps in this paper were created by using the GMT scripts provided by TDEFNODE software (McCaffrey 2002, html, last access: 20 December 2018; Wessel and Smith, 1995).

FundersFunder number
Bolu-Çankırıve Amasya Bölgelerindeki Asismik Tektonik Yapının Periyodik
Hitit UniversityMYO19001.14.001
Afyon Kocatepe Üniversitesi
Istanbul Teknik Üniversitesi38146, FEN.B˙L.16


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