Paleoseismic history and slip rate along the Sapanca-Akyazı segment of the 1999 İzmit earthquake rupture (Mw = 7.4) of the North Anatolian Fault (Turkey)

Aynur Dikbaş; H. Serdar Akyüz; Mustapha Meghraoui; Matthieu Ferry; Erhan Altunel; Cengiz Zabcı; Robert Langridge; Cahit Çağlar Yalçıner

doi:10.1016/j.tecto.2018.04.019

Paleoseismic history and slip rate along the Sapanca-Akyazı segment of the 1999 İzmit earthquake rupture (M_w = 7.4) of the North Anatolian Fault (Turkey)

Aynur Dikbaş^*, H. Serdar Akyüz, Mustapha Meghraoui, Matthieu Ferry, Erhan Altunel, Cengiz Zabcı, Robert Langridge, Cahit Çağlar Yalçıner

^*Corresponding author for this work

Department of Geological Engineering

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

The Sapanca-Akyazı segment (SAS) is located on western part of the North Anatolian Fault (NAF) of Turkey. It was ruptured together with four other segments during the 17th August 1999 İzmit earthquake (M_w = 7.4) which caused ~145-km-long surface rupture in the east Marmara region. We conducted geomorphological investigations and 2D–3D paleoseismic trenching at 3 different sites near the Sakarya River along the SAS to obtain new data for the timing of past earthquakes and slip rate of this section of the NAF. Detailed investigations using Ground Penetrating Radar on the western bank of the Sakarya River reveal 18.5 ± 0.5 m of right-lateral cumulative offset of an alluvial terrace dated as 850 ± 11 years BP using Optically Stimulated Luminescence. The analysis of trench data from the three different sites of the SAS indicates the occurrence of four surface rupturing past earthquakes including the 1999 İzmit earthquake. According to the radiocarbon dating, these paleo-earthquakes can be correlated with the 1719 CE, 1567 CE, and 1037 CE historical earthquakes and suggest an average recurrence period between 273 and 322 years. The total dextral offset, the age of trench units and the terrace deposits together suggest a 22 ± 3 mm/yr slip rate for this portion of the NAF.

Original language	English
Pages (from-to)	92-111
Number of pages	20
Journal	Tectonophysics
Volume	738-739
DOIs	https://doi.org/10.1016/j.tecto.2018.04.019
Publication status	Published - 25 Jul 2018

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.

Funding

This study is a part of the first author's PhD study in Eurasian Institute of Earth Sciences in Istanbul Technical University and partly supported by the REL.I.E.F project (EC Contract EVG1-2002-00069 ) and TÜBİTAK project (1002 Funding Program, project no: 106Y121 ). The Nehirkent and Türkçaybaşı Municipalities excavated some of the trenches. The authors thank Nafiye Güneç Kıyak (Işık University, İstanbul) for OSL dating and Pınar Gutsuz, and Taylan Sançar for their participation in the field studies. The local people living in Nehirkent settlement are thanked for their hospitality, which made the field study at the site much easier.

Funders	Funder number
Eurasian Institute of Earth Sciences in Istanbul Technical University
TÜBİTAK	106Y121
European Commission	EVG1-2002-00069

Keywords

1999 İzmit earthquake
Earthquake recurrence
North Anatolian Fault
Paleoseismology
Sapanca-Akyazı segment
Slip-rate

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.tecto.2018.04.019

Cite this

@article{afa7b0687a774a798bc6dfb8c81c7ced,

title = "Paleoseismic history and slip rate along the Sapanca-Akyazı segment of the 1999 İzmit earthquake rupture (Mw = 7.4) of the North Anatolian Fault (Turkey)",

abstract = "The Sapanca-Akyazı segment (SAS) is located on western part of the North Anatolian Fault (NAF) of Turkey. It was ruptured together with four other segments during the 17th August 1999 İzmit earthquake (Mw = 7.4) which caused ~145-km-long surface rupture in the east Marmara region. We conducted geomorphological investigations and 2D–3D paleoseismic trenching at 3 different sites near the Sakarya River along the SAS to obtain new data for the timing of past earthquakes and slip rate of this section of the NAF. Detailed investigations using Ground Penetrating Radar on the western bank of the Sakarya River reveal 18.5 ± 0.5 m of right-lateral cumulative offset of an alluvial terrace dated as 850 ± 11 years BP using Optically Stimulated Luminescence. The analysis of trench data from the three different sites of the SAS indicates the occurrence of four surface rupturing past earthquakes including the 1999 İzmit earthquake. According to the radiocarbon dating, these paleo-earthquakes can be correlated with the 1719 CE, 1567 CE, and 1037 CE historical earthquakes and suggest an average recurrence period between 273 and 322 years. The total dextral offset, the age of trench units and the terrace deposits together suggest a 22 ± 3 mm/yr slip rate for this portion of the NAF.",

keywords = "1999 İzmit earthquake, Earthquake recurrence, North Anatolian Fault, Paleoseismology, Sapanca-Akyazı segment, Slip-rate",

author = "Aynur Dikba{\c s} and Aky{\"u}z, {H. Serdar} and Mustapha Meghraoui and Matthieu Ferry and Erhan Altunel and Cengiz Zabcı and Robert Langridge and Yal{\c c}ıner, {Cahit {\c C}ağlar}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = jul,

day = "25",

doi = "10.1016/j.tecto.2018.04.019",

language = "English",

volume = "738-739",

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T1 - Paleoseismic history and slip rate along the Sapanca-Akyazı segment of the 1999 İzmit earthquake rupture (Mw = 7.4) of the North Anatolian Fault (Turkey)

AU - Dikbaş, Aynur

AU - Akyüz, H. Serdar

AU - Meghraoui, Mustapha

AU - Ferry, Matthieu

AU - Altunel, Erhan

AU - Zabcı, Cengiz

AU - Langridge, Robert

AU - Yalçıner, Cahit Çağlar

PY - 2018/7/25

Y1 - 2018/7/25

N2 - The Sapanca-Akyazı segment (SAS) is located on western part of the North Anatolian Fault (NAF) of Turkey. It was ruptured together with four other segments during the 17th August 1999 İzmit earthquake (Mw = 7.4) which caused ~145-km-long surface rupture in the east Marmara region. We conducted geomorphological investigations and 2D–3D paleoseismic trenching at 3 different sites near the Sakarya River along the SAS to obtain new data for the timing of past earthquakes and slip rate of this section of the NAF. Detailed investigations using Ground Penetrating Radar on the western bank of the Sakarya River reveal 18.5 ± 0.5 m of right-lateral cumulative offset of an alluvial terrace dated as 850 ± 11 years BP using Optically Stimulated Luminescence. The analysis of trench data from the three different sites of the SAS indicates the occurrence of four surface rupturing past earthquakes including the 1999 İzmit earthquake. According to the radiocarbon dating, these paleo-earthquakes can be correlated with the 1719 CE, 1567 CE, and 1037 CE historical earthquakes and suggest an average recurrence period between 273 and 322 years. The total dextral offset, the age of trench units and the terrace deposits together suggest a 22 ± 3 mm/yr slip rate for this portion of the NAF.

AB - The Sapanca-Akyazı segment (SAS) is located on western part of the North Anatolian Fault (NAF) of Turkey. It was ruptured together with four other segments during the 17th August 1999 İzmit earthquake (Mw = 7.4) which caused ~145-km-long surface rupture in the east Marmara region. We conducted geomorphological investigations and 2D–3D paleoseismic trenching at 3 different sites near the Sakarya River along the SAS to obtain new data for the timing of past earthquakes and slip rate of this section of the NAF. Detailed investigations using Ground Penetrating Radar on the western bank of the Sakarya River reveal 18.5 ± 0.5 m of right-lateral cumulative offset of an alluvial terrace dated as 850 ± 11 years BP using Optically Stimulated Luminescence. The analysis of trench data from the three different sites of the SAS indicates the occurrence of four surface rupturing past earthquakes including the 1999 İzmit earthquake. According to the radiocarbon dating, these paleo-earthquakes can be correlated with the 1719 CE, 1567 CE, and 1037 CE historical earthquakes and suggest an average recurrence period between 273 and 322 years. The total dextral offset, the age of trench units and the terrace deposits together suggest a 22 ± 3 mm/yr slip rate for this portion of the NAF.

KW - 1999 İzmit earthquake

KW - Earthquake recurrence

KW - North Anatolian Fault

KW - Paleoseismology

KW - Sapanca-Akyazı segment

KW - Slip-rate

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U2 - 10.1016/j.tecto.2018.04.019

DO - 10.1016/j.tecto.2018.04.019

M3 - Article

AN - SCOPUS:85047268156

SN - 0040-1951

VL - 738-739

SP - 92

EP - 111

JO - Tectonophysics

JF - Tectonophysics

ER -

Paleoseismic history and slip rate along the Sapanca-Akyazı segment of the 1999 İzmit earthquake rupture (M_w = 7.4) of the North Anatolian Fault (Turkey)

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this

Paleoseismic history and slip rate along the Sapanca-Akyazı segment of the 1999 İzmit earthquake rupture (Mw = 7.4) of the North Anatolian Fault (Turkey)

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this

Paleoseismic history and slip rate along the Sapanca-Akyazı segment of the 1999 İzmit earthquake rupture (M_w = 7.4) of the North Anatolian Fault (Turkey)