Intelligent Earth system sensing, scientific enquiry and discovery


A study on the investigation of crustal deformation along the Iznik-Gemlik segment of the estern Part of North Anatolian Fault System

Onur Yilmaz (1), Cengiz Zabci (2), Kerem Halicioglu (1), Bulent Turgut (1), Semih Ergintav (1)
(1) Bogazici University Earthquake Research Institute, (2) Istanbul Technical University Geological Engineering Department

GNSS observations on the western part of the North Anatolian Fault Zone (NAFZ) have been carrying out since the beginning of 1990s. August 17, 1999, Izmit earthquake (Mw= 7.4)  excited more scientific  attention on this area. Bogazici University Kandilli Observatory and Earthquake Research Institute (KOERI), Geodesy Department has been continually collected GNSS data on the Iznik-Mekece segment, which is located at the eastern part of the Marmara  region, since 1994. We accumulated a significant time-series data about the region for 20 years.


There is limited data on the palaeoseismicity of the southern strand of the North Anatolian Fault. Moreover, GPS-based elastic block models suggest a higher activity on the Gemlik-İznik segment then the eastern part. In this study, we are planning to monitor the area through the Iznik-Gemlik segment by GNSS technique with fault-normal/fault-parallel directions and to determine the velocities and strain accumulation arising from crustal deformation. With addition of 4 new network points to available 4 sites, we will have a better understanding on the crustal deformation along this particular section of the fault.

Scientific Topic: 
Geodynamics and the earthquake cycle (Kosuke Heki, Janusz Bogusz)
Poster location: