Preparation of a source model for the Eastern Marmara Region along the North Anatolian fault segments and probabilistic seismic hazard assessment of Düzce province

Cambazoğlu, Selim
The North Anatolian Fault System is one of the most important active strike-slip fault systems in the world. The August 17, 1999 and November 12, 1999 earthquakes at Kocaeli and Düzce are the most recent devastating earthquakes. The study area lies in the Eastern Marmara Region and is bounded by the 28.55-33.75 E and 40.00-41.20 N, latitude and longitude coordinates, respectively. There are numerous studies conducted in the study area in terms of active tectonics and seismicity, however studies are scale dependent. Therefore, a comprehensive literature survey regarding active tectonics of the region was conducted and these previous studies were combined with the lineaments extracted from 10 ASTER images via principle component analysis manual extraction method. Therefore, a line seismic source model for the Eastern Marmara region was compiled mainly based on major seismic events of instrumental period. The seismicity of these line segments were compared with the instrumental period earthquake catalogue compiled by Kandilli Observatory and Earthquake Research Institute with a homogeneous magnitude scale between 1900 and 2005. Secondary event and completeness of this catalogue was checked. The final catalogue was matched with the compiled seismic source for historical seismicity and source-scenario-segment-weight relationships were developed. This developed seismic source model was tested by a probabilistic seismic hazard assessment for Düzce city center by utilizing four different ground motion prediction equations. It was observed that Gutenberg-Richter seismicity parameter ‘b’ does not have significant effect over the model, however change in the segmentation model have a low but certain influence.


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The North Anatolian Fault (NAF) is one of the world’s largest active continental strikeslip faults, and forms the northern margin of the Anatolian plate. Although its geologic and geomorphologic features are well defined, crustal deformation and associated seismicity around central segment of the NAF is relatively less-known. In this study, we analyzed locations and focal mechanisms of 172 events with magnitude ≥ 3, which are recorded by 39 broadband seismic stations deployed by the North Anatolian Passive ...
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Gemlik County is located in the Marmara Region (NW Turkey), which has been affected by destructive earthquakes sourced from North Anatolian Fault System throughout its history. The bulk of the settlement rests on alluvial deposits of the Gemlik pull-apart basin. So, it is vital to investigate the foundation soils in this basin and the response of them to earthquakes. Many earthquake codes were established by the authorities in different countries of the world to estimate the possible ground shaking and seis...
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Since there are three major earthquake lines on Anatolia which are North Anatolian Fault, East Anatolian Fault and West Anatolian Fault, earthquake is one of the most important issue for Turkey. Following the damages of Kocaeli (1999) Earthquake to our economy, importance of earthquake insurance was understood and therefore Compulsory Earthquake Insurance was put into action. However, for the calculation of insurance premiums which were specified by Turkish Catastrophe Insurance Pool (TCIP), only type of bu...
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The North Anatolian Fault (NAF) is one of the world's largest continental strike-slip faults. Despite much geological work at the surface, the deep structure of the NAF is relatively unknown. The North Anatolian Fault Passive Seismic Experiment is mainly focused on the lithospheric structure of this newly coalescing continental transform plate boundary. In the summer of 2005, we deployed 5 broadband seismic stations near the fault to gain more insight on the background seismicity, and in June 2006 we deploy...
Citation Formats
S. Cambazoğlu, “Preparation of a source model for the Eastern Marmara Region along the North Anatolian fault segments and probabilistic seismic hazard assessment of Düzce province,” M.S. - Master of Science, Middle East Technical University, 2012.