Jeodezi

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Browsing Jeodezi by Subject "Geology, Structural -- Turkey."

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    Network design and optimization for deformation monitoring on Tuzla fault-İzmir and its vicinity
    (Thesis (M.S.)-Bogazici University. Kandilli Observatory and Earthquake Research Institute, 2007., 2007.) Halıcıoğlu, Kerem.; Özener, Haluk.
    Seismological and geodynamic researches emphasize that the Aegean Region which comprises the Hellenic Arc, Greek mainland and western Turkey is the most seismically active region in western Eurasia. The convergence of Eurasian and African lithospheric plates forces a westward motion on the Anatolian plate relative to the Eurasia. Western Anatolia is a valuable laboratory for Earth sciences because of its complex geological structure. Izmir as a big metropolitan city in Turkey with a 2.5 million population has a great risk about big earthquakes. Unfortunately, geodynamics studies which were performed in this region are insufficient or cover large areas instead of specific faults. This study aims to perform a large scale investigation focusing on Tuzla Fault and its vicinity for better understanding of region tectonics. Tuzla Fault forms the lineament trending NESW between Menderes Town and Doganbey Cape. Moreover, Tuzla Fault is an important fault in terms of seismic activities and the distance to the highly populated metropolitan city of Izmir. In order to investigate the crustal deformation on Tuzla Fault and Izmir Bay, a geodetic network has been designed and optimizations were performed. This project produced a schedule for crustal deformation monitoring study which includes research on the tectonics of the region, network design and optimization strategies, theory and practice of processing. The study is also open for extension of study area in terms of monitoring different types of fault characteristics.
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    Recent velocity field in eastern anatolia from a combination of continuous and campaign type GPS observation
    (Thesis (M.S.) - Bogazici University. Kandilli Observatory and Earthquake Research Institute, 2013., 2013.) Farisoğulları, Ömer; Özener, Haluk.
    The tectonic structure of our country is the result of collision of Arabian, African and Eurasian plates. Deformation towards to the west of the Karlıova region, which is the conjunction of North Anatolian Fault Zone with East Anatolian Fault Zone, is caused by the strike-slip faulting along North Anatolian Fault Zone and East Anatolian Fault Zone and the deformation from this intersection area to the east is caused by the thrust faults exist in the region. In Eastern Turkey, many scientific studies have been conducted with applying geodetic methods. In this study, six epochs of data from 19 of CORS-TR stations were used and data was chosen by considering seasonal effects. GAMIT/GLOBK academic software was used to process the data and obtain velocity field of the study area. The obtained velocities of stations were combined with the velocity fields of Reilinger et al., (2006) and Aktuğ et al., (2013). The transformation process is performed by using 13 IGS stations which are mutual in the studies. Obtained velocity values vary between 3.77 mm/yr ±0.52 mm/yr and 24.94 mm/yr ±5.34 mm/yr. The results obtained show consistency with the recent tectonic structure of the region. The results of prior studies in the study area is considered and taken into account within the processing of data which made it possible to consider a long term data set. Long term data set allowed obtaining the velocity field of the area more accurately.