As a tool to improve the state of land use management in Turkey and to better mitigate earthquake risk in the future, a microzonation project was initiated after the 1999 Kocaeli earthquake. The project had two components (a) drafting a microzonation manual [1], (b) conducting pilot case studies in the selected two regions affected by the 1999 Marmara earthquakes [2]. The main purpose of the study was to test and demonstrate the applicability of the methodology proposed in the Seismic Microzonation Manual prepared for the project. The major contributions of the study are the probabilistic assessment of the regional earthquake hazard, interpretation of the microtremor records, and interpretation of the available geological and geotechnical data based on a grid approach. All the available data was transformed to GIS format and the results are evaluated to obtain a microzonation with respect to site amplification, liquefaction susceptibility and landslide hazard. An attempt will be made to summarize the results of the pilot study conducted for the G?lcük region to give an overview of the proposed methodology.
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