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Summary of Proposal GEO0988

TitleData acquisition for GEO's Istanbul Geohazard Supersite
Investigator CAKIR, Ziyadin - Istanbul Technical University, Geology
Team Member
Dr Ergintav, Semih - Tubitak MAM, Earth and Marine Research Institute
SummaryThe 1999 disastrous Izmit earthquake (Mw=7.4) was not a surprise because westward migrating earthquakes that broke ~1000 km-long section of North Anatolian Fault (NAF) in a manner of falling dominos had already arrived nearby Izmit. Another large and destructive earthquake is now expected to occur further west along the North Anatolian fault under the Sea of Marmara 20 km south of Istanbul, one of the most populous and rapidly growing cities of Europe. Historical documents going back to two millennia indicate that many destructive earthquakes stroke the city of Istanbul since the northern segment of the NAF under the Marmara Sea accommodates most of the plate motion between Anatolia and Eurasia. The probability of a large earthquake to strike Istanbul again is estimated to be about 65% over the next 20 years. The metropolitan area of Istanbul and the eastern Marmara region that covers the western termination of the 1999 Izmit earthquake rupture will be studied using TerraSAR-X Scansar and Stripmap data on two tracks. The objectives are to measure the tectonic strain accumulation due to plate motions, search for unknown faults to improve and spatially refine seismic hazard maps, reveal surface deformation caused by earthquakes and to constrain their focal mechanisms,·to better determine the postseismic deformation of the 1999 Izmit earthquake to understand the earthquake cycle, and monitor landslides and subsidence.

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