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No significant steady state surface creep along the North Anatolian Fault offshore Istanbul: Results of 6 months of seafloor acoustic ranging ArchiMer
Sakic, P.; Piete, Helene; Ballu, V.; Royer, J. -y.; Kopp, H.; Lange, D.; Petersen, F.; Ozeren, M. S.; Ergintav, S.; Geli, Louis; Henry, P.; Deschamps, Anne.
The submarine Istanbul-Silivri fault segment, within 15 km of Istanbul, is the only portion of the North Anatolian Fault that has not ruptured in the last 250 years. We report first results of a seafloor acoustic ranging experiment to quantify current horizontal deformation along this segment and assess whether the segment is creeping aseismically or accumulating stress to be released in a future event. Ten transponders were installed to monitor length variations along 15 baselines. A joint least squares inversion for across-fault baseline changes, accounting for sound speed drift at each transponder, precludes fault displacement rates larger than a few millimeters per year during the 6 month observation period. Forward modeling shows that the data better...
Tipo: Text Palavras-chave: Seafloor geodesy; North Anatolian Fault; Marmara Sea; Acoustic ranging.
Ano: 2016 URL:
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