The 20th Internatıonal Geophysical Congress and Exhibition of Turkey, Antalya, Turkey, 25 - 27 November 2013
Four active strike-slip faults unconformably cutting the morphological features along the northeastern shelf of the Marmara Sea are observed on shallow seismic and multi-beam bathymetric data. One of these NW-SE oriented faults (F1) aligns with a rupture of the North Anatolian Fault (NAF) cutting the northern slope of the Çınarcık Basin. Seismic data indicate that this fault is a post-deposition occurrence for most of the sediments on the shelf. This observation indicates that these faults have similar characteristics with the northern segment of the NAF along the Marmara Sea. Therefore, they may have a relationship with the NAF. Also many normal faults identified.in the study area using the seismic and multi-beam data. Although the seismic energy on these secondary faults is much less than those on the NAF in the Marmara Sea, these faults may produce an earthquake with an average magnitude in the long term.