S U M M A R Y We systematically analyse temporal changes of fault zone (FZ) site response along the Karadere-Düzce branch of the North Anatolian fault that ruptured during the 1999 İzmit and Düzce earthquake sequences. The study is based primarily on spectral ratios of strong motion seismic data recorded by a FZ station and a station ∼400 m away from the fault and augmented by analysis of weak ...

We perform numerical simulations of dynamic rupture processes along the North Anatolian fault in the Sea of Marmara, which poses a high risk to the nearby city of Istanbul. Several fault geometry models, nucleation points, and initial stress states are tested. The likelihood of each earthquake scenario is evaluated, and a probabilistic assessment of the ground-motion estimation is proposed. The...

The North Anatolian Fault (NAF) in the Marmara region is composed of three parallel strands all separated by ∼50 km. activity middle strand, which borders southern edge Sea, much debated because its present-day very low seismicity. This contrasts with historical, archeological and paleoseismological evidence, suggest several destructive earthquakes have occurred during last 2000 years. Our stud...