Tsunami potential source in the eastern Sea of Marmara (NW Turkey), along the North Anatolian Fault system

Abstract Based on morphobathymetric and seismic reflection data, we studied a large landslide body from the eastern Sea of Marmara (NW Turkey), along main strand North Anatolian Fault, one most seismically active geological structures Earth. Due to its location dimensions, sliding may cause tsunamis in case failure possibly induced by an earthquake. This could affect heavily coasts densely populated Istanbul Metropolitan area, with exposed cultural heritage assets. After geometrical description landslide, thanks high-resolution marine geophysical simulated numerically possible effects massive mobilization basal displacement surface. Results, within significant uncertainties linked dimensions kinematics mass, suggest generation exceeding 15–20 m broad coastal sector Marmara. Although creeping processes or partial collapse lower associated tsunami risk, detection stresses need for collecting more geological/geophysical data region better constrain hazards feasibility specific emergency plans.