Seismic velocities on the Nova Scotian margin to estimate gas hydrate and free gas concentrations

► Wide-angle reflection data was obtained from ocean-bottom seismometers. ► We utilized travel-time tomography for 2-D velocity models. ► Estimates and distribution of gas hydrate on the Scotian margin, Eastern Canada. ► The gas hydrate distribution is restricted to 100 m thick layer above BSR. ► Gas hydrate concentrations decrease with distance to channel structures.