Abstract
As a result of sediment entrainment by the experimental tsunami waves on the wave-dominated shallow marine geomorphology, a sediment-gravity flow occurred at the lower foreshore to the upper shoreface by tsunamigenic oscillatory flows in the experimental flume. Collision of run-up currents on the subaerial region and ebb currents with submarine erosion cyclically occurred by the tsunami, providing suspended sediments continuously to the downslope-migrating sediment gravity flow on the shoreface. Considering the recurrence intervals of the large tsunamis, the tsunamigenic turbidity currents could be significant as an origin of widely distributed turbidites in the regions of active plate margins.
