A note on the effects of nonuniform spreading velocity of submarine slumps and slides on the near-field tsunami amplitudes


TRIFUNAC M., Hayir A., TODOROVSKA M.

SOIL DYNAMICS AND EARTHQUAKE ENGINEERING, vol.22, no.3, pp.167-180, 2002 (SCI-Expanded) identifier identifier

Abstract

The effects of variable speeds of spreading of submarine slides and slumps on near-field tsunami amplitudes are illustrated. It is shown that kinematic models of submarine slides and slumps must consider time variations in the spreading velocities, when these velocities are less than about 2C(T), where C-T = rootgh is the long period tsunami velocity in ocean of constant depth h. For average spreading velocities greater than similar to2C(T), kinematic models with assumed constant spreading velocities provide good approximation for the tsunami amplitudes above the source. (C) 2002 Elsevier Science Ltd. All rights reserved.