Characteristics of Propagation of Tsunami Caused by Seabed Deformation in Uniform Depth

Abstract

The purpose of this paper was to make clear relationships between tsunami generating and its propagating and a seabed deformation. In particular, we have studied how the deformation velocity and the deformation width affect the process of tsunami propagation. For the purpose of our work, numerical simulations of tsunami generated by the seabed deformation were carried out in three kinds of seabed deformations. As a result, when the width of seabed deformation became to more than 100 km, tsunami heights decayed to about 40% than its tsunami maximum heights. Further, it was found that the decay rate of tsunami height of negative waves is lower than that of positive waves. Moreover, the negative wave propagated with the wave height almost equal to the maximum tsunami height.