Numerical Analysis of Tsunamis Generated by Sea Bottom Eruption in a Closed Water Basin

Abstract

After the Great East Japan Earthquake Tsunami of 2011, we became deeply concerned about estimating the supposed maximum tsunamis. Authors investigated the volcanic tsunamis in the northern part of Kagoshima bay which is conceived as one of the most serious disasters in our region. In the calculated results for the real basin, effects of the local topography and bathymetry were so large that the common nature of the volcanic tsunamis in closed basins was not necessarily clarified. The present study aims to find universal characteristics inherent in volcanic tsunamis in the closed basin using an idealistic basin model.