Evaluation of Strong Motion and Difficult Time for Tsunami Evacuation with High Density in Coastal Areas, Miyazaki City, Japan, during a Scenario Earthquake with M_W9.0 along the Nankai Trough based on the SMGA Models considering Site Amplification and Phase Effects

Abstract

During a scenario earthquake with M_W9.0 along the Nankai Trough, not only strong motion but also huge tsunami is predicted in coastal area, Miyazaki City, Japan. In this study, first, based on temporary seismic observation records with high dense spatial location in the areas of interest, site amplification and phase effects were evaluated. Seismic waveforms in the areas of interest were then predicted based on the SMGA models considering the empirical site amplification and phase effects. Using the detailed distribution of several indices due to the predicted seismic waveforms, finally, we discussed the influence which the action of the strong motion has on tsunami evacuation.