Abstract
During a large scale scenario earthquake, huge tsunami with early travel time is striked in Tobishima, Sakata City, Japan. In this study, ground shaking characterisrtics in the tsunami attack area were evaluated using microtremor measurement with high density. The strong motions in Tobishima were then estimated based on the asperity models considering the ground shaking characteristics. Furthermore, the difficult time for tsunami evacuation during the earthquake was calculated using instantaneous instrumental seismic intensity. Finally, we discussed the influence of the strong motion on the tsunami evacuation based on the relationship between the travel time and the difficult time.
