Effectiveness of Real-Time Near-Field Tsunami Inundation Forecasts for Tsunami Evacuation in Kushiro City, Hokkaido, Japan - Post-Tsunami Hazard: Reconstruction and Restoration - page 163

Fig. 11.6 Tsunami hazard map for Kushiro City. Color areas indicate tsunami fl ow depth from the
worst-case tsunami scenario for Kushiro City. Locations of tsunami evacuation buildings and areas
are shown on the map

of tsunami hazard awareness is essential to educate the residents to take the
appropriate actions in the event of a tsunami (Imamura 2009 ). One way to increase
or maintain the awareness of a tsunami hazard is by periodically conducting tsu-
nami drills in tsunami-prone areas (Imamura 2009 ).

11.5 Hypothetical Earthquake (Mw 8.7) Off the Pacifi c

Coast of Hokkaido

For the purpose of a tsunami evacuation drill in Kushiro City, we used a hypothetical
great earthquake (Mw 8.7) in the subduction zone off the pacifi c coast of Hokkaido.
The earthquake fault parameters are strike = 250°, dip = 10°, rake =90°, depth = 10 km,
fault length = 200 km, and fault width = 100 km. The initial sea surface deformation
of this hypothetical earthquake is shown in Fig. 11.7 .
The fault model of the hypothetical earthquake fault model (Mw 8.7) is used to
simulate tsunami waveforms at the near-shore locations (Fig. 11.8 ). Then, the
tsunami waveforms are used to fi nd the site-specifi c best scenario that can give the
most similar precomputed tsunami waveforms. The comparison between tsunami
waveforms from the hypothetical scenario and those from the site-specifi c best fault