Managing Director:
Fumihiko Imamura
(University of Tohoku)

  Summary
 Tsunami is the secondary damage from an earthquake. Many human lives have lost by the giant tsunami when the Great East Japan Earthquake occurred in 2011. In order to protect lives from the tsunami which has huge power in a wide area, information such as prior assumption and evaluation, and the real time alert are indispensable. If one knows when and how the tsunami attacks, he can avoid the harm by such means as evacuation. Now, in Japan, The system of quantitative forecasts is working mainly operated by the Meteorological Agency. However, in order to take quicker and more certain evacuation behavior, still more detailed and exact information is needed in more short time.
When carrying out of tsunami including the complicated building and geographical feature in the coast, it is necessary to adopt more complicated phenomenon. Then, HPCI "K Computer" which can process overly large-scale data at high speed is indispensable. Now we are researching the possibility to analyze the transmission of tsunami and the process of going upstream on real time, by using the three-dimensional data expressing the high density ground data and the building and roads on different spatial scale.
By reproducing the giant tsunami by the Great East Japan Earthquake in 2011 and predicting the largest tsunami may happen in Nankai Trough area, we can see the action of tsunami such as tree-dimension flow, impulse force, the movement of earth and sand, and flotsam which we did not know will today.