In order to quickly grasp the overall picture of the damage caused by a large tsunami caused by a huge earthquake, the development of a system that predicts the inundation range in a short time in addition to the height of the tsunami is underway.
From the new fiscal year, the Cabinet Office will use it for the initial response after the earthquake along the coast from Hokkaido to Kagoshima Prefecture, and the research group plans to work on improving accuracy so that it can be used for evacuation of residents in the future. ..
* The video is an example of the prediction result
The Japan Meteorological Agency has decided to issue a tsunami warning within 3 minutes of the occurrence of the earthquake, but in the Great East Japan Earthquake, the scale of the earthquake was underestimated, and the tsunami height forecast originally announced in the large tsunami warning actually It was far below.
From this lesson, the Japan Meteorological Agency does not indicate the height of the tsunami numerically, but emphasizes the danger as "huge" or "high" when it is thought that a huge earthquake occurred whose magnitude is not immediately known, and for quick evacuation. I'm going to connect.
Furthermore, research is underway to use data on crustal movements in addition to seismic waves to predict the extent of inundation.
Groups such as the International Research Institute of Disaster Science, Tohoku University use supercomputers to quickly estimate the scale of the displaced seafloor from the data of crustal movements captured by artificial satellites, and predict the scale of the tsunami.
Based on topographical and building data, within 30 minutes of the occurrence of an earthquake, the extent and depth of inundation and damage to buildings are predicted and displayed on a map.
The Cabinet Office has been receiving damage prediction data from Ibaraki prefecture to Kagoshima prefecture in order to utilize it for initial response such as rescue immediately after the earthquake, and from April, Tohoku and Hokkaido will be added to the range. ..
In the future, the research group wants to expand the forecast target to the Sea of Japan side, and to work on shortening the required time and improving the accuracy so that it can be directly used for evacuation of residents in the future.
Professor Shunichi Koshimura of the International Research Institute of Disaster Science, Tohoku University, who is at the center of his research and is familiar with the mechanism of tsunami, said, "The bigger the disaster, the faster we want to respond, but there is a fundamental problem that we do not know the full extent of the damage. By providing it, we would like you to proceed with relief in the disaster area more quickly and efficiently. In the future, we would like to improve the reliability of the information so that it can be used as information that saves human lives. "