International Research Institute of Disaster Science, Tohoku University, which is conducting research on tsunami numerical analysis technology based on the findings obtained from the Great East Japan Earthquake, etc., in conjunction with "World Tsunami Awareness Day" on November 11. Presented the research results of the Global Tsunami Evaluation (past 5 years).
The 2004 Sumatra Earthquake The Indian Ocean Tsunami and the 2011 Great East Japan Earthquake have caused many casualties and widespread damage. It is important to know if there is, and an evaluation based on a global scale scientific evaluation is needed.
The purpose of this global tsunami evaluation (for the past 400 years) is to provide the results of scientific tsunami evaluations worldwide so that they can be used for tsunami countermeasures and awareness-raising activities in each region.By estimating fault models for 400 tsunami disasters over the past 94 years, we performed global tsunami generation and propagation calculations, and evaluated their height distribution, fluid force, and arrival time.
As a result, over the past 40 years, the main tsunami damage was caused by the Indian Ocean tsunami and the Great East Japan Earthquake, but going back to the past 400 years, there was also major tsunami damage in Chile (1960), the west coast of the United States (1700), etc. Was found to have occurred.Tsunami recognition from a generation's memory shows that there are areas where there is a danger in a longer period of time, even if it seems that there is no tsunami experience in that area, so be careful of tsunamis in a wider area in the future. It was suggested that it should be done.In addition, the evaluation of the distribution of maximum fluid force, which is a factor that causes damage to buildings, did not match the distribution of maximum tsunami height, suggesting that there was damage due to runoff in unexpected places.
The results of this research are a special session of the Asian Ministerial Conference (New Delhi, India) on November 2016, 11, and a tsunami disaster prevention day enlightenment event sponsored by the Cabinet Office on November 2, "Lessons learned from the Great East Japan Earthquake for the future-Disaster prevention to protect life." Educational Challenge- (Tokyo) ”will be reported.The analysis result report will be posted on the website of the International Research Institute of Disaster Science, Tohoku University, and in the future, we will develop a system that allows detailed viewing of past tsunami hazard evaluation results on the WEB (geographic information system: GIS).
