Multiple Regression Analyses of Human Damage Due to Tsunami in the 2011 Great East Japan Earthquake

－Synthetic Study on Characteristics of Tsunami and Social Factors－

Abstract

Tremendous Tsunami caused by the 2011 Great East Japan Earthquake resulted in approximately 19,000 victims. The purpose of this research is to analyse quantitative relationships between its mortality rate and other factors using multiple regression analysis. The result shows that the following four factors such as -the distance from the epicenter, the ratio of inundation area, geomorphologic characteristic and “combined social variable"of elderly people rate with industry-have significant relationship to mortality rate. It is conceivable that high rate of elderly people and fishing industry led to high mortality rate in the seriously damaged areas such as Onagawa and Minami Sanriku, which implies importance of social factors.