Spatiotemporal analysis of Tsunami wave property and hazardous sea area in Seto Island Sea

Abstract

Tsunami disaster prevention of Seto Inland Sea is slow to take action for lack of knowledge of generation mechanism of Tsunami damages. According to previous research papers, there is a possibility of appearance of sudden water level raising and long-term water level fluctuation in sympathetic vibration with characteristic vibration in some bay. Therefore, this study focuses on period characteristics and hazardous sea area. As a result of numerical analysis, temporal period characteristics of each sea area, distribution of largest tsunami heights and time of occurrence, distribution of maximum tsunami velocity and time of occurrence and a map of hazardous sea area are clarified. Moreover, generation mechanisms of Tsunami damages are examined.