| Budget Amount *help |
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2016: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2014: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
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| Outline of Final Research Achievements |
This study investigated geological evidence of paleotsunami at the islands near mainland of Japan, New Zealand, and United Sates of America. At Hachijo Island in Japan, we found numerous boulders on top of the 5 meter high cliff. Water tank experiment and numerical modeling revealed that these boulders can be explained by high storm wave although tsunamis with shorter wave period can also move these boulders. At Chatham Island in New Zealand, we identified boulders and sand to gravel sheet were deposited together. Field evidence as well as numerical modeling results may imply that these geological evidences could be explained by trans-Pacific tsunamis such as generated along Peru-Chile Trench, although further detail modeling is required. In Hawaii Islands, we identified possible evidence of 1946 Aleutian tsunami. These evidence would be useful to constraint the source model of this tsunami event.
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