2009 Fiscal Year Final Research Report
Recurrence Intervals of Mega Nankai Earthquakes recorded in tsunami sediments
| Project/Area Number |
19310117
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Natural disaster science
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| Research Institution | Kochi University |
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Principal Investigator |
MATSUOKA Hiromi Kochi University, 教育研究部自然科学系, 准教授 (60222296)
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| Co-Investigator(Kenkyū-buntansha) |
OKAMURA Makoto 高知大学, 教育研究部自然科学系, 教授 (10112385)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 津波堆積物 / 津波 / 地震 / 南海地震 / 巨大地震 / 再来周期 / 自然災害 / 地質学 |
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| Research Abstract |
We investigated core sediment from ponds and lakes along the coast of southwestern Japanese Islands along the Nankai Trough to reveal pre-historical evidence of Nankai earthquakes. The average recurrence interval of tsunami events were 300-350 years. This value was much larger than the value, 100-200 years, of the historical events. This result implies that relatively large Nankai earthquakes only have been recorded in the sediments.
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