Japan Geoscience Union Meeting 2015

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Oral

Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS25] tsunami deposit

Sun. May 24, 2015 11:00 AM - 12:45 PM 201B (2F)

Convener:*Kazuhisa Goto(International Research Institute of Disaster Science (IRIDeS),Tohoku University), Masanobu Shishikura(Institute of Earthquake and Volcano Geology, National Institute of Advanced Industrial Science and Technology), Yuichi Nishimura(Graduate School of Science, Hokkaido University), Chair:Yuichi Nishimura(Graduate School of Science, Hokkaido University), Masanobu Shishikura(Institute of Earthquake and Volcano Geology, National Institute of Advanced Industrial Science and Technology)

12:03 PM - 12:06 PM

[MIS25-P03] Four Holocene uplifted benches and two historical tsunami gravels around Koseda coast, Yakushima Island

3-min talk in an oral session

Shojiro NAKAGAWA1, Hiroyuki SASAKI1, Masamichi OMOTE2, *Futoshi NANAYAMA3, Nobuo GESHI3, Kazuaki WATANABE3, Hidetoshi NARUO4, Fukashi MAENO5, Tetsuo KOBAYASHI6 (1.Yakushima Earth-Science Club, 2.Yakushima Town Office, 3.Geological Survey of Japan, AIST, 4.Takeokadai Highschool, 5.Tokyo University, 6.Kagoshima University)

Keywords:Holocene wave-cut bench, huge tsunami trace, huge earthquake, Ryukyu subduction zone, Koseda coast, Yakushima Island

Many researchers have noted that Yakushima may have been struck by a huge earthquake and tsunami along Ryukyu subduction zone during historical age, but there is currently no clear evidence of this. We described four Holocene wave-cut benches uplifted by subduction earthquakes and two historical tsunami gravel beds around Koseda coast in northeastern Yakushima Island.