Japan Geoscience Union Meeting 2015

Presentation information


Symbol H (Human Geosciences) » H-DS Disaster geosciences

[H-DS27] Tsunami and Tsunami Forecast

Wed. May 27, 2015 2:15 PM - 4:00 PM A04 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Yutaka Hayashi(Meteorological Research Institute), Yuichi Namegaya(Institute of Earthquake and Volcano Geology, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), Chair:Nobuhiko Toyama(National Research Institute for Earth Science and Disaster Prevention)

3:00 PM - 3:15 PM

[HDS27-14] Tsunami Heights of the 1707 Hoei and the 1854 Ansei -Nankai earthquakes on the coasts of the Bungo straits

*Yoshinobu TSUJI1, Hiroyuki IWASE2, Takumi MORIYA2, Kentaro IMAI3, Masami SATO3, Yayoi HAGA3, Fumihiko IMAMURA3 (1.Fukada Geolog. Inst., 2.Ecoh Co. Ltd., 3.IRIDeS, Tohoku Univ.)

Keywords:the 1854 Ansei Nankai Earthquake-Tsunami, the 1707 Hoei Earthquake-Tsunami, Bungo straits, Ehime prefecture, Ooita prefecture, Miyazaki prefecture

We made field surveys of the height distributions of the tsunamis of the 1707 Hoei and the 1854 Ansei Nankai Earthquakes on the coasts of both side of Bungo straits, the coasts of Ehime Prefecture, Shikoku, and Ooita and Miyazaki prefectures, Kyushu by using a GPS level. On the coast of Ehime Prefecture, we made field survey the top of Sada cape to the southern boundary of the prefecture. Almost all of this area was the region of the clan of Date family, the lord of Uwajima Castle town. A detailed documents on damage of houses, rice field, and fishery vessels by the tsunamis were officially recorded. On Kyushu coast, Lord of Saeki castle recorded damage house and rice field damage of the 1854 Ansei tsunami for 21 coastal villages in the south part of Ooita Prefecture, Kyushu. The obtained height distribution of the tsunami of the 1854 Ansei Nankai earthquake is illustrated in the figure. Tsunami heights was 6.3 meters at Shimohisage village, Ainan town, Ehime prefecture, Shikoku, where all houses were swept away. Tsunami height of 7.1 meters was clarified at Takenoura and Maruichi villages, Ooita prefecture, Kyushu. The present study is financially supported by the Nuclear Regulation Authority.