TERRAPUB Earth, Planets and Space
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Earth Planets Space, Vol. 57 (No. 3), pp. 157-160, 2005

LETTER

Tsunami run-up heights of the 2004 off the Kii peninsula earthquakes

Nobuaki Koike1, Tomoyuki Takahashi2, Kentaro Imai2, Yuichiro Tanioka3, Yuichi Nishimura3, Kenji Harada4, Shingo Suzuki4, Koji Fujima5, Yoshinori Shigihara5, Yuichi Namegaya6, and Shunichi Koshimura7

1Department of Civil and Environmental Engineering, Wakayama National College of Technology, 77 Noshima, Nada-cho, Gobo, Wakayama 644-0023, Japan
2Department of Civil and Environmental Engineering, Faculty of Engineering and Resource Science, Akita University, 1-1 Tegatagakuen, Akita 010-8502, Japan
3Institute of Seismology and Volcanology, Hokkaido University, N10W8 Kita-ku, Sapporo 060-0810, Japan
4Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
5National Defense Academy in Japan, 1-10-20 Hashirimizu, Yokosuka, Kanagawa 239-8686, Japan
62Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
7Disaster Reduction and Human Renovation Institution, 1-5-2 Wakinohama kaigan-dori, Chuo-ku, Kobe 651-0073, Japan

(Received November 30, 2004; Revised February 24, 2005; Accepted February 25, 2005)

Abstract: A tsunami height survey was conducted immediately after the 2004 off the Kii peninsula earthquakes. Results of the survey show that the largest tsunami height was about 4.6 m locally at Kiho-cho, Mie prefecture. Numerical simulation of the tsunami due to the earthquake was carried out using the model parameters estimated by NIED. The distribution pattern of the observed tsunami heights along the coast cannot be explained by the computed heights, because the model equation is linear long-wave theory and the run-up computations with a finer grid system are not included in this simulation. In order to explain tsunami run-up heights, it is necessary that the non-linear and run-up computation model should be used with a finer grid system.
Key words: The 2004 off the Kii peninsula earthquakes, tsunami height survey, tsunami numerical simulation.


Corresponding author E-mail: koikenob@wakayama-nct.ac.jp


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