Field survey of the 1993 Hokkaido Nansei-Oki earthquake tsunami |
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| Authors: | N Shuto H Matsutomi |
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| Institution: | (1) Disaster Control Research Center, Faculty of Engineering, Tohoku University, 980-77 Sendai, Japan;(2) Department of Civil and Environmental Engineering, Faculty of Mine Engineering, Akita University, Tegata Gakuen 1-1, 010 Akita, Japan |
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| Abstract: | Runup data in Hokkaido and in three prefectures in the Tohoku District are described with a few witnessed arrival times and with comments of tide records. The highest runup of 31.7 m was found at the bottom of a narrow valley on the west coast of Okushiri Island. In order to explain high runups of 20 m at Hamatsumae in the sheltered area, roles of edge waves, refraction of the Okushiri Spur and tsunami generation by causes other than the major fault motion should be understood. An early arrival of the tsunami on the west coast of Hokkaido suggests another tsunami generation mechanism in addition to the major fault motion. |
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| Keywords: | Tsunami runup arrival time edge wave Japan Sea |
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