Modeling of the runup heights of the Hokkaido-Nansei-Oki tsunami of 12 July 1993
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The Hokkaido-Nansei-Oki earthquake (M w 7.7) of July 12, 1993, is one of the largest tsunamigenic events in the Sea of Japan. The tsunami magnitudeM t is determined to be 8.1 from the maximum amplitudes of the tsunami recorded on tide gauges. This value is larger thanM w by 0.4 units. It is suggested that the tsunami potential of the Nansei-Oki earthquake is large forM w . A number of tsunami runup data are accumulated for a total range of about 1000 km along the coast, and the data are averaged to obtain the local mean heightsH n for 23 segments in intervals of about 40 km each. The geographic variation ofH n is approximately explained in terms of the empirical relationship proposed byAbe (1989, 1993). The height prediction from the available earthquake magnitudes ranges from 5.0–8.4 m, which brackets the observed maximum ofH n , 7.7 m, at Okushiri Island.
Key wordsTsunami magnitude runup tsunami warning
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- Abe, K. (1979),Size of Great Earthquakes of 1837–1974 Inferred from Tsunami Data, J. Geophys. Res.84, 1561–1568.Google Scholar
- Abe, K. (1981),Physical Size of Tsunamigenic Earthquakes of the Northwestern Pacific, Phys. Earth Planet. Inter.27, 194–205.Google Scholar
- Abe, K. (1985),Quantification of Major Earthquake Tsunamis of the Japan Sea, Phys. Earth Planet. Inter.38, 214–223.Google Scholar
- Abe, K. (1988),Tsunami Magnitude and the Quantification of Earthquake Tsunamis around Japan, Bull. Earthquake Res. Inst. Tokyo Univ.63, 289–303 (in Japanese with English abstract)Google Scholar
- Abe, K. (1989),Estimate of Tsunami Heights from Magnitudes of Earthquake and Tsunami, Bull. Earthquake Res. Inst. Tokyo Univ.64, 51–69 (in Japanese with English abstract).Google Scholar
- Abe, K. (1993),Estimate of Tsunami Heights from Earthquake Magnitudes, Proceedings of the IUGG/IOC International Tsunami Symposium TSUNAMI '93, Wakayama, Japan, Aug. 23–27, pp. 495–507.Google Scholar
- Aida, I. (1978),Reliability of a Tsunami Source Model Derived from Fault Parameters, J. Phys. Earth26, 57–73.Google Scholar
- Hokkaido Tsunami Survey Team (1993),Tsunami Devastates Japanese Coastal Region, EOS Trans. AGU74, 417.Google Scholar
- Kajiura, K.,Some statistics related to observed tsunami heights along the coast of Japan, InTsunamis—Their Science and Engineering (eds. Iida, K., and Iwasaki, T.) (Terra Sci. Publ., Tokyo 1983) pp. 131–145.Google Scholar
- Nakanishi, I., Kodaira, S., Kobayashi, R., Kasahara, M., andKikuchi, M. (1993),The 1993 Japan Sea Earthquake, EOS Trans. AGU74, p. 34.Google Scholar
- Shuto, N. (1994),Tsunami Runup Heights for the Hokkaido-Nansei-Oki Earthquake, Tsunami Engineering Tech. Rep., Disaster Control Research Center, Tohoku Univ., 120 pp.Google Scholar