Abstract
The southwest Hokkaido tsunami of July 12th, 1993, left continuous onshore sand deposits along the west coast of Oshima Peninsula, Hokkaido, northern Japan. We investigated spatial distribution and lithofacies of the new tsunami deposits for its identification of ancient tsunami deposits. An eyewitness account and bent plants helped our interpretation of the onshore tsunami behavior. We regard the following properties as typical of the coastal tsunami sand deposits: (1) The deposits cover the surface almost continuously on gentle topography. (2).Deposit thicknesses and mean grain sizes decrease with distance from the sea. (3) Deposit thicknesses and lithofacies vary greatly across local surface undulation. (4) Graded bedding reflecting tsunami runup and backwash is present in thick deposits. (5) The deposits are widely distributed along the coast and extend inland several tens of meters to 100 m. We examined a candidate for the paleo-tsunami deposits associated with the 1640 Komagatake eruption, and confirmed that the similar patterns are typical of ancient tsunami deposits.
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References
Abe, H., Sugeno, Y., and Chigama, A. (1990), Estimation of the Height of the Sanriku Jogan 11 Earthquake-tsunami (A. D. 869) in the Sendai Plain, Zishin 43, 513–525 (in Japanese with English abstract)
Atwater, B. F. (1987), Evidence for Great Holocene Earthquakes along the Outer Coast of Washington State, Science 236, 942–944
Atwater, B. F., and Yamaguchi, D. K. (1991), Sudden, Probably Coseismic Submergence of Holocene Trees and Grass in Coastal Washington State, Geology 19, 706–709
Atwater, B. F., and Moore, A. L. (1992), A Tsunami about 1000 Years Ago in Puget Sound, Washington, Science 258, 1614–1617
Clague, J. J., and Bobrowsky, P. T. (1994), Evidence for a Large Earthquake and Tsunami 100–400 Years Ago on Western Vancouver Island, British Columbia, Quat. Res. 41, 176–184
Dawson, A. G., Long, D., and Smith, D. E. (1988), The Storegga Slides: Evidence from Eastern Scotland for a Possible Tsunami, Mar. Geol. 82, 271–276
Dawson, A. G., Long, D., Smith, D. E., Shi, S., and Foster, I. D. L., Tsunamis in the Norwegian Sea and North Sea caused by the Storegga submarine landslide. In Tsunamis in the World (ed. Tinti, S.) (Kluwer Academic Publishers 1993) pp. 31–42
Inman, D. L. (1952), Measures for Describing the Size Distribution of Sediments, J. Sed. Petrol. 22, 125–145
Katsui, Y., Yokoyama, I., Fujita, T., and Ehara, Y. (1975), Komagatake, its Volcanic Geology, History of Eruption, Present State of Activity and Prevention of Disaster, Committee for Prevention of Disasters of Hokkaido, Sapporo, 194 pp. (in Japanese)
Kon’no, E., ed. (1961), Geological Observations of the Sanriku Coastal Region Damaged by Tsunami due to the Chile Earthquake in 1960, Contrib. Inst. Geol. Paleontol. Tohoku Univ. 52, 1–45 (in Japanese with English abstract)
Minoura, K., and Nakaya, S. (1991), Traces of Tsunami Preserved in Inter-tidal Lacustrine and Marsh Deposits: Some Examples from Northeast Japan, J. Geol. 99, 265–287
Miyaji, N., and Nishimura, Y. (1994), Tsunami Deposits Associated with the 1993 Southwest Hokkaido Earthquake, Japan, Bull. Nat. Dis. Sci. Data Center, Hokkaido 9, 25–48 (in Japanese with English abstract)
Moore, J. G., and Moore, G. W. (1984), Deposit from a Giant Wave on the Island of Lanai, Hawaii, Science 226, 1312–1315
Nakanishi, I., Kodaira, S., Kobayashi, R., Kasahara, M., and Kikuchi, M. (1993), The 1993 Japan Sea Earthquake: Quake and Tsunamis Devastate Small Town, EOS, Trans. Am. Geophys. Union 74, 377–379
Nishimura, Y., and Satake, K. (1993), Numerical Computations of Tsunamis from the Past and Future Eruptions of Komagatake Volcano, Hokkaido, Japan, Proc. of IUGG/IOC International Tsunami Symposium, Wakayama, Japan, 573–583
Sato, H., Shimamoto, T., Tsutsumi, A., Kawamoto, E., and Miyawaki, M. (1994), Onshore Tsunami Sediments Caused by the 1993 Southwest Hokkaido Earthquake and the 1983 Japan Sea Earthquake, Katsudanso Kenkyu 12, 1–23 (in Japanese)
Shi, S., Dawson, A. G., and Smith, D. E. (1993), Geomorphological Impact of the Flores Tsunami of 12th December, 1992, Proc. of IUGG/IOC International Tsunami Symposium, Wakayama, Japan, 689–696
Tsuji, Y. (1989), Tsunami from the Eruption of Hokkaido Komagatake on July 13, 1640, Program and Abstracts of Seismological Society of Japan 1, 336 (in Japanese)
Tsuji, Y., Kato, K., Arai, K., Han, S., and Yamanaka, Y. (1994), Characteristics of the Southwest Hokkaido Tsunami, Kaiyo Monthly 7, 110–122 (in Japanese)
Wright, C, and Mella, A. (1963), Modifications to the Soil Pattern of South-central Chile Resulting from Seismic and Associated Phenomena During the Period May to August 1960, Bull. Seismol. Soc. Am. 53, 1367–1402
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© 1995 Birkhäuser Verlag, Basel
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Nishimura, Y., Miyaji, N. (1995). Tsunami Deposits from the 1993 Southwest Hokkaido Earthquake and the 1640 Hokkaido Komagatake Eruption, Northern Japan. In: Imamura, F., Satake, K. (eds) Tsunamis: 1992–1994. Pageoph Topical Volumes. Birkhäuser Basel. https://doi.org/10.1007/978-3-0348-7279-9_19
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DOI: https://doi.org/10.1007/978-3-0348-7279-9_19
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