Abstract
In the records of tsunami waves observed at Miyako, Sanriku Coast, Japan, there sometimes appears a tendency that after the initial wave arrival, tsunami waves once become attenuated, and the eminent peak suddenly appears in the cases of tsunamis generated in the sea region east off Hokkaido. This eminent peak is called the delayed peak of the tsunami wave. To clarify the causes of this delayed peak, we carried out numerical experiments on tsunami propagation. As a result, we found out that the cause of the delayed peak of the tsunami is the superposition of waves traveled two different routes. One is the route in which the tsunami wave directly reflects at Shimokita Peninsula from the tsunami source, and transfers into an edge wave mode. The other is the route in which the direct wave reflects at south coast of Hokkaido, propagates to Shimokita Peninsula, and transfers to the edge wave mode at Shimokita Peninsula. Because these two components, which run along quite different routes, arrive at Miyako at almost the same time, the heights of the delayed peaks sometimes exceed those of the initial waves.
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References
Abe, Ka.: 1973, Tsunami and Mechanism of Great Earthquakes, Phys. Earth Planet. Inter., 7, 143–153.
Abe, Ku. and H., Ishii: 1983, Study of Shelf Effect for Tsunami Using Spectral Analysis, Tsunamis: Their Science and Engineering, Proceedings of the International Tsunami Symposium 1981 IUGG Tsunami Commission May, 1981, Sendai-Ofunato-Kamaishi, Japan, 161–172.
Aida, I.: 1974, Numerical Computation of a Tsunami Based on a Fault Origin Model of an Earthquake, J. Seismol. Soc. Japan, 27, 141–154 (in Japanese).
Aida, I.: 1978, Reliability of a Tsunami Source Model Derived From Fault Parameters, J. Phys., Earth, 57–73.
Ball, F., K.: 1967, Edge Waves in an Ocean of Finite Depth, Deep-Sea Res., 14, 79–88.
Fuller, J., D., and L., A., Mysak: 1977, Edge Waves in the Presence of an Irregular Coastline, J. Phys. Oceanogr., 7, 846–855.
González, F., I., K., Satake, E., F., Boss, and O., Mofjeld: 1995, Edge Wave and Non-trapped Modes of the 25 April 1992 Cape Mendpcino Tsunami, PAGEOPH, 144, 409–426.
Japan Meteorological Agency, 1973; The Seismological Bulletin of The Japan Meteorological Agency for June 1973.
Kikuchi, M.: 2003, Realtime Seismology, University of Tokyo Press, pp. 222.
Mansinha, L. and Smylie, D. E.: 1971, The Displacement Fields of Inclined Faults, Bull. Seismol. Soc. Am., 61, 1433–1440.
Shimazaki, K.: 1994, Nemuro-Oki Earthquake of June 17, 1973: A Lithospheric Rebound at the Upper Half of the Interface, Phys. Earth planet. Inter.., 9, 314–327.
Shuto, N., T., Suzuki, K., Hasegawa, and K., Inagaki: 1986, A Study of Numerical Technique on the Tsunami Propagation and Run-up, Sci. Tsunami Hazards, the Intern. J. Tsunami Soc., 4–1, 111–124.
Tada, T.: 1974, Fault Model and Crustal Movement of the 1973 Nemuro-Oki Earthquake, J. Seismol. Soc. Japan, 27, 120–128 (in Japanese).
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Namegaya, Y., Tsuji, Y. (2005). Delayed Peaks of Tsunami Waveforms at Miyako from Earthquakes East off Hokkaido. In: Satake, K. (eds) Tsunamis. Advances in Natural and Technological Hazards Research, vol 23. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3331-1_7
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DOI: https://doi.org/10.1007/1-4020-3331-1_7
Publisher Name: Springer, Dordrecht
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