A Natural Warning of Tsunami Arrival
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Data of the Meijii and Showa Great Sanriku tsunamis are analyzed. When a tsunami higher than 5 m hit coastal cliffs, a “thunder-like” sound is generated and heard at distant places: The plunging breaker of a tsunami higher than 4 m generates a sudden “thunderbolt-like” sound which is heard only at the beach of the plunging. When a tsunami higher than 2.5 m with a front in the form of a spilling breaker proceeds in the shallow water, a continuous sound like a locomotive can be heard in the area. Some of these sounds may be used as a precursor of tsunami. An example of the blank spot in the area where sounds were heard is shown.
KeywordsTsunami Wave Sound Generation Wave Profile Tsunami Height Loud Sound
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- Ambraseys, N. N., 1962. Data for the investigation of the seismic sea-waves in the Eastern Mediterranean, Bull. Seism. Soc. America, 52, pp. 895–913.Google Scholar
- Council for Earthquake Disaster Prevention, 1933. Notes on the tsunami disaster prevention, for example, in Showa Earthquake and Tsunami in Miyagi Prefecture, published by the Miyagi Prefecture, pp.451–460 (in Japanese).Google Scholar
- Hei District, Iwate Prefecture, 1897. Report on the tsunami in the South Hei District, Rikuchu, Iwate Prefecture,p.132, pp.186–187 (in Japanese).Google Scholar
- Honda, K. and M. Takehana, 1933. Measured data of the strong earthquake off Sanriku, Kenshin Jiho, 17, No. 2, pp. 87–103 (in Japanese).Google Scholar
- Kajiura, K. and N. Shuto, 1990. Tsunamis, The Sea edited by LeMehaute and Hanes, Wiley Interscience, 9 Part A, pp.395–420.Google Scholar
- Mori, K., 1933. Tsunami history of Iwate Prefecture, Research of the Economy in Nanbu-ha, Series 4, reprinted from Iwate Education, Vol.11, Nos.6, 7 and 9, pp. 31–32 (in Japanese).Google Scholar
- Shuto, N., 1993. Tsunami intensity and disasters, Tsunamis In The World, edited by S. Tinti, Kluwer Academic Publishers, pp. 197–216.Google Scholar