Tsunami

Definition and stakes

by the United States government,  Chapters (2002)

“ Either a tsunami or a storm tide that overflows the land is popularly called a tidal wave, although it bears no relation to the tide.
If a volcanic eruption occurs below the surface of the sea, the escaping gases cause a quantity of water to be pushed upward in the shape of a dome. The same effect is caused by the sudden rising of a portion of the bottom. As this water settles back, it creates a wave which travels at high speed across the surface of the ocean.
Tsunamis are a series of waves. Near the epicenter, the first wave may be the highest.
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Source: Wikisource

by the United States government,  Chapters (2002)

“ Because of the great speed of a tsunami when it is in relatively deep water, the slowing is relatively much greater than that of an ordinary wave crested by wind. Therefore, the increase in height is also much greater. The size of the wave depends upon the nature and intensity of the disturbance. The height and destructiveness of the wave arriving at any place depends upon its distance from the epicenter, topography of the ocean floor, and the coastline. The angle at which the wave arrives, the shape of the coastline, and the topography along the coast and offshore, all have an effect. ”
Source: Wikisource

Committee For Nuclear Responsibility Inc v…

“ According to the Impact Statement, 'the possibility of the CANNIKIN explosion or an earthquake causing a damaging tsunami (seismic sea wave) is even more unlikely [than the triggering of a great earthquake] .' I. S., p. 3. The Train memo itself points out, 'Large earthquakes in the near vicinity of Amchitka have not caused destructive tsunamis in the past.' Train memo, p. 4. Train goes on, however: 'as in the case of earthquakes it is not possible at this time to assess quantitatively the probability of a tsunami following the explosion.' Id., at 4-5. ”
Source: Wikisource

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