High tides and low tides are the causes of the gravitational attraction force of the sun, the moon and the rotating earth. Tides are also waves and the longest ones. It is far under the tide generating force of the moon. As quoted in National Oceanic and Atmospheric Administration, Thurman (1994) predicts the tide-generating force of the sun only amounts to 27/59. The distance between the earth and the sun decreases its tide-generational force. Despite the attraction force between the earth and the sun is far greater than between the earth and the moon, the last attraction force is more dominant in the water tides. Concerning tides in ocean, the distance is more determinant factor than the gravitational attraction force. See also: Ocean Environment – Marine DisastersĪs quoted in National Oceanic and Atmospheric Administration, Ross (1995) states that the greater the mass of the objects and the closer they are to each other, the greater the gravitational attraction between them. This destructive cycle may repeat several times as other waves arrive causing additional damage. ![]() When the through of the wave hits basin it carries great debris and exposes great patches of the sea floor. National Oceanic and Atmospheric Administration predicts the speed of a tsunami to come to shallow water slows 20 or 30 mph and becomes compressed. On the other hand, when approaching ashore, the basin is lower and the velocity is constant, and it increases their wave crest. Their wave crest can undergo bending when their wave motion changes to different speed. Tsunamis energy does not change and it relatively remains constant despite the water depth decreases and their velocity decreases. Moreover, what happens when tsunamis come to shallow water? If tsunamis come on beaches, they are destructive. Tsunamis have the wave period of ten minutes to two hours. Moreover, the wave period of tsunamis are the amount of time it requires for one wavelength to pass a stationary point. As the deep water depth rises, the wavelength rises. ![]() Their wavelength is fully linked to the underwater displacement and the deep water depth where the disturbances occur.
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