What is a tsunami?

May 1st, 2015
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Tsunami is the Japanese name given to large waves that sometimes devastated the shores and ports of Japan. A tsunami is a wave in the ocean but it is very different to normal waves.

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What is a tsunami?By hariomdsp fact-itehttp://www.gsa.org.auAcknowledgement: Greg McNamara, Education and Outreach, Geological Society of Australia What is a tsunami?Tsunami is the Japanese name given tolarge waves that sometimes devastatedthe shores and ports of Japan. A tsunamiis a wave in the ocean but it is verydifferent to normal waves.Tsunamis have very long wavelengths.Crest to crest they measure between 10and 500 km and they travel through theocean at more than 700 km/h. Sometimesthere appears to be just one wave butoften there are multiple waves travelling afew minutes apart.Wave height [amplitude] may notappear to be great in the open ocean(and often goes unnoticed) but unlikenormal waves the tsunami is moving theentire water column, all the way to thesea floor! The water depth thereforehas a major influence on the behaviourand appearance of the wave.

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