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What causes tsunami waves to grow in height as they approach shore?

April 26, 2017approach causes Geography grow height Mathematics shore tsunami waves

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What causes tsunami waves to grow in height as they approach shore?

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As the tsunami approaches the coast and the waters become shallow, the wave is compressed due to wave shoaling and its forward travel slows. Its wavelength diminishes to less than about 20KM (12m) and its amplitude grows enormously, producing a distinctly visible wave. “wave shoaling” occurs all the time, it is what causes normal waves to from that “wave”-like look. the wikipedia page has a description and an animation that helps you understand. http://en.wikipedia.org/wiki/Wave_shoali… so really, they increase in size is caused by the same thing that causes all waves to increase in size as they approach shore.