Tsunami have long wavelengths and very short wave heights in the open ocean.

Name: Tsunami have long wavelengths and very short wave heights in the open ocean.
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Question

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Tsunami waves can have wavelengths of up to several hundred kilometers, but their wave heights are often less than one meter in the open ocean. It's not until they approach shallow water near the coast that they begin to increase in height and become more dangerous.

Tsunami Have Long Wavelengths and Very Short Wave Heights in the Open