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1 March, 15:38

Which one of the following is true of most tsunamis?

A. They are faster than seismic surface waves.

B. Their wave heights decrease and wavelengths increase as they move into shallower water.

C. They are usually started by sudden movement on a megathrust fault, and have wavelengths that are many kilometers long and wave heights of less than a meter.

D. They only occur in the Pacific Ocean basin.

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  1. 1 March, 15:53
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    C. They are sudden movements and have differential wave frequencies

    Explanation:

    As Tsunami is mostly a seismic wave that is generated due the sudden movements of megathrust faults one over the another their wavelengths depends on their displacement of trust faults, hence their speeds and heights are marked by the same.
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