Tsunami/Phase 1/Lesson1 4

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Tsunami Height

Tsunami height is a measure of the vertical “trough-to-crest” height of a tsunami wave (the trough is the bottom of the wave and the crest is the very top). This height is not constant – it increases substantially as the waves approach the shore. This is due to the ocean floor rising and pushing water upwards and much further inland: releasing considerable energy and resulting in coastal inundation. This is why in an evacuation people must either go to higher ground (ie: out of reach of the water) or as far inland as possible.   Watch this animation to see how a tsunami gets higher as it gets closer to shore

Wave form.png