Youtube footage of one of the Samoan tsunamis coming ashore.
It shows how a tsunami really is more of a wall of water rather than one giant wave.
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on 1/10/2009 5:26pm
because there is already debri in the bay, thats not the first “wave”
the first wave would have been more like a wave
but yes, it is better to think of it as a rapid decrease then rapid increase in the sea level, instead of just a wave like a ocean wave
which was where NZ’s Civil Defence was very wrong in trying to compare an expected 1 m wave being only half the height of a good southerly storm!