Why does the ocean recede prior to a tsunami? Where does the water go?
In: Planetary Science
Plug your sink and fill it half way with water. The amount of water doesn’t change from now on. Then place your hand on the water surface and slowly move it up and down.
You’re creating waves. The edge of the sink represents the shore line and you’ll see the water going up and down. Because the volume of water is constant, the level in the middle of the sink has to rise when it sinks at the shore line.
No imagine you’d be able to do one big up and down movement with your hand and the water would follow. This would represent an underwater earthquake. While all the Water follows your hand upwards, the level on the shore line has to drop significantly.
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