Question: which is correct about tsunamis : The first batch of a tsunami is always the highest and the most powerful --- just before the arrival
which is correct about tsunamis : The first batch of a tsunami is always the highest and the most powerful --- just before the arrival of a tsunami, water always recedes from the beach --- when the water depth becomes 1/2 , the speed of the tsunami becomes 1/4 --- typical height of a tsunami in the outer ocean is less than a meter
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