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The velocity of the compression wave in open (deep) water is aboooout 700 km/h (400mph). Divide the distance from the epicenter of the phenomenon generating the tsunami to the shore by the speed and you get the time.

When the wave nears the shore and the water depth decreases, the speed of the wave slows and its height grows, so add a few dozen seconds before the shore is inundated.

It takes about 2 minutes 24 seconds in most certain but not exactly that much.

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14y ago

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