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How fast does a tsunami travel?

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Davethedog | 09:29 Fri 11th Mar 2011 | Science
6 Answers
The Japanese earthquake struck at about 5:45 our time yet Hawaii is already putting out warning sirens.

So how fast does a tsunami travel?
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Avatar Image squarebear
Check out the coverage in news. Looks over a ton to me.
09:30 Fri 11th Mar 2011
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Avatar Image jomifl
About 500 mph in open ocean depending in the wavelength.
14:09 Fri 11th Mar 2011
Avatar Image rov1100
They said 300mph on TV today but is decellarating all the time so can run out of steam at a faraway location.
16:43 Fri 11th Mar 2011
Avatar Image heathfield
Theres a map showing expected arrival times here...

http://www.bbc.co.uk/...ld-us-canada-12714558
17:51 Fri 11th Mar 2011
Avatar Image DTCwordfan
can get up to 400 to 500 mph depending on the initial dome of water........some of these can be uinbelievably frightening in size.
17:53 Fri 11th Mar 2011

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