It depends on the depth. On deep oceans it can hit 500 mph. Near the land it slows down to 20 or 30 mph.
http://www.publicaffairs.noaa.gov/grounders/tsunamis.html
It is important to note that the 500 mph is simply a theory, there is no method to truly measure the speed of the wave. Also, if you follow the above link it explains that when the tsunami approaches any land it slows to 20-30 mph. This would even further refute the 500 mph.
yes they do and there strong
Another Answer
Thanks to Glenn Elert's online Physics Fact Book:
"The maximim for the Gulf Stream is 2.5 meters per second on the surface and 0.02-0.10 meters per second in deep water."
Read more, below.
Tidal currents move at 1 knot... which is equal to 1.15 miles per hour....
In deep ocean water, a tsunami can move at about 500 mph. When they get into shallow water they slow to 50 mph ot less.
When are the tidal currents strongest?
Tidal currents
tidal currents
Gravitational pull of the moon
tidal currents
When are the tidal currents strongest?
Tidal currents are not quite the same thing as tides. Tidal currents are horizontal movements of water caused by the tides.
M.J Howarth has written: 'Intercomparison of current meters in fast tidal currents'
In direct proportion to the air currents
Tidal Currents
Tidal Currents
Tidal Currents
Tidal Currents
Tidal Currents
Tidal Currents
Tidal Currents
Tidal Currents