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.
A tsunami wave can travel from anywhere to 33mph to 500mph.
Another name for tidal wave is Tsunami.
Tanganyika Tidal Wave was created in 1989.
A tidal Wall
The term tidal wave is often used to mean a tsunami. However, the term "tidal wave" has fallen out of favor because tsunamis have nothing to do with tides. The term tidal wave may also refer to a tidal bore, which is a wave that forms in some locations when the tide is rising.
fast
A tidal wave hits the US coastline twice a day, as it does everywhere else in the world. I think you mean a 'tsunami'.
A tidal wave is a water wave so it is a mechanical wave.
A tsunamis has a wave that is longer in length and looks like a fast rising tide rather than a traditional wave. A tidal wave is a wave that can reach as about a hundred feet tall and will look like a normal wave.
The tidal wave starts by the moon
A tsunami wave can travel from anywhere to 33mph to 500mph.
there is no other name for a tidal wave, just tidal wave
tidal wave starts by pressure in the oceans floor
There is a 97% chance that you could get killed by a tidal wave.
Tsunami is the name given to a tidal wave.
Another name for tidal wave is Tsunami.
Tanganyika Tidal Wave was created in 1989.