Tsunamis move at great speeds and have tremendous energy; the speed depends on the depth of the water it is traveling through. The deeper the water, the faster they move.
In the deep ocean, tsunamis can move as fast as a jet plane, over 500 mph (800 km/h), and can cross entire oceans in less than a day.
The distance between waves is the wavelength. Because of a tsunami's long wavelengths, which can be hundreds of miles, a tsunami is barely noticeable in the deep ocean and rarely more than three feet (one meter) high. ๐