When the ocean is deep tsunamis can travel unnoticed on the surface at speeds up to 500 miles per hour (800 kilometers per hour), crossing the entire ocean in a day or less.
How fast do Tsunamis travel?
How do tsunamis travel so fast?
A: Tsunamis travel fast because they have a very long wavelength compared to wind-driven water waves. Tsunamis originate when the entire column of water above the seafloor is uplifted or dropped down. Unlike wind waves, they are driven by gravity.
Would a tsunami kill you instantly?
Tsunamis are harmless for 95% of their life. The energy of the tsunami runs through the entire depth of the ocean. It only becomes deadly when the ocean floor becomes shallow, and all that energy compresses into a smaller amount of water.
What is the highest velocity of a tsunami?
Velocities of normal ocean waves are about 90 km/hr while tsunami have velocities up to 950 km/hr (about as fast as jet airplanes), and thus move much more rapidly across ocean basins.