In Japanese, the word “tsunami” means “harbor wave.”
Tsunamis are massive waves of water commonly caused by an earthquake or volcanic eruption.
Tsunamis can travel at destructive speeds of around 500 miles an hour. They don’t lose their energy; in fact, they can travel across entire oceans with little energy loss.
If caught by a tsunami wave, don’t swim! Grab a floating object and let the current carry you.