“ Tsunami waves, on the other hand, ” says the book Tsunami!, “may travel as fast as a jetliner, an astonishing 500 miles [800 km] per hour or more in the deep waters of an ocean basin. ”
ولكن على الرغم من سرعتها ،‏ فهي لا تشكل خطرا في المياه العميقة .‏