"TSUNAMI - The facts on killer waves" is described in the video. A tsunami is a series of ocean waves caused by an underwater earthquake, landslide, or volcanic eruption. 4. While waves generated by wind may travel anywhere from around 2 to 60 miles (3.2 to 97 km) per hour, tsunami waves can travel at speeds of 600 miles (970 km) per hour, the speed of a jet plane.