are series of waves triggered by an earthquake, volcanic activity, or underwater landslide offshore. A tsunami can move at hundreds of miles per hour and can be 10–100 feet high. Even 10-foot tsunamis can be very destructive. Areas near the coast, within a mile of the shoreline, and that are less than 25 feet above sea level are at the most risk for a tsunami.
110401-M-QE984-172 Photo by: Cpl Megan Angel