When a tsunami happens in the deepest part of the ocean, the waves are only one to three feet tall.
The states in the United States that are most at risk of tsunamis are Hawaii, Alaska, Washington, Oregon, and California.
The most common cause of a tsunami is an earthquake, but they can also be caused by volcanic eruptions, landslides, rapid changes in atmospheric pressure, as well as other things.
Scientists guess that an asteroid hit the earth about 48 hundred years ago in the Indian Ocean and created a wave up to six hundred feet high.
Most palm trees survive tsunamis because their trunks have adapted to strong winds and waves.
Right before a tsunami (up to half an hour before), the ocean will appear to recede. This is called a "drawback".
Some animals have the ability to detect tsunamis, such as elephants, flamingos, dogs, and other creatures.