For a tsunami to occur, they must be some kind of force that causes the ocean water to become displaced. Most Tsunamis are caused by underwater earthquakes. However, volcanoes, landslides, large icebergs, and even meteorites are capable of causing one of these mighty waves.
Tsunamis are extremely powerful. Ordinary waves lose power when they break. Tsunami waves can remain powerful for several days. Because tsunami wave so strong, they can kill people, damage property, and completely ruin an ecosystem in just one hour.
Scientists have no way of predicting when a tsunami will hit. However, if a power enough earthquake occurs, scientists can issue a warning or watch. A warning means that a tsunami will very likely hit soon. A watch means that conditions are favorable for tsunami. When people are notified about a watch or a warning, they have more time to prepare. It is best not to get caught unaware when a tsunami is on the way!