A tsunami usually occurs because of an earthquake under the ocean. It can also be created by underwater landslides or volcanic eruptions, or by the sinking of ocean islands.

When the giant wave of a tsunami hits the coast, people may drown. Entire towns can be wiped out.

To learn more about tsunamis:

1. Go to the Red Alert! WWW Sheet and print it.

2. Visit these Web sites. Then complete the WWW Sheet.
    Surf's Up!
    Taming the Ocean
    Tsunami: Ocean Traveler

3. For more information, visit this Web site.
    Biggest Wave