What Is a Tsunami 4 How Do Tsunamis Form 6 What Can Tsunamis Do 12 Measuring and Predicting Tsunamis 16 The Indian Ocean Tsunami 20 Glossary 22 Learn More 23 Index 24 B C B C
4 Waves move constantly on the ocean Ordinary waves are caused by the wind pushing water Sometimes a far more powerful kind of wave forms
5 It is a tsunami wave These waves are caused by a major disturbance on the ocean floor such as an earthquake
