| Earthquakes |
| Earthquakes are a violent shaking of the earth's crust.When earthquakes occur underwater and trigger a violent series of waves it is called a tsunami. |
| What are earthquakes? |
| Where do earthquakes occur? |
| Earthquakes occur along fualts. Fualts are cracks in the Earth's crust where plates meet. One such fualt is the San Anderes Fualt in Califofnia. Thousands of earthquakes occour there every year. |