Earthquakes are caused by the sudden movement of underground rock along tectonic plates. The 1906 San Francisco earthquake registered 7.7 on the Richter scale, killed 450-700 people, destroyed 25,000 homes, and caused over $350 million in damage. It struck at 5:15am and the rupture travelled at about 5,900 miles per hour.

1. Earthquakes can be powerful. Earthquakes

2. …a shaking of the ground caused by the sudden movement of underground rock. What is an earthquake

3. As the tectonic plates on the earth’s crust move, often they hit each other at the edges. Here the plates are sliding past each other. What causes earthquakes?

4. San franciscoapril 18, 1906 This earthquake was 7.7 on the richter scale. It killed 450-700 people,and destroyed 25,000 homes.

5. The earthquake hit at 5:15am The damage estimates topped $350,000,000. The rupture travelled at about 5,900 miles per hour. Information about the San Francisco earthquake

6. www.google.co.nz A book called ‘FLOODS’. www.wicked.org.nz By Isaiah So where did I find the information?