Earthquake Terminology

3. seismic waves that arrive last and usually cause the most damage
7. an instrument used to record and study earthquakes
8. the theory that states that rocks on either side of a fault will spring back to a position of little or no strain at the moment of an earthquake
9. the point on the earth's surface directly above an earthquake's epicenter
10. the study of earthquakes
13. the zone where about 15% of all earthquakes occur
16. scale that describes and evaluates an earthquake by its effects on people and buildings
17. the sudden vertical or horizontal movement of rock masses along a fault
18. the fastest-traveling type of seismic wave

1. the point on a fault at which an earthquake begins
2. one of the most active earthquake zones
4. an earthquake that results from sudden movements of rock below the earth's surface
5. the most reliable method for measuring an earthquake's strength
6. earthquake tremor that often follows a larger earthquake
11. the best-known earthquake magnitude scale
12. a record produced by a seismograph
14. a weak earthquake
15. earthquake-protection system that separates buildings from their foundations