Earthquakes

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Across
  1. 3. Tectonics The theory explaining the movement of the Earth's plates.
  2. 5. The strength of shaking felt during an earthquake.
  3. 8. The point inside Earth where an earthquake originates.
  4. 9. A large ocean wave caused by an underwater earthquake.
  5. 11. The rigid outer layer of the Earth.
  6. 13. Secondary waves that arrive after primary waves.
  7. 14. A crack in the Earth's crust where rocks have slipped past each other.
  8. 15. A smaller earthquake that follows the main earthquake.
Down
  1. 1. Primary waves that are the fastest seismic waves.
  2. 2. A device that records ground movements caused by seismic waves.
  3. 4. A scale used to measure earthquake magnitude.
  4. 6. The point on Earth's surface directly above an earthquake's focus.
  5. 7. A smaller tremor occurring before a major earthquake.
  6. 10. Relating to or caused by an earthquake.
  7. 12. The measure of the energy released by an earthquake.