Earthquake

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Across
  1. 2. moving past each other horizontally.
  2. 5. Explosive geological feature found in island arcs.
  3. 6. Process where one tectonic plate moves under another.
  4. 9. Instrument that measures the magnitude of an earthquake.
  5. 10. Long, narrow, steep-sided depressions in the ocean.
  6. 12. The instrument used to record tremors of the Earth.
  7. 13. The outer layer of the Earth.
  8. 15. Chains of volcanic islands associated with intense seismic activity.
Down
  1. 1. Another term for the Earth's crustal movements.
  2. 3. Point on the Earth's surface directly above the earthquake focus.
  3. 4. Sudden violent shaking of the ground.
  4. 7. Plate boundary where plates move apart.
  5. 8. Type of boundary where two tectonic plates move towards each other.
  6. 11. Point within the crust where an earthquake originates.
  7. 14. Narrow bands of earthquakes indicate this type of boundary.