Our earthquake crossword

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Across
  1. 4. A giant ocean wave caused by an underwater earthquake.
  2. 6. The point on Earth's surface directly above where an earthquake starts.
  3. 8. A measure of the total energy released by an earthquake
Down
  1. 1. Waves of energy that travel through the Earth's layers.
  2. 2. Another word for a shaking or tremor.
  3. 3. A break in the Earth's crust where rocks move.
  4. 5. Instrument that detects and records earthquake vibrations.
  5. 7. The spot underground where the rock first breaks.