Natural Disasters

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Across
  1. 4. sudden shaking of earth
  2. 6. no rainfall for long period
  3. 7. huge series of waves
  4. 8. instrument to detect earthquakes
Down
  1. 1. upper layer of the earth
  2. 2. liquid that comes out of volcano
  3. 3. one who study earthquakes
  4. 5. sliding of land