Natural disasters

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Across
  1. 2. the gigantic waves
  2. 4. the corresponding of the earthquake
  3. 7. measures the earthquake
  4. 8. lava comes out
Down
  1. 1. volcanoes volcanoes that are not expected to erupt in future
  2. 3. a slight vibration after earthquake
  3. 5. sudden shaking of the earth
  4. 6. the starting point of earthquake