tectonic activity

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Across
  1. 3. scale that measures the magnitude of an earthquake
  2. 8. where the distribution of main earthquakes and active volcanoes are located
  3. 11. when two plates move towards eachother
  4. 12. volcano that is temporarily at rest
Down
  1. 1. when two plates move away from eachother
  2. 2. scale for reassuring the effect of an earthquake
  3. 4. a sudden violent shaking of the ground
  4. 5. when two plates slide past eachother
  5. 6. one tectonic plate sinks below another plate
  6. 7. a mountain formed at subduction zone
  7. 9. rapidly flowing mixture of rock debris and water
  8. 10. a measurement of the strength of an earthquake