Tectonic Plates

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Across
  1. 6. the study of earthquakes
  2. 7. one of the main causes for tsunamis
  3. 9. ring with much seismic activity
  4. 10. when two plates slide past one another
Down
  1. 1. worst tsunami struct here in 2004
  2. 2. when two plates collide with one another
  3. 3. fukushima was struct by one in 2011
  4. 4. units to measure earthquakes
  5. 5. when two plates move away from one another
  6. 8. largest ocean