global patterns

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  • plate tectonics and hazards
    • destructive plate boundary
      • oceanic crust subducted beneath a continental plate or where two oceanic or continental plates collide
    • constructive
      • oceanic plates moving apart. show/ low magnitude earthquakes, most of which are submarine
    • conservative
      • plates slide past each other. shallow earthquakes, high magnitude
    • earthquake distriubution
      • destructive and conservative plate boundaries
      • low and high magnitude
      • cause secondary hazards
    • volcanoes distribution
      • constructive and destructive plate boundaries
      • where constructive plate boundaries occur on continents volcanoes tend to be more explosive
      • 80% occur on destructive plate boundaries


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