Anonymous
Anonymous asked in Science & MathematicsEarth Sciences & Geology · 4 weeks ago

What percentage of earthquakes and volcanoes have occurred on or near plate boundaries?

3 Answers

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  • 4 weeks ago

    Earthquakes - Over 90%, according to the USGS.

    Volcanoes - 99%*

    *Technically, Iceland doesn't count, as it's actually the result of a hotspot, not the spreading of the Mid-Atlantic Ridge. The ridge just allows the hotspot to grow a large island very quickly.

  • Bill
    Lv 6
    4 weeks ago

    that is where they all occur-- where the plates crush against each other

    • Atarah Derek
      Lv 7
      3 weeks agoReport

      Hotspots happen when a mantle plume forces molten rock upward into a plate. They occur independently of plate boundaries. Iceland just happens to be on the Mid-Atlantic Ridge, but it is actually the result of a hotspot.

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