In subduction zones, where older and colder oceanic crust descends beneath another tectonic plate, Deep focus earthquakes may occur at much greater depths (up to seven hundred kilometers).

 
  • 在隐没带,当更古老更冰冷的洋底壳下降到另一版块之下时,深层震源地震可能会发生在很深的地方(达到为七百千米)。
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