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The most destructive earthquakes are generally those with a

  • A.deep focus
  • B.focus at the mantle boundary
  • C.focus below 300 kilometres depth
  • D.shallow focus

Answer: D

A shallow rupture releases its energy close to the surface, so the waves have little distance in which to spread and attenuate before they reach structures. A deep earthquake of equal magnitude produces weaker but more widely felt shaking.

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