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Which one of the following does NOT influence the ground motion recorded at a site?

  • A.The distance from the source to the site
  • B.The stiffness of the soil beneath the site
  • C.The natural period of a building standing nearby
  • D.The magnitude of the earthquake

Answer: C

A neighbouring building does not change the free-field motion in any way a code accounts for, which is why free-field stations are sited clear of structures. The other three are the standard source, path and site terms.

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