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The three factors that shape a ground motion at a site are conventionally called

  • A.stiffness, damping and the mass of the structure
  • B.source, path and site effects
  • C.magnitude, intensity and the duration of shaking
  • D.amplitude, frequency and the phase of the waves

Answer: B

The earthquake itself sets what is radiated, the travel path filters and attenuates it, and the local ground modifies it again before it reaches the foundation. Separating the three is the basis of every ground motion prediction equation.

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