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Deaggregation of a seismic hazard result identifies the

  • A.magnitude and distance contributing most to the hazard
  • B.number of instruments needed at the site
  • C.cost of strengthening an existing structure
  • D.duration of shaking in the last earthquake

Answer: A

It breaks the total hazard back down to show which combinations dominate, which is what guides the choice of records for a time history analysis. Without it a uniform hazard spectrum gives no scenario to select against.

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