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Discussion

Reliable short-term prediction of the time, place and size of an earthquake is at present

  • A.routine in seismically active countries
  • B.possible using foreshock patterns alone
  • C.possible from animal behaviour alone
  • D.not achievable

Answer: D

No precursor has proved dependable, so practice relies on hazard assessment, which states the probability of shaking over decades, and on engineering the structures to survive it. Forecasting a probability is a different matter from predicting an event.

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