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A fault plane solution obtained from seismic records tells the analyst

  • A.the exact time of the next earthquake
  • B.the orientation of the fault and the sense of slip
  • C.the number of aftershocks to expect
  • D.the intensity that will be felt at a given town

Answer: B

Correct answer: the orientation of the fault and the sense of slip

A fault plane solution uses the pattern of first motions recorded around the earthquake - which stations moved up first and which moved down - to find the two possible orientations of the fault and the direction of slip on it. It reveals the mechanism of the event, and by extension the stress regime, but it says nothing about future earthquakes.

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