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The seismic gap theory suggests that a future earthquake is more likely along

  • A.any region where the crust is under tension
  • B.a segment of an active fault that has not slipped recently
  • C.a segment that has just produced a large earthquake
  • D.a fault that shows no historical seismicity at all

Answer: B

Correct answer: a segment of an active fault that has not slipped recently

The reasoning is that strain accumulates steadily along an active fault, so a segment that has stayed quiet while its neighbours have ruptured has been storing strain for longer and is closer to failure. It is a statement about relative likelihood over decades, not a prediction of date, and a segment that has just ruptured is the least likely to fail again soon.

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