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Most earthquakes are classified as

  • A.collapse
  • B.explosion-induced
  • C.tectonic
  • D.volcanic

Answer: C

Correct answer: tectonic

The great majority of earthquakes, and virtually all the damaging ones, come from sudden slip on faults as accumulated tectonic strain is released. The other classes exist but are minor: volcanic earthquakes are small and local, collapse earthquakes smaller still, and induced events from reservoirs, mining or fluid injection are limited in size by the volume involved.

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