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The epicentre of an earthquake is the point

  • A.on the surface vertically above the focus
  • B.within the earth where the rupture begins
  • C.at which the greatest damage always occurs
  • D.where the first seismograph recorded the event

Answer: A

Correct answer: on the surface vertically above the focus

The epicentre is a purely geometric construction: drop a vertical line from the focus and the point where it meets the surface is the epicentre. It is convenient for mapping but it is not necessarily where the worst damage occurs, since damage depends on soil, on construction and on the direction the rupture propagated as well as on distance.

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