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Roughly what fraction of all lightning flashes are cloud to ground?

  • A.about a half
  • B.nearly all of them
  • C.about a quarter
  • D.about three quarters

Answer: C

Intracloud discharges outnumber cloud to ground flashes by a factor of about three. The ratio varies with latitude and with the depth of the storms involved. Deeper storms produce proportionally more intracloud flashes.

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