Magnetic midnight

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Magnetic midnight is the time of day when an observer on earth's surface, the North or South Magnetic Pole, and the sun are in alignment. This is best time for observing auroras.[1]

Because Earth's magnetic poles do not coincide with its geographical poles—the angle between Earth's rotation axis and magnetic axis is about 11° -- magnetic midnight differs from conventional midnight. In most of the United States, magnetic midnight occurs about an hour earlier.[2]

References[edit]

  1. ^ McGraw-Hill Encyclopedia of Science & Technology. Online August 7, 2008.
  2. ^ http://www.eaae-astronomy.org/WG3-SS/WorkShops/Auroras.html