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magnetic field reversals

magnetic field reversals in Culture

magnetic field reversals definition


Changes in direction or orientation of the magnetic field of the Earth that have occurred from time to time. (Several hundred are known in the geological record.) Sometimes the north magnetic pole is near the geographic North Pole and sometimes near the South Pole in Antarctica.

Note: The causes of these reversals are not known in detail, but are thought to be related to the motion of fluids in the Earth's core.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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