auroral isochasm
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auroral isochasm
(ə′rör·əl ′ī·sō′kaz·əm)
(geophysics) A line connecting places of equal auroral frequency, averaged over a number of years.
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auroral isochasm
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McGraw-Hill Science & Technology Dictionary
McGraw-Hill Dictionary of Scientific and Technical Terms. Copyright © 2003, 1994, 1989, 1984, 1978, 1976, 1974 by McGraw-Hill Companies, Inc. All rights reserved.
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