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The spiral interplanetary magnetic field - A polarity and sunspot cycle variationSpacecraft observations near the earth of the average direction of the interplanetary magnetic field during the sunspot maximum year 1968 showed a deviation from the spiral field of Parker's classical description. The included angle between the average field direction when the field polarity was away from the sun and the average direction when the field polarity was toward the sun was 168 deg, rather than 180 deg as predicted by Parker. This effect appears to have a sunspot cycle variation.
Document ID
19740062238
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Svalgaard, L.
Wilcox, J. M.
(Stanford University Stanford, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
October 4, 1974
Publication Information
Publication: Science
Volume: 186
Subject Category
Space Sciences
Accession Number
74A44988
Funding Number(s)
CONTRACT_GRANT: NSF GA-31138
CONTRACT_GRANT: NGR-05-020-559
CONTRACT_GRANT: N00014-67-A-0112-0068
Distribution Limits
Public
Copyright
Other

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