The Spiral Interplanetary Magnetic Field: A Polarity and Sunspot Cycle Variation
- 4 October 1974
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 186 (4158) , 51-53
- https://doi.org/10.1126/science.186.4158.51
Abstract
Spacecraft 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°, rather than 180° as predicted by Parker. This effect appears to have a sunspot cycle variation.Keywords
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