Quasi-Stationary Corotating Structure in the Interplanetary Medium (original) (raw)
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Abstract
A quasi-stationary corotating structure in the interplanetary magnetic field has been observed with the Imp 1 satellite during 3 solar rotations. The interplanetary field is directed predominantly away from the sun for 2/7 of a rotation, then toward the sun for 2/7 of a rotation, then away from the sun for 2/7 of a rotation, and finally toward the sun for 1/7 of a rotation. The interplanetary magnetic field magnitude and the solar wind velocity, density, and flux are discussed with regard to this sector structure. As the structure rotates past the earth once every 27 days it influences geomagnetic activity and cosmic-ray density. A recurring stream of protons of a few Mev energy is almost entirely contained within one sector. The solar source of the recurring geomagnetic storm of December 2, 1963, is associated with a ghost unipolar magnetic region in the solar photosphere.
Publication:
Journal of Geophysical Research
Pub Date:
December 1965
DOI:
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