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Science 18 June 1965:
Vol. 148. no. 3677, pp. 1592 - 1594
DOI: 10.1126/science.148.3677.1592
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Articles

Sector Structure of the Quiet Interplanetary Magnetic Field

Norman F. Ness 1 and John M. Wilcox 2

1 Goddard Space Flight Center, Greenbelt, Maryland
2 Space Sciences Laboratory, University of California, Berkeley

Observations of the interplanetary magnetic field by the Imp-1 satellite have revealed a regular longitudinal sector structure in this field. The sectors co-rotate with the sun; as an average sector sweeps past the earth the magnitude of the interplanetary field decreases from greater than 6 gammas (1 gamma = 10-5 gauss) to less than 4 gammas, and the daily sum of the geomagnetic activity index, Kp, decreases from 25 to less than 10.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Solar and Interplanetary Magnetic Fields.
J. M. Wilcox (1966)
Science 152, 161-166
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Science. ISSN 0036-8075 (print), 1095-9203 (online)