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A Solar Cycle Variation of the Interplanetary Magnetic Field by G. L. Siscoe; N. U. Crooker; L. Christopher is a Physics and Astronomy article available to read on EtoBox.

What is A Solar Cycle Variation of the Interplanetary Magnetic Field about?

Measurements of the north-south (Bz) component of the interplanetary field as compiled by King (1975) when organized into yearly histograms of the values of IBz[ reveal the following. (1) The histograms decrease exponentially from a maximum occurrence frequency at the value IBz I = 0. (2) The slope of the exponential on a semi-log plot varies systematically roughly in phase with the sunspot number in such a way that the probability of large values of IBz I is much greater in the years near sunspot maximum than in the years near sunspot minimum. (3) There is a sparsely populated high-value tail, for which the data are too meager to discern any solar cycle variation. The high-value tail is perhaps associated with travelling interplanetary disturbances. (4) The solar cycle variations of Bz and the ordinary indicators of solar activity are roughly correlated. (5) The solar cycle variation of B~ is distinctly different than that of the solar wind speed and that of the geomagnetic Ap disturbance index. \* Now at the Aerospace Corporation, E1 Segundo, Calif. 90245, U.S.A.

Who reads A Solar Cycle Variation of the Interplanetary Magnetic Field?

Author

G. L. Siscoe; N. U. Crooker; L. Christopher

Publisher

Springer; Springer-Verlag; Kluwer Academic Publishers; Springer Science and Business Media LLC (ISSN 0038-0938)

Published

1978

Language

EN

Field

Physics and Astronomy (Physical Sciences)