Solar cycle variations in IMF intensity
Journal Article
·
· J. Geophys. Res.; (United States)
Annual averages of logarithms of hourly interplanetary magnetic field (IMF) intensities, obtained from geocentric spacecraft between November 1963 and December 1977, reveal the following solar cycle variation. For 2--3 years at each solar minimum period, the IMF intensity is depressed by 10--15% relative to its mean value realized during a broad 9-year period contered at solar maximum. No systematic variations occur during this 9-year period. The solar minimum decrease, although small in relation to variations in some other solar wind parameters, is both statistically and physically significant.
- Research Organization:
- NASA/GSFC, Laboratory for Extraterrestrial Physics Greenbelt, MD 20771
- OSTI ID:
- 5631335
- Journal Information:
- J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 84:A10; ISSN JGREA
- Country of Publication:
- United States
- Language:
- English
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