Forbush decrease

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For′bush de`crease

(ˈfɔr bʊʃ)
the sudden decrease in the intensity of cosmic rays after an increase in solar activity. Also called For′bush effect`.
[after Scott E. Forbush (b. 1904), U.S. physicist]
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References in periodicals archive ?
A Forbush Decrease (FD) is a global transient decrease in Galactic Cosmic-Ray (GCR) intensity followed by a substantially slower recovery.
Researchers set out to determine the effects on clouds of "Forbush decreases"--quick drops in the intensity of galactic cosmic rays following coronal mass ejections that occur when the solar wind's magnetic field pushes the cosmic rays away from Earth.
The first task for a successful hunt was to work out when "tigers" were most likely to show themselves, by identifying the most promising instances of sudden drops in the count of cosmic rays, called Forbush decreases. Previous research in Copenhagen predicted that the effects should be most notice-able in the lowest 3000 meters of the atmosphere.