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The nature of relativistic electron intensity changes during solar flare quiet times between 1963 and 1969Time variations of the 3-12 MeV interplanetary electron intensity, observed by the Explorer-18, -28, and -33 spacecrafts, have been studied in detail. Apart from solar flare effects, there are five distinct periods when the electron intensity has undergone a series of increases, and these are strongly correlated with solar rotation. The intensity increases are separate phenomena, and are strikingly anticorrelated with increases in the low energy solar proton intensity. The electron energy spectrum during those quiet-time increases is typically represented by dJ/dE = k E/2.0 + or - 0.25 similar to the galactic electron spectrum. There are, in addition, Forbush decreases in the electron intensity frequently coincident with those in the neutron monitor. It is concluded that these characteristics all support the hypothesis of a galactic origin for the electrons observed during quiet-time increases.
Document ID
19720004080
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mcdonald, F. B. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Cline, T. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Simnett, G. M. (Calif. Univ. Riverside, United States)
Date Acquired
August 6, 2013
Publication Date
November 1, 1971
Publication Information
Publication: Goddard Space Flight Center Contrib. to the Twelfth Intern. Conf. on Cosmic Rays
Subject Category
Space Radiation
Accession Number
72N11729
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19720004069Collected WorksGoddard Space Flight Center Contributions to the Twelfth International Conference on Cosmic Rays
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