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A 153 day periodicity in the occurrence of solar flares producing energetic interplanetary electrons
Droege, Wolfgang; Gibbs, Kenneth; Grunsfeld, John M.; Meyer, Peter; Newport, Brian J.; Evenson, Paul; Moses, Dan
AA(Chicago, University, IL), AB(Chicago, University, IL), AC(Chicago, University, IL), AD(Chicago, University, IL), AE(Chicago, University, IL)
NASA and University of New Hampshire, Workshop on Impulsive Solar Flares, 2nd, Durham, NH, Sept. 26-28, 1988 Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 73, June 1990, p. 279-283. Research supported by the W. D. Grainger Foundation. (ApJS Homepage)
Publication Date:
Solar Physics
NASA/STI Keywords:
High Energy Electrons, Interplanetary Medium, Solar Flares, Gamma Rays, International Sun Earth Explorer 3, Power Spectra, Solar X-Rays
Bibliographic Code:


The occurrence times of energetic (above 10 MeV) solar flare electron events observed on board the ISEE 3 spacecraft during the years 1978-1982 have been examined; strong evidence is found for a periodicity of 153 + or - 2 days, confirming the discovery of a periodicity in the occurrence of solar flares producing X-rays and gamma rays. The Rayleigh test for periodicity is applied to obtain a probability of less than 10 to the -6th that the times of the electron flares were drawn from a uniform distribution.

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