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Solar Flare Increase of Cosmic Ray Intensity on November 22, 1977

Published online by Cambridge University Press:  25 April 2016

A. G. Fenton ,
K. B. Fenton  and
J. E. Humble
A. G. Fenton
Affiliation:
Physics Department, University of Tasmania
K. B. Fenton
Affiliation:
Physics Department, University of Tasmania
J. E. Humble
Affiliation:
Physics Department, University of Tasmania
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Extract

Solar flares for which protons of relativistic energies reach Earth are rare events compared with the number in which non-relativistic protons are produced. For instance, Shea and Smart (1978) have listed 139 proton events for the interval 1955-69 of which 17 were GLE’s (i.e. “ground level events” detected by the world network of cosmic ray neutron monitors). We have tentatively identified a further 11 GLE’s in the interval 1970-1977, of which 3 were in 1977 in the sunspot cycle which commenced about mid-1976 (cycle 21). Thus the average rate over the past two solar cycles has been a little over one per year.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 3 , Issue 3 , 1978 , pp. 238 - 241
Copyright
Copyright © Astronomical Society of Australia 1978

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References

Chupp, E. L., Forrest, D. J., Higbie, P. R., Suri, A. N., Tsai, C., and Dunphy, P.P., Nature, 241, 333 (1973).CrossRefGoogle Scholar
Duggal, S. P. and Pomerantz, M. A., J. Geophys. Res., 78, 7205 (1973).Google Scholar
Schatten, K. H., and Mullan, D. J., J. Geophys. Res., 82, 5609 (1977).CrossRefGoogle Scholar
Shea, M. A., and Smart, D. F., Report No. AFGL-TR-75-0177, Air Force Geophysics Laboratory, Hanscom AFB, Mass., U.S.A. (1975).Google Scholar
Shea, M. A., and Smart, D. F., Report No. AFGL-TR-78-0028, Air Force Geophysics Laboratory, Hanscom AFB, Mass., U.S.A. (1978).Google Scholar
Solar-Geophysical Data, 400 Part I, pages 10, 19, December 1977, U.S. Department of Commerce (Boulder, Colorado U.S.A. 80302).Google Scholar