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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

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