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Recent and Historical Solar Proton Events

Published online by Cambridge University Press:  18 July 2016

M. A. Shea
Affiliation:
Space Physics Division, Geophysics Directorate/Phillips Laboratory, Hanscom Air Force Base Bedford, Massachusetts 01731-5000 USA
D. F. Smart
Affiliation:
Space Physics Division, Geophysics Directorate/Phillips Laboratory, Hanscom Air Force Base Bedford, Massachusetts 01731-5000 USA
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Abstract

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A study of the solar proton event data between 1954 and 1986 indicates that the large fluence events at the Earth are usually associated with a sequence of solar activity and related geomagnetic storms. This association appears to be useful to infer the occurrence of major fluence proton events extending back to 1934, albeit in a non-homogeneous manner. We discuss the possibility of identifying major solar proton events prior to 1934, using geomagnetic records as a proxy.

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Copyright © The American Journal of Science