| A reevaluation of solar flares, 1964-1966 - :7832 | NOAA Historical Materials
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A reevaluation of solar flares, 1964-1966
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  • Corporate Authors:
    United States, Environmental Science Services Administration., Research Laboratories. ; IGY World Data Center A: Upper Atmosphere Geophysics ;
  • Description:
    "In efforts to understand the cosmic environment of the earth, geophysicists often turn to tabulations of solar flares prepared by solar astronomers and Solar World Data Centers. The tabulations vary in time of issue and in degrees of completeness and reliability. All too often the user of flare data is confronted with conflicting reports or with disconcerting words of caution from solar astronomers who are especially aware of the many difficulties in the primary measurements and evaluations of the solar events. Through international cooperation, reports of solar flares from 45 or more different solar observatories are assembled in three Solar World Data Centers, and at one of them, the Meudon Observatory, final summaries are prepared with utmost care. The Quarterly Bulletin on Solar Activity contains the published tabulation of the flare summaries. Through 1967, the Quarterly Bulletin tables have included entries for all solar events for which any one observer reported the importance of the flare to be at least as great as one. Since 1963 many of the entries have been evaluated as subflares (flares of importance 1-) on the basis of the data from all of the reporting stations. Events reported unambiguously as subflares do not appear in the Quarterly Bulletin lists"--Introduction.

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