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An experimental comprehensive flare index and its derivation for "major" flares, 1955-1969
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  • Description:
    "The abundance of different types of electromagnetic phenomena that accompany certain Ha flares has lead over the years to a felt need for a systematic organization of this information for the respective flares. The current "importance" evaluation of a flare refers only the Ha circumstances and primarily to flare area. In the absence of a more comprehensive evaluation of the flare event, the Ha importance often is used to indicate the magnitude of the phenomenon. It is possible that this is a good procedure, but there is a certain uneasiness that in this practice important information may be overlooked. A number of years ago, A. D. Fokker suggested the formulation of a radio frequency importance evaluation for flares. in Boulder, at the Space Environment Center of the Space Environment Laboratory, practical needs have led to the use of a flare classification that reflects the magnitude of the X-ray or ionizing radiation associated with the event. The current practice in the Quarterly Bulletin of showing correlated Ha flare, SID, and dynamic spectrum information in juxtaposition to the distinctive radio frequency events, further reflects the apparent need for comprehensive flare information"--Introduction.
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