CAOSP abstracts, Volume: 26, No.: 2, year: 1996

Abstract: The daily soft X-ray flare index was determined from the daily continuous profile of solar soft X-ray flux. In order to determine the heliographic coordinates of Long Duration Events (LDEs) we exploited the fact that the soft X-ray flare emission is uniquely tied with the occurrence of H-alpha flares. The daily flare index is given in Tables 1 and 2. They contain the Eastern (E), Central (C) and Western (W) indices of an LDE as well as a daily flare index of the impulsive (I) flares, observed from January 1969 to December 1972.

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