Other
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.4104b&link_type=abstract
American Astronomical Society, 180th AAS Meeting, #41.04; Bulletin of the American Astronomical Society, Vol. 24, p.794
Other
Scientific paper
The three-parameter McIntosh active region classifications were examined to derive the effective contribution to solar flare production of each of the classification parameters. Published tables of average flare rates for the original 63 McIntosh classifications were used, and both linear and multiplicative contributions to the flare rates were tested. However, while trying to solve for the flare contributions, difficulties were encountered because some combinations of the original McIntosh parameters were redundant. In addition, earlier studies indicated an excessive amount of noise in the reported classifications. This suggested that the classifications may be too specific and that a more general set of classifications might be sufficient for flare predictions. Therefore, 5 years of classification data were examined and used to identify possible combinations of classification parameters that could be either eliminated entirely, merged with other classes, or renamed. With these minor changes to the existing classifications, it was then possible to solve for the flare contributions; the best fit was found when the contributions were assumed to be multiplicative. This suggests that non-linear processes amplify the flare potential associated with the different active region properties. The contributions to the flare rates can be visualized as the spacing of the classification parameters along three axes. The resulting flare rate is then a combination of the location of the class along each axis. This suggests a possible interpolation scheme that can be used when conflicting classifications have been assigned or when the region's properties lie near the value that separates classification parameters.
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