Using the daily observation of the photosphere performed by the Equatorial Spar of INAF - Catania Astrophysical Observatory, we provide an indication of the probabilities that each sunspot group visible on the solar disc may host solar flares of C-, M- and X- class.
The probabilities shown below are calculated using the USSPS acquired on 11 October 2018 at 07:0 UT. They are valid for the subsequent 24 hours.
The sunspot groups capability of hosting flares is based on the Poisson statistic of five parameters: number of sunspots and pores, projected area of sunspot group in tens of millionths of the solar hemisphere, group type according to Zurich classification, type of penumbra of the main sunspot, and relative importance between leading sunspot and density of the sunspot population.
Catania Sunspot Group
Osservatorio Astrofisico di Catania
Via S.Sofia 78, 95123 Catania ITALY
Phone: (+39) 0957332111; FAX: (+39) 095330592
E-Mail (PEC): firstname.lastname@example.org