A statistical analysis of sunspot groups hosting M and X flares

Details A statistical analysis of sunspot groups hosting M and X flares A statistical analysis of sunspot groups hosting M and X flares

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006an....327...36t&link_type=abstract

Astronomische Nachrichten, Vol.327, Issue 1, p.36-43

Mathematics

Probability

10

Sun: Activity, Sun: Flares, Sunspots

Scientific paper

In this paper we present the results obtained from a statistical analysis carried out by correlating sunspot-group data collected at the INAF-Catania Astrophysical Observatory and in the NOAA reports with data on M and X flares obtained by the GOES-8 satellite in the soft X-ray range during the period January 1996-June 2003. These results allow us to provide a quantitative estimate of the parameters typical for an active region with very energetic flares. Moreover, the analysis of the flare productivity as a function of the group evolutionary stage indicates that the flaring probability of sunspots slightly increases with the spot age during the first passage across the solar disk, and that flaring groups are characterized by longer lifetimes than non-flaring ones.

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