Periodical patterns in major flare occurrence and their relation to magnetically complex active regions (CROSBI ID 116800)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Temmer, Manuela ; Veronig, Astrid ; Rybak, Jan ; Brajša, Roman ; Hanslmeier, Arnold
engleski
Periodical patterns in major flare occurrence and their relation to magnetically complex active regions
A periodical occurrence rate of major solar flares (observed in hard X-rays) of ~24 days (synodic) was first reported by Bai (1987) for the years 1980-1985. Here we report a significant relation between the appearance of 24-day period in major H-alpha flares and magnetically complex sunspot groups (i.e., including a gamma and/or delta configuration). From synoptic maps of magnetograms (NSO/KP) patterns in the magnetic flux evolution are traced which might be the cause of the 24-day period observed in flare activity.
solar flares; solar activity; magnetic fields
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