Possible variations in sunspot groups before flaring activity during solar cycles 23 and 24

Authors : Ali KILÇIK, Seray ŞAHİN

Pages : 351-358

View : 19 | Download : 8

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :We investigated the possible morphological variations observed in sunspot groups on the day before flaring activity occurred between January 1996 and November 2014. We found that 77% of all flaring sunspot groups were large and complex insert ignore into journalissuearticles values(D, E, and F modified Zurich classes);. In addition, the Zurich classification of A, B, and C class sunspot groups changed more than 50%, while the remaining groups insert ignore into journalissuearticles values(D, E, F, and H); did not change considerably before the flare activity. Results showed that there was a remarkable increase in the sunspot areas of groups D, E, and F; in contrast, the sunspot areas of groups A, B, C, and H showed a decrease before the flaring activity during the examined time period. Finally, the sunspot counts of groups A, C, and H showed a decrease, while groups B, D, E, and F showed an increase in the same period.
Keywords : Solar flare, sunspot evolution, sunspots