Possible variations in sunspot groups before flaring activity during solar cycles 23 and 24
TURKISH JOURNAL OF PHYSICS, vol.41, no.4, pp.351-358, 2017 (ESCI, Scopus, TRDizin)
- Publication Type: Article / Article
- Volume: 41 Issue: 4
- Publication Date: 2017
- Doi Number: 10.3906/fiz-1704-4
- Journal Name: TURKISH JOURNAL OF PHYSICS
- Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus, TR DİZİN (ULAKBİM)
- Page Numbers: pp.351-358
- Keywords: Solar flare, sunspot evolution, sunspots
- Open Archive Collection: AVESIS Open Access Collection
- Akdeniz University Affiliated: Yes
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 (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 (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.