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

Creative Commons License

KILÇIK A., SAHIN S.

TURKISH JOURNAL OF PHYSICS, cilt.41, sa.4, ss.351-358, 2017 (ESCI) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 41 Sayı: 4
  • Basım Tarihi: 2017
  • Doi Numarası: 10.3906/fiz-1704-4
  • Dergi Adı: TURKISH JOURNAL OF PHYSICS
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.351-358
  • Anahtar Kelimeler: Solar flare, sunspot evolution, sunspots
  • Akdeniz Üniversitesi Adresli: Evet

Özet

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.