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Periodicities in Solar Flare Index for Cycles 21 – 23 Revisited

✍ Scribed by A. Kilcik; A. Özgüç; J. P. Rozelot; T. Ataç

Publisher
Springer
Year
2010
Tongue
English
Weight
998 KB
Volume
264
Category
Article
ISSN
0038-0938

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Periodic behavior of solar flare index during solar cycles 20 and 21
✍ Atila Özgüç; Tamer Ataç 📂 Article 📅 1989 🏛 Springer 🌐 English ⚖ 434 KB

Short-term periodicities of solar activity were studied with the flare index by using Discrete Fourier Transform for the time interval 1966-1986. Two noticeable periodicities (18.5 and 5 months) have been found. The existence of these periodicities comparing with the early findings is discussed.