Periodic behavior of solar flare index during solar cycles 20 and 21 |
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| Authors: | Atila Özgüç Tamer Ataç |
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| Institution: | (1) Kandilli Observatory, Bogaziçi University, Çengelköy, Istanbul, Turkey |
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| Abstract: | 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. |
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