Intermediate-term periodicities in solar
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R. Oliver; M. Carbonell; J. L. Ballester
📂
Article
📅
1992
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Springer
🌐
English
⚖ 731 KB
The presence of intermediate-term periodicities in solar activity, at approximately 323 and 540 days, has been claimed by different authors. In this paper, we have performed a search for them in the historical records of two main indices of solar activity, namely, the daily sunspot areas (cycles 12-