Abstract
SINCE November 1956 the use of a most elementary long-term prediction method1 for sunspot numbers has been pursued with surprising success. C. N. Anderson2 directed attention to the possible existence of a 169 years period in solar activity. The coincidence of values between the two periods 1749–85 and 1918–54 is most striking.
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References
Herrinck, P., Bull. Acad. Roy. Sci. Col., Nouvelle série, 4 (6). 1274 (1958).
Anderson, C. N., J. Geophys. Res., 59, No. 4 (1954).
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HERRINCK, P. Prediction of Sunspot Numbers until the End of the Present Cycle. Nature 184, 51–52 (1959). https://doi.org/10.1038/184051b0
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DOI: https://doi.org/10.1038/184051b0
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