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Comments on a formula describing the secular course of sunspot activity

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Abstract

A method proposed by Henkel for long-term forecasting of solar activity is discussed. The prediction formula is interpreted as the equation of an oscillatory motion of nonstationary character. Estimates of the predictive accuracy are given.

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References

  • Gleissberg, W.: 1976, Kleinheubacher Berichte 19, 661.

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  • Henkel, R.: 1971, Solar Phys. 20, 345.

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  • Kendall, M. G. and Stuart, A.: 1968, The Advanced Theory of Statistics, Vol. 3, chapter 47, Griffin, London.

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  • Yule, G. U.: 1927, Philos. Trans. Ser. A 226, 267.

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Authors and Affiliations

  1. Astronomical Institute, University of Frankfurt am Main, F.R.G.

    K. H. Schroeter

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  1. K. H. Schroeter
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Schroeter, K.H. Comments on a formula describing the secular course of sunspot activity. Sol Phys 50, 501–504 (1976). https://doi.org/10.1007/BF00155311

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  • DOI: https://doi.org/10.1007/BF00155311

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