Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Fine structure in the sunspot spectrum-2 to 70 years

  • 43 Accesses

  • 44 Citations


Application of a new data adaptive approach to power spectrum estimation has yielded evidence for a double solar cycle line in the Zurich sunspot time history. There is significant power from 8 to 15 yr in the spectrum with the primary line at 11.1 yr and three attendant multiplets that may be significant. The first four harmonics of the solar cycle are detected too. Quite marginal evidence for a peak at ∼65 yr in the spectrum is presented. These results closely correspond to those recently found in the geomagnetic spectrum.

This is a preview of subscription content, log in to check access.


  1. Anderson, C. N.: 1939,J. Geophys. Res. 44, 175.

  2. Banks, R. J. and Bullard, E. C.: 1966,Earth Planet. Sci. Letters 1, 118.

  3. Bendat, J. S. and Piersol, A. G.: 1966,Measurement and Analysis of Random Data, John Wiley and Sons, Inc., New York.

  4. Blackman, R. B. and Tukey, J. W.: 1959,The Measurement of Power Spectra, Dover Publ., Inc., New York.

  5. Braginskiy, S. I.: 1970a,Geomagnetizm i Aeronomiya 10, 1.

  6. Braginskiy, S. I.: 1970b,Geomagnetizm i Aeronomiya 10, 172.

  7. Burg, J. P.: 1968, ‘A New Analysis Technique for Time Series Data’, paper presented at NATO Advanced Study Institute on Signal Processing, Enschede, The Netherlands.

  8. Chapman, S. and Bartels, J.: 1940,Geomagnetism, Vols. 1 and 2, Oxford Univ. Press, London.

  9. Chernosky, E. J.: 1966,J. Geophys. Res. 71, 965.

  10. Chernosky, E. J. and Hagan, M. P.: 1958,J. Geophys. Res. 63, 775.

  11. Currie, R. G.: 1966,J. Geophys. Res. 71, 4579.

  12. Currie, R. G.: 1968,J. Geophys. Res. 73, 2779.

  13. Currie, R. G.: 1973,Astrophys. Space Sci. (in press).

  14. Eckhardt, D. H., Larner, K., and Madden, T.: 1963,J. Geophys. Res. 68, 6279.

  15. Fraser-Smith, A. C.: 1972,J. Geophys. Res. 77, 4209.

  16. Granger, C. W. F. and Hatanaka, M.: 1964,Spectral Analysis of Economic Time Series, Princeton Univ. Press, Princeton.

  17. Hirshberg, J. and Colburn, D. S.: 1969,Planetary Space Sci. 17, 1183.

  18. Lacoss, R. T.: 1971,Geophysics 36, 661.

  19. Levinson, N.: 1948,J. Math. Phys. 25, 261.

  20. Menzel, D. H.: 1949,Our Sun, J. and A. Churchill, Ltd., London.

  21. Ness, N. F.: 1971, ‘Review of Magnetic Field Variations’, X-690-71-465 preprint, NASA Goddard Space Flight Center, Greenbelt, Maryland.

  22. Peacock, K. L. and Treitel, S.: 1969,Geophysics 34, 155.

  23. Robinson, E. A.: 1967,Statistical Communication and Detection with Special Reference to Digital Data Processing of Radar and Seismic Signals, Hafner Publ. Co., New York.

  24. Shapiro, R. and Ward, F.: 1962,J. Atmospheric Sci. 19, 506.

  25. Singleton, R. C.: 1969,IEEE Trans. Audio Electroacoustics AU-17, 93.

  26. Stockham, Jr. T. G.: 1969, in B. Gold and C. M. Rader (eds.),Digital Processing of Signals, McGraw-Hill Co., New York.

  27. Toman, K.: 1966,J. Geophys. Res. 71, 3285.

  28. Ulrych, T. J.: 1972,J. Geophys. Res. 77, 1396.

  29. Westcott, P.: 1964,J. Atmospheric Sci. 19, 572.

  30. Wiener, N.: 1966,Extrapolation, Interpolation, and Smoothing of Stationary Time Series, M.I.T. Press, Cambridge, Mass. U.S.A.

  31. Wilcox, J. M. and Scherrer, P. H.: 1972,J. Geophys. Res. 77, 5385.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Currie, R.G. Fine structure in the sunspot spectrum-2 to 70 years. Astrophys Space Sci 20, 509–518 (1973). https://doi.org/10.1007/BF00642220

Download citation


  • Power Spectrum
  • Fine Structure
  • Time History
  • Solar Cycle
  • Significant Power