• DOI:10.1007/S11207-009-9380-3
Corpus ID: 123078108

Evidence of 6 000-Year Periodicity in Reconstructed Sunspot Numbers

@article{Xapsos2009EvidenceO6,
  title={Evidence of 6 000-Year Periodicity in Reconstructed Sunspot Numbers},
  author={M. A. Xapsos and E. Burke},
  journal={Solar Physics},
  year={2009},
  volume={257},
  pages={363-369}
}

M. A. Xapsos, E. Burke

Published 2009

Physics

Solar Physics

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Reconstructed sunspot data are available that extend solar activity back to 11 360 years before the present. We have examined these data using Hurst analysis, a moving average filter, and Fourier analysis. All of the procedures indicate the presence of a long term (≈6 000 year) cycle not previously reported. A number of shorter cycles formerly identified in the literature by using Fourier analysis, Bayes methods, and maximum entropy methods were also detected in the reconstructed sunspot data.