Journal article Open Access

Evidence of 6 000-Year Periodicity in Reconstructed Sunspot Numbers

Xapsos, M. A.; Burke, E. A.


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  <dc:creator>Xapsos, M. A.</dc:creator>
  <dc:creator>Burke, E. A.</dc:creator>
  <dc:date>2009-05-27</dc:date>
  <dc:description>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.</dc:description>
  <dc:identifier>https://zenodo.org/record/1232840</dc:identifier>
  <dc:identifier>10.1007/s11207-009-9380-3</dc:identifier>
  <dc:identifier>oai:zenodo.org:1232840</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>https://creativecommons.org/publicdomain/zero/1.0/legalcode</dc:rights>
  <dc:title>Evidence of 6 000-Year Periodicity in Reconstructed Sunspot Numbers</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
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