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IPM
30
YEARS OLD

“School of Physics”

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Paper   IPM / P / 7878
School of Physics
  Title:   Multifractal Detrended Fluctuation Analysis of Sunspot Time Series
  Author(s): 
1 . M. S. Movahed
2 . G. R. Jafari
3 . F. Ghasemi
4 . S. Rahvar
5 . M. R. Rahimi Tabar
  Status:   Published
  Journal: J.Stat. Mech: Theory and Experiments
  No.:  02
  Vol.:  02
  Year:  2006
  Pages:   PO2003
  Supported by:  IPM
  Abstract:
We use the multifractal detrended fluctuation analysis (MF-DFA), to study the sunspot number fluctuations. We show that sunspot time series has a crossover time scale (s×), where the signal has different correlation exponents in time scales s > s× and s < s×. Comparing the MF-DFA results of the original time series to those for shuffled and surrogate series, we conclude that its multifractality nature is almost due to long-range correlations.

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