Persistence of solar activity on small scales: Hurst analysis of time series coming from Hα flares

Details Persistence of solar activity on small scales: Hurst analysis of time series coming from Hα flares Persistence of solar activity on small scales: Hurst analysis of time series coming from Hα flares

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000soph..197..149l&link_type=abstract

Solar Physics, v. 197, Issue 1, p. 149-156 (2000).

Physics

11

Scientific paper

We calculated the Hurst exponent H for the daily averaged intensity Q of optical flares, an index which describes the solar activity. We found that H~=0.74+/-0.02 in the range of scales from about 20 days up to 450 days. This value is well beyond H=\tfrac 12, expected for a stochastic Brownian process, thus indicating that the solar cycle could show persistence on small scales, in agreement with what has been found using other indices of the solar cycle.

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