Statistical properties of dissipation bursts within turbulence: Solar flares and geomagnetic activity

Details Statistical properties of dissipation bursts within turbulence: Solar flares and geomagnetic activity Statistical properties of dissipation bursts within turbulence: Solar flares and geomagnetic activity

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004p%26ss...52..957l&link_type=abstract

Planetary and Space Science, Volume 52, Issue 10, p. 957-962.

Mathematics

Probability

5

Geomagnetic Activity, Mhd Turbulence, Solar Flares

Scientific paper

We investigate some statistical properties of the solar soft X-ray flux and of the Auroral Electrojet (AE) index. For both these signals, the probability density functions (PDFs) of normalized differences are shown to display wide, non-Gaussian tails. The shape of the PDFs is nearly unchanged as the timelag, used to calculate differences, varies. Moreover, the two time series are characterized by a power-law distribution for waiting times between successive bursts and by a clear departure from an hypothesis of locally Poisson statistics. A similar behavior is found in a shell model of magnetohydrodynamic (MHD) turbulence.

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