| Abstract: | Very recently (Banerjee et al. in Astrophys. Space, doi:, 2011) the statistics of geomagnetic Disturbance storm (Dst) index have been addressed, and the conclusion from this analysis suggests
that the underlying dynamical process can be modeled as a fractional Brownian motion with persistent long-range correlations.
In this comment we expose several misconceptions and flaws in the statistical analysis of that work. On the basis of these
arguments, the former conclusion should be revisited. |
