Multifractal fluctuation function F_q(n) obtained from MFDMA for the active (left panels) and quiet (right panels) Sun. Each curve corresponds to different fixed values of ﹩q=-5,\ldots ,5﹩ from top to bottom, while top bold, middle bold, and the bottom bold lines correspond to ﹩q=5,q=0﹩, and ﹩q=-5﹩, respectively. Black lines are shuffled data and red lines are original data (top). Comparison of the multifractal scaling exponent ﹩\tau (q)﹩ of the original (red), shuffled (green), and surrogate (blue) time series (left-bottom). Multifractal spectrum ﹩f(\alpha )﹩ of the the original (red), shuffled (green). and surrogate (blue) time series. The solid curves represent the best fourth-order fit (right-bottom).