Relation between α(E) (see the color bar at the top) for the peak flux and two parameters, γ (y-axis) and β (x-axis), in four different energy ranges shown in panels (a)–(d). The solid white line represents the mean value derived for Group B events, and the dashed white lines indicate the mean value plus and minus the standard deviation. The scaling factor of the diffusion parameter κ₀ was fixed in this case to 10¹⁹ cm²/s. An animated version of this figure including results from different κ₀ ranging from 10¹⁷ to 10²⁰ cm²/s is available online.