a) Cumulative distribution of daily average intensities of 5–15 MeV n^-1 C (bottom), O (middle) and Fe (top). The quantities x₀ are the breakpoint intensities of the double power-law fits. Similarly to Fig. 2, the quantities t and p represent a test statistic calculated from the logarithmic difference of the breakpoint intensities and its probability value. b) Distribution of daily average 5–15 MeV n^-1 intensity ratios Fe/C (bottom), Fe/O (middle), and Fe/(C+O) (top). The dashed lines show the average values measured in gradual events, and the solid line in the top panel shows the gradual event value multiplied by two. In both figures, the colors and data omission are similar as in Fig. 2. All distributions have been normalized to account for the time SOHO/ERNE has been offline, and the SC23 distributions have been scaled down to account for the difference between the duration of SC23 and the measured duration of SC24 (until 30 June 2015).