Energy dependence of the average SEP flux evaluated using different sources: Megayear-averaged flux estimated from lunar data (gray) (Poluianov et al. 2018), ⟨F⟩_∞ based on the combined direct and CI-proxy datasets (green; Fig. 1), similar to the green line, including CI-proxy data, but with the direct data for SC 24 alone ⟨F^*⟩_∞ (blue), directly measured average fluxes for SC 22–24 (green stars) (Raukunen et al. 2022), and the directly measured average fluxes for SC 24 (blue dots) (Raukunen et al. 2022). Uncertainties are for the full range for the lunar data and 68% c.i. for the other reconstructions. The plotted flux values are listed in Table 1.