Approximate dates (in –BC/AD) of grand minima in reconstructed solar activity.
Approximate dates (in –BC/AD) of grand maxima in the SN-L series. (after Usoskin et al., 2007).
Estimates of omni-directional integral (above 30 MeV) flux, F30 in [cm2 s]–1, of solar energetic particles, obtained from different sources.
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