Quiet-time energy spectra observed near solar minimum at 1.0 au on the Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) satellite in 1992–1993; colored shading approximately separates three energy regimes and their associated spectra. Left: low energy “turn-up” spectra of undetermined origin. Center: anomalous cosmic ray O and C. Right: modulated GCRs. The figure is adapted from Mewaldt et al. (1993).