Key Points:
- The reversed energy spectra of ring current protons were observed by
RBSPICE to show the distinct flux minima ~50 - 100 keV
and flux maxima ~200 - 400 keV.
- The reversed proton energy spectra mostly occur inside the
plasmasphere during geomagnetically quiet periods.
- The global distributions of reversed proton energy spectra suggest the
underlying contributions of various physical processes.