proton ring current

Summers, D., Shi, R., Engebretson, M., Oksavik, K., Manweiler, J., & Mitchell, D. (2017). Energetic proton spectra measured by the Van Allen Probes. Journal Of Geophysical Research: Space Physics. http://doi.org/10.1002/2017JA024484 (Original work published September 2017)