the seed population

Tang, C., Wang, Y., Ni, B., Zhang, J. -C., Reeves, G., Su, Z., et al. (2017). Radiation belt seed population and its association with the relativistic electron dynamics: A statistical study. Journal Of Geophysical Research: Space Physics. http://doi.org/10.1002/2017JA023905 (Original work published May 2017)
Tang, C., Xie, X., Ni, B., Su, Z., Reeves, G., Zhang, J. -C., et al. (2018). Rapid Enhancements of the Seed Populations in the Heart of the Earth\textquoterights Outer Radiation Belt: A Multicase Study. Journal Of Geophysical Research: Space Physics. http://doi.org/10.1029/2017JA025142 (Original work published June 2018)