From Reference [10], «[t] he table below gives estimates of the particle flux
at a time of
minimum sunspot activity (when the flux is highest, as in 1965, 1977, 1987 [listed under the heading «max» in the table below]-RRB- and also (in italics) for a
period of near maximum solar activity (low flux — though there is no well - defined
absolute minimum [listed under the heading «min» in the table below]-RRB-... [The fluxes in columns 2 through 5] are quoted for protons and....