Аннотация:The differential and integral distributions of the satellite-measured cycle 20-22 SEP events are
analyzed as relevant to the last million of years-long impact of the mean solar proton fluxes on
lunar rocks.(Reedy, 1966). The two sets of data indicate that the SEP event distribution function
gets steeper as the SEP fluence size increases. The distribution can be described by a power-law
function with exponential steepening for large fluences. The parameters have been found for the
distribution that covers the ³30 MeV solar proton fluence range from 106 to 1011 cm-2.