Comparisons are made between energetic electron spectra obtained in the inner belt(L=1.3-2.4) by the Ogo 5 satellite during 1968 and spectra acquired by other magnetic spectrometer experiments before and after the Starfish high-altitude nuclear detonation on July 9, 1962. The post-Starfish data show a continual decay at the higher energies (>0.5 for 1962 to ?1 MeV for 1968). Electrons of 2-MeV energy at L 1.4 showed a mean life of 1 year. By 1968, only a high-energy residual (>1 MeV) remained in the inner belt (L?1.4). A pre-Starfish spectrum obtained in 1961 at L=1.38 is almost identical with out 1968 results for the same region. By 1968, Starfish electrons were no longer important as an aspect of inner-belt dynamics. |