We present Isee 1 observations of near equatorially mirroring ring current ions before and after the magnetic storm of November 25-26, 1977. The data are presented as phase space densities, f(s2/cm6), versus the first adiabatic invariant, m(MeV/G), for the L range ~2.7-8 RE. The m range covered varies from ~50-1000 MeV/G at L = 8 to ~1-100 MeV/G at L = 2.7. The prestorm phase space densities show an intensity peak at a m value which varies with L as mpeak~38 MeV/G for 5≲L≲8 and mpeak~10e0.7(L-3) for 2.7≲L≲5. Phase space densities remain nearly constant throughout the storm for m values greater that mpeak and are enhanced for m values less than mpeak. Thus high-energy ions respond adiabatically to the magnetic field changes caused by the low-energy ion enhancements. This result agrees with earlier Explorer 45 results (Lyons and Williams, 1976). The Isee 1 data are compared directly with the Explorer 45 data and are found to agree very well. The time difference of ~6 years and local time separation of ~12 hours between the two data sets lead to the conclusion that the ring current ion behavior presented here is a characteristic feature of geomagnetic storms.