We present measurements of energetic (~130 keV) O+ ions in the earth's magnetosphere during the two Coordinated Data Analysis Workshop 6 substorms on March 22, 1979. The behavior of thermal and suprathermal H+ (10--130 keV) and suprathermal He++ (30--130 keV/e) ions is also discussed. The observations were made with the University of Maryland/Max-Planck-Institut ultralow energy charge analyzer (ULECA) sensor on ISEE 1 at geocentric distances ~16 to 7 RE in the earth's magnetotail. Approximately 15 min before the 1054 UT onset of the first substorm, energetic O+ ions are observed streaming tailward. H+ and He++ ions at all energies were generally streaming tailward from ~1059 to 1115 UT, consistent with the presence of a near-earth neutral line during this interval. From 1117 to 1124 UT the H+ and He++ ions were observed flowing earthward, suggesting that at ~1117 UT the neutral line retreated tailward. A brief interval in the southern tail lobe, from ~1124 to 1126 UT, was highlighted by an intense O+ beam streaming tailward; the O+/H+ ratio at 130 keV was 7¿2. This suggests that high energy O+ ions may be accelerated directly out of the ionosphere. The recovery phase of the first substorm began a few minutes later and was characterized by large intensities of nearly isotropic suprathermal ions. The O+/H+ differential intensity ratio at 130 keV was quite large (~1) during the recovery phase of both substorms.