May 1, 1998

• No plasmasphere.
  
• Normal convection as indication of the location of electron plasma sheet entry.
  
• Shock observed at 22UT (post-dusk) by 1990-095 (Shock observed at 2120UT by WIND with northward IMF).
  
• Plasmasphere refilling (1990-095) at 2050-2300UT (enhancement at 22UT)
  
• PC pulsations sloshing cold plasma at 22-23UT on 1990-095.
  
• Plasma sheet entry (1990-095) from southward IMF at ~2250 UT.
  
• Growth phase dropped out on 1990-095 at ~2300-2415 UT (pre-midnight).

• Plasmaspheric draining plumes across the dayside. Plasmaspheric plumes at around noon (0450 UT) on 1994-084; fast reaction on southward IMF turning at 0335UT by WIND.
  
• Magnetosheath/low-latitude boundary layer encounter at ~1245 and 1330UT on 1991-080. The draining plume is adjacent to the magnetosheath ions. The plasmaspheric ions flow westward.
  
• Strong convection; electron plasma sheet entry before dusk.
  
• Oscillated plasmaspheric ions flow west-east alternately at ~5-6UT (pre-noon) on 1994-084.
  
• Plasma sheet enhancement at ~15UT (post-dusk). Ion plasma sheet temperature is ~10keV.
  
• Spacecraft charging to 100's volts (ion lines were seen) at ~16UT to the end of the day on 1994-084 and LANL-97a.
  
• High plasma sheet densities (n ~ 3 cm-3) at the end of the day on LANL-97a and 1994-084.

• Strong convection; electron plasma sheet entry before dusk.
  
• Plasma sheet densities are high at the beginning of the day.
  
• Magnetosheath/low-latitude boundary layer across on the dayside at 4-8UT with southward IMF.
  
• Plasmaspheric ions are adjacent to the magnetosheath ions. Plasmasphere is drain out.
  
• Convection surge rush at electron plasma sheet at ~12UT on 1994-084 and LANL-97a (nearby), which may be associated with the substorm injection.
  
• Enhancement of the plasma sheet at ~18UT was associated with the substorm injection. Shock at 17UT by WIND.
  
• Big substorm at ~21UT, which shown on SOPA high-energy electron data; penetrating radiation after ~21UT.
  
• Spacecraft charging to 100's volts (ion lines were seen) at ~1830UT on both 1994-084 and LANL-97a.

• Penetrating radiation during 0-3UT.
  
• Spacecraft charging to 100's volts at 0-4UT on 1994-084.
  
• Magnetosheath across on the dayside at ~3-8UT. Shock turning at 0225UT by WIND with southward IMF (solar wind density and velocity were enhanced).
  
• Three enhancements of magnetosheath ions (adjacent to the plasmaspheric ions) at ~0540, 0655, and 0720 UT on 1991-080, 1994-084, and LANL-97a are associated with the enhanced solar wind densities at ~0500, 0630, and 0700 UT by WIND.
  
• Two species of low-energy ions (mainly westward) appear at ~1340-1630 LT on 1994-084.
  
• Strong convection; electron plasma sheet entry before dusk at ~12UT.
  
• Rush at electron plasma sheet at ~12UT on both 1994-084 and LANL-97a (nearby), which was associated with the substorm injection.
  
• Enhancement of the electron plasma sheet at ~16UT was associated with the substorm injection.

• Plasmaspheric draining plumes across the dayside at ~11-15LT seen on 1994-084 and LANL-97A. The plumes were structured in density (lumpy). The location of the plasmaspheric plumes began to retrieve to dusk.
  
• Electron plasma sheet entry at ~18LT indicated strong convection (Kp ~ -6). The few hour gap (electron trough) between draining plumes and electron plasma sheet entry.
  
• Enhancement of the plasma sheet at ~17UT is associated with substorm injection.
  
• Moderate level of penetrating radiation after ~17UT.
  
• Spacecraft charging to 100's volts at midnight region after ~17UT.

• No plasmasphere.
  
• Normal convection as indication of the location of electron plasma sheet entry.
  
• Moderate penetrating radiation throughout all day.

• Yi-Jiun Su
  
• Michelle Thomsen
  
• Joe Borovsky