Figure 2: One example for the entry plasmas observed at the high-latitude magnetosphere on 8 September 2002.
From: Solar wind entry into the high-latitude terrestrial magnetosphere during geomagnetically quiet times
(a) The hot ion energy spectrogram; (b) the electron energy spectrogram; (c) the hot ion density for C1 and C3; (d) the magnetic field in the GSM coordinate system, and (e) the solar wind magnetic field in GSM. The blue bar marks the duration for the cusp crossing, whereas the orange bar indicates the magnetotail plasma sheet. The high-latitude magnetosphere (where the lobe region is located), which is traditionally thought to have cold and tenuous plasmas with few entering solar wind plasmas, was observed between these two regions. The intervals of entry plasmas are indicated within this region and correspond to times when the solar wind magnetic field (d) is directed northward. More information can be found in Supplementary Fig. S1. Lowest threshold values of the energy flux are set to plot (a) and (b).
