(a)–(d) An example of a bow-shock crossing event around 21:34 UT on 1998 October 25: omnidirectional electron fluxes at ∼0.1–180 keV (a), IMF magnitude (b), solar wind proton bulk speed (c), and solar wind proton number density (d). The vertical blue (black) lines mark the interval at 21:34–21:39 UT (21:06–21:16 UT), during which the average shocked (ambient) suprathermal electron fluxes are obtained. (e)–(g) Examples of electron energy spectra for Groups A, B, and C, respectively. Solid symbols indicate the ambient spectra, while open symbols denote downstream shocked spectra for Group A (open triangles), B (open squares), and C (open circles). Different spectral shapes of downstream shocked electrons are color-coded as follows: green (TPL), yellow (ER), dark blue (DDPL), light blue (SPL), pink (UDPL), and gray (unfitted). The spectra are scaled by different multiplicative factors for clarity.