Overview of ESP event observed by SolO on 14 March 2023. (a) Magnetic-field amplitude, |B|, and magnetic-field components in RTN coordinates. (b) PVI time series with τ = 60 s. (c) Solar-wind proton bulk speed,V. (d) Proton number density, n, and proton temperature, T. (e) Omni-directional proton differential flux, J_p, for particles with energies between 60 keV and 2 MeV in the solar-wind frame. The unit of J_p is /(cm²⋅s⋅sr⋅keV). The cyan shaded area indicates a current-sheet structure with prominent B_N reversal. The vertical dashed line denotes the time of shock passage.