Two consecutive crossings of a highly warped HCS and associated magnetic reconnection. (a, b) Pitch-angle distribution of 433 eV suprathermal electrons and radial magnetic field component B_R observed by PSP during an interval surrounding perihelion (r ≈ 11.4 R_⊙) on September 27-28, 2023. (c) PFSS model map of the coronal magnetic field at r = 2.5 R_⊙, showing the projected PSP locations at the times of the two HCS crossings. (d) Schematic illustration of the two consecutive crossings of the warped HCS by PSP on September 27 and 28, along with associated magnetic reconnection sites.