Locations of relevant spacecraft monitoring the Sun on 3 October 2023 at 12:00 UT. (a) Solar-MACH plot (Gieseler et al. 2023) showing the spacecraft constellation observing the Sun on 3 October 2023. The only spacecraft that observed the in situ particles associated with the far-side CME (Solar Orbiter and PSP) are differentiated by open circles. The arrow denotes the direction pointing outwards from the flare site and the dashed spiral line represents the field line connecting to the flare. (b) Zoomed-in view close to the Sun. The coloured solid diamonds mark the magnetic footpoint of each spacecraft on the source surface before connecting to the solar surface via PFSS magnetic field extrapolations. The yellow star denotes the flare location. The colour-coding of the magnetic field lines corresponds to heliographic latitude (see colour bar on the right). Two distinct field line bundles are likely to connect to Solar Orbiter below the source surface.