Selected snapshots of EUV and WL coronagraphic observations before and during the GLE73 event on 28 October 2021. Left panel: a running-difference image in EUV from SDO/AIA at 193 Å. The EUV wave is circled to indicate its location. The footpoints of the Parker spirals connected to STEREO-A (red), SolO (blue), and Earth (green) are shown with the coloured crosses. Most of the footpoints of the magnetic field lines connected to Earth (from PFSS) gather close to the region highlighted with a green circle. We indicate the location of ARs that the pressure (shock) wave interacted with during its expansion. The middle and right panels show running-difference images from the LASCO-C2 and STEREO-A/COR2 coronagraphs, respectively. We outline the location of the shock wave and indicate the CME. We indicate the locations where the pressure (shock) wave interacted with coronal streamers (SI) and the previous CME (P-CME).