Global IsUG index maps for tracking ionospheric variability: a case study of the 4–5 November 2023 geomagnetic stormArtem Smirnov, Eric Nana Asamoah, Víctor Navas-Portella, Elena A. Kronberg, Hermann Lühr, Qi Liu and Manuel Hernández-PajaresJ. Space Weather Space Clim., 16 (2026) 17DOI: https://doi.org/10.1051/swsc/2026008
