kael 24 May 2023 in Public sid astro radio wikipedia:en=Solar_flare wikipedia:fr=Perturbation_ionosphérique_à_début_brusque wikipedia:en=Sudden_ionospheric_disturbance wikipedia:en=Skywave wikipedia:fr=Propagation_ionosphérique
kael 24 May 2023 in Public sid astro radio wikipedia:en=Solar_flare wikipedia:fr=Perturbation_ionosphérique_à_début_brusque wikipedia:en=Sudden_ionospheric_disturbance wikipedia:en=Skywave wikipedia:fr=Propagation_ionosphérique
