Ionospheric effects of the Hunga Tonga volcanic eruption of 15 January 2022

During the AT-AP-RASC 2022, a special session was organized dedicated to the ionospheric effects of the exceptional January 2022 eruption of the Hunga volcano in Tonga. This spectacular event is likely of interest to a wider audience within URSI, outside of only the ionospheric research community. We therefore give here an overview of the various contributions presented during this session. Of course, this is only a brief summary, and interested readers are invited to explore the different publications listed among the references for more detailed insights.