Atmospheric gravity waves can be excited by explosive volcanic eruptions and may reach Earth's upper atmosphere. In this study, we report on mesoscale concentric observed in the mesopause airglow layer following La Soufriere volcano eruption April 2021. A large ash plume spaceborne Multi-angle Imaging SpectroRadiometer instrument 10 reached ∼20 km. Temporal evolution of was provided GOES-16 Adv...