Abstract. The ®rst-ever high resolution 2-D maps of OI 630.0 nm dayglow obtained from equatorial latitudes clearly reveal the movement as a large-scale feature of the equatorial ionization anomaly (EIA). These also show the presence of wave-like features classi®ed as gravity waves presumably originating at the crest of the EIA, similar to the equatorial electrojet acting as a source of these waves. These results are presented and discussed. Key words. Atmospheric composition and structure (Airglow and aurora) á Ionosphere (Equatorial ionosphere; Instruments and techniques).