Speaker
Description
The Midnight Brightness Wave (MBW) is characterized by an enhancement in the intensity of terrestrial airglow emission near local midnight, particularly in the OI 630.0 nm emission, and is associated with the Midnight Temperature Maximum (MTM), which occurs mainly in equatorial and low-latitude regions. Brazil's continental extent and its broad latitudinal and longitudinal coverage provide a favorable configuration for observing this phenomenon at different locations and investigating its spatial evolution. In this study, all-sky imaging data were analyzed from four sites distributed over the Brazilian territory: São João do Cariri, PB (7.4°S; 36.5°W), Bom Jesus da Lapa, BA (13.3°S; 43.4°W), Cachoeira Paulista, SP (22.0°S; 45.0°W), and São Martinho da Serra, RS (29.5°S; 53.9°W). These observations provide an opportunity to investigate the occurrence and spatial extent of the MBW over a broad latitudinal range, from equatorial and low-latitude regions toward mid-latitudes. This work aims to characterize the MBW events observed at these sites, investigate their spatial and temporal development, including propagation speed and longitudinal variability. The combined analysis of observations from multiple sites contributes to a better understanding of the spatial distribution and propagation of the MBW.