Equatorial Plasma Bubbles and Medium-Scale Traveling Ionospheric Disturbance Interaction Observed by OI 630 nm airglow imaging at Bom Jesus de Lapa, Brazil

OI 630.0 nm airglow observations, from a new observatory at Bom Jesus de Lapa, were used to study the interaction between EPBs (Equatorial Plasma Bubbles) and MSTID (Medium-Scale Traveling Ionospheric Disturbance) over Northeast region in Brazil. On night of September 16 17, 2020, an EPB was observed propagating eastward, apparent fossil stage, until it interacted with dark band electrified (eMSTID). After interaction, four merged, followed by abrupt southward development bifurcations. Analysis data suggests that eastward polarization electric field, induced eMSTID, forced into upward drift, growing latitudinally along magnetic field lines then bifurcating.