Citation:
Wrasse, C. M., Figueiredo, C. A. O. B., Barros, D., Takahashi, H., Carrasco, A. J., Vital, L. F. R., Rezende, L. C. A., Egito, F., Rosa, G. M., and Sampaio, A. H. R. (2021). Interaction between Equatorial Plasma Bubbles and a Medium-Scale Traveling Ionospheric Disturbance, observed by OI 630 nm airglow imaging at Bom Jesus de Lapa, Brazil. Earth Planet. Phys., 5(5), 397–406. http://doi.org/10.26464/epp2021045
2021, 5(5): 397-406. doi: 10.26464/epp2021045
Interaction between Equatorial Plasma Bubbles and a Medium-Scale Traveling Ionospheric Disturbance, observed by OI 630 nm airglow imaging at Bom Jesus de Lapa, Brazil
| 1. | Space Weather Division, National Institute for Space Research (INPE), São José dos Campos, Brazil |
| 2. | University of Los Andes (ULA), Mérida, Venezuela |
| 3. | State Key Laboratory of Space Weather, Beijing 100190, China |
| 4. | Federal University of Campina Grande (UFCG), Campina Grande, Brazil |
| 5. | Federal Institute for Education, Science and Technology Baiano (IF Baiano), Bom Jesus da 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 the MSTID (Medium-Scale Traveling Ionospheric Disturbance) over the Northeast region in Brazil. On the night of September 16 to 17, 2020, an EPB was observed propagating eastward, in an apparent fossil stage, until it interacted with a dark band electrified MSTID (eMSTID). After the interaction, four EPBs merged, followed by an abrupt southward development and bifurcations. Analysis of the data suggests that an eastward polarization electric field, induced by the dark band eMSTID, forced the EPB into an upward drift, growing latitudinally along the magnetic field lines and then bifurcating.
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