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. This work presents an analysis of the ionospheric responses to the solareclipse that occurred on 14 December 2020 over the Brazilian sector. Thisevent partially covers the south of Brazil, providing an excellentopportunity to study the modifications in the peculiarities that occur inthis sector, as the equatorial ionization anomaly (EIA). Therefore, we usedthe Digisonde data available in this period for two sites: Campo Grande (CG;20.47∘ S, 54.60∘ W; dip ∼23∘ S) andCachoeira Paulista (CXP; 22.70∘ S, 45.01∘ W; dip ∼35∘ S), assessing the E and F regions and Es layer behaviors.Additionally, a numerical model (MIRE, Portuguese acronym for E RegionIonospheric Model) is used to analyze the E layer dynamics modificationaround these times. The results show the F1 region disappearance and anapparent electronic density reduction in the E region during the solareclipse. We also analyzed the total electron content (TEC) maps from theGlobal Navigation Satellite System (GNSS) that indicate a weakness in theEIA. On the other hand, we observe the rise of the Es layer electrondensity, which is related to the gravity waves strengthened during solareclipse events. Finally, our results lead to a better understanding of therestructuring mechanisms in the ionosphere at low latitudes during the solareclipse events, even though they only partially reached the studied regions.

A multi-instrumental and modeling analysis of the ionospheric responses to the solar eclipse on 14 December 2020 over the Brazilian region