@Article{ChenRDCSMMNSJCPS:2023:14De20,
               author = "Chen, Sony Su and Resende, Laysa Cristina Ara{\'u}jo and 
                         Denardini, Clezio Marcos and Chagas, Ronan Arraes Jardim and 
                         Silva, Ligia Alves da and Marchezi, Jos{\'e} Paulo and Moro, 
                         Juliano and Nogueira, P. A. B. and Santos, Angela Machado dos and 
                         Jauer, Paulo Ricardo and Carmo, Carolina de Sousa do and 
                         Pican{\c{c}}o, Giorgio Arlan da Silva and Silva, R{\'e}gia 
                         Pereira da",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and Instituto 
                         Federal de Educa{\c{c}}{\~a}o, Ci{\^e}ncia e Tecnologia de 
                         S{\~a}o Paulo (IFSP) and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "The 14 December 2020 total solar eclipse effects on geomagnetic 
                         field variations and plasma density over South America",
              journal = "Journal of Geophysical Research: Space Physics",
                 year = "2023",
               volume = "128",
               number = "2",
                pages = "e2022JA030775",
                month = "Feb.",
             keywords = "Equatorial Electrojet (EEJ), Equatorial Ionization Anomaly (EIA), 
                         geomagnetic field variation, ground-based geomagnetic data, solar 
                         eclipse, Total Electron Content (TEC).",
             abstract = "We discuss the effects in the geomagnetic field variations and 
                         ionospheric plasma density modifications caused by the Total Solar 
                         Eclipse that occurred on 14 December 2020 over the South American 
                         sector. We used ground-based magnetometer data and the Total 
                         Electron Content maps derived from the Global Navigation Satellite 
                         System to evaluate these changes. The results show that the 
                         geomagnetic field daily variation weakens between the first and 
                         last solar eclipse penumbra contact. Additionally, we observed a 
                         significant reduction of about 52.33 nT on the Equatorial 
                         Electrojet strength at Jicamarca (11.95°S, 76.88°W), where the 
                         solar obscuration reached 16.67% approximately. This behavior 
                         indicates that the solar eclipse in the equatorial region has 
                         possibly affected electric conductivities, altering the E region 
                         dynamo electric field. Consequently, it weakens the equatorial 
                         plasma fountain, affecting the Equatorial Ionization Anomaly 
                         development. Additionally, the ionospheric dynamics variations 
                         over Jicamarca during the solar eclipse event are analyzed using 
                         ionosonde data. We observe that the solar eclipse also caused a 
                         modification in the sporadic E layer and F region dynamics, 
                         indicating possible evidence of the gravity wave occurrence. 
                         Therefore, the results found here provide a better understanding 
                         of how the solar eclipse passage in the equatorial region affects 
                         the electron density in the low-latitude regions.",
                  doi = "10.1029/2022JA030775",
                  url = "http://dx.doi.org/10.1029/2022JA030775",
                 issn = "2169-9402",
                label = "self-archiving-INPE-MCTIC-GOV-BR",
             language = "en",
           targetfile = "JGR Space Physics - 2023 - Chen - The 14 December 2020 Total Solar 
                         Eclipse Effects on Geomagnetic Field Variations and.pdf",
        urlaccessdate = "01 maio 2024"
}