@InProceedings{AbreuCRAANVFJGM:2021:SoFlEf,
               author = "Abreu, Alessandro Jos{\'e} de and Correia, Emilia and Roberto, M. 
                         and Alves, M. A. and Abalde, Jos{\'e} Ricardo and Nogueira, P. A. 
                         and Vankatesh, K. and Fagundes, P. R. and Jesus, Rodolfo de and 
                         Gende, M. and Martin, I. M.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and {Instituto 
                         Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and {Instituto 
                         Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and Instituto Federal 
                         de Educa{\c{c}}{\~a}o, Ci{\^e}ncia e Tecnologia de S{\~a}o 
                         Paulo (IFSP) and {National Atmospheric Research Laboratory (NARL)} 
                         and {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and Universidad 
                         Nacional de La Plata, La Plata and {Instituto Tecnol{\'o}gico de 
                         Aeron{\'a}utica (ITA)}",
                title = "Solar flares effects on the ionosphere monitores by the 
                         ground-base",
                 year = "2021",
         organization = "Simp{\'o}sio Brasileiro de Geof{\'{\i}}sica Espacial e 
                         Aeronomia, 8. (SBGEA)",
             abstract = "In this investigation, we present and discuss the effects of 6 
                         X2-class solar flare events in the ionospheric F region over 
                         Brazilian sector that occurred during 2013 to 2015. For this 
                         investigation, we present the vertical total electron content 
                         (VTEC) observations from nearly 120 Global Positioning System 
                         (GPS) receivers all over the Brazilian sector for each event. The 
                         stations belong to the Rede Brasileira de Monitoramento 
                         Cont´\ınuo, operated by the Instituto Brasileiro de 
                         Geografia e Estat´\ıstica(IBGE). Also, ionospheric sounding 
                         observations obtained in Sao Jos´e dos Campos (23.2\◦S, 
                         45.9\◦W), under the southern crest of the equatorial 
                         ionospheric anomaly (EIA), Brazil, are presented. The observations 
                         show that the greatest TEC impact occurs with the EUV fluxes 
                         increases lasting for more than one hour and when the solar active 
                         region is located close to the solar disc center. The largest 
                         increase of \∆TEC occurs below the magnetic equator line, 
                         covering mainly the central, northeast, southeast and south 
                         regions, which includes the equatorial ionospheric anomaly (EIA) 
                         region. The ionograms show partial or total fade out in the echoes 
                         traces observed causing blackouts of radio signals of up to 60 
                         minutes, which can have serious consequences to technological 
                         systems of public and private agencies around Brazilian sector.",
  conference-location = "Online",
      conference-year = "22-26 mar.",
             language = "en",
        urlaccessdate = "20 maio 2024"
}