@InProceedings{NogueiraAbSoDeBaCoSi:2018:LaDeDe,
               author = "Nogueira, Paulo and Abdu, Mangalathayil Ali and Souza, Jonas 
                         Rodrigues de and Denardin, Clezio Marcos and Barbosa Neto, Paulo 
                         Fran{\c{c}}a and Costa, Jo{\~a}o P. Serra Souza da and Silva, 
                         Ana Paula",
          affiliation = "Instituto Federal de Educa{\c{c}}{\~a}o, Ci{\^e}ncia e 
                         Tecnologia de S{\~a}o Paulo and {Instituto Tecnologico de 
                         Aeron{\'a}utica (ITA)} 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 and Instituto Federal de 
                         Educa{\c{c}}{\~a}o, Ci{\^e}ncia e Tecnologia de S{\~a}o 
                         Paulo",
                title = "Latitude dependent delay in the responses of the equatorial 
                         electrojet and sq currents to x-class solar flares",
                 year = "2018",
         organization = "Cospar Scientific Assembly, 42.",
             abstract = "We have analyzed low latitude ionospheric current responses to two 
                         intense (X-class) solar flares that occurred on 13-May-2013 and 
                         11-March-2015. Sudden intensifications, in response to solar flare 
                         radiation impulses, in the Sqand Equatorial electrojet (EEJ) 
                         currents, as detected by magnetometers over equatorial and low 
                         latitude sites in South America are studied. In particular we show 
                         for the first time 5 to 8 minutes time delay is present in the 
                         peak effect in the EEJ, with respect that of Sq current outside 
                         the magnetic equator, in response to the flare radiation 
                         enhancement. The Sq current intensification peaks close to the 
                         flare X-ray peak, while the EEJ peak occurs 5 to 8 minutes later. 
                         We have used the Sheffield University Plasmasphere-Ionosphere 
                         Model at National Institute for Space Research (SUPIM-INPE) to 
                         simulate the E-region conductivity enhancement as caused by the 
                         flare enhanced solar EUV and soft X-rays flux. We propose that the 
                         flare induced enhancement in neutral wind occurring with a time 
                         delay (with respect to the flare radiations) could be responsible 
                         for a delayed zonal electric field disturbance driving the EEJ, in 
                         which the Cowling conductivity offers enhanced sensitivity to the 
                         driving zonal electric field.",
  conference-location = "Pasadena, California",
      conference-year = "14-22 July",
             language = "en",
           targetfile = "C1.1-0121-18_P_Nogueira.pdf",
        urlaccessdate = "19 abr. 2024"
}