author = "Damasceno, Gabriel Campos and Correia, Em{\'{\i}}lia and Macho, 
                         Eduardo Perez",
          affiliation = "{Universidade Presbiteriana Mackenzie} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade Presbiteriana 
                title = "Multi-instrument observations of the ionospheric response to the 7 
                         September 2017 geomagnetic storm in the South American Sector",
                 year = "2018",
         organization = "Latin American Conference on Space Geophysics, 11. (COLAGE)",
             abstract = "The South American ionospheric behavior during the period from 05 
                         to 10 September 2017 is investigated using data from GNSS network 
                         from Continuous Monitoring Brazilian Network (RBMC) and ionosondes 
                         available in the Space Weather Brazilian Studying and Monitoring 
                         (Embrace) site. The geomagnetic activity was produced by the 
                         impact of two Coronal Mass Ejections (CMEs) on the Earth 
                         magnetosphere . The first one caused a geomagnetic storm that 
                         started at 19:00 UT on 07 September and reached the maximum at 
                         02:00 UT on 08 September with DST Index of -142 nT (Intense 
                         Storm), KP index 8 and Auroral index 1500 nT. During the 
                         recovering phase of this storm another CME arrived at 11:00 UT on 
                         08 September increasing the geomagnetic activity, with Dst 
                         reaching -122 nT at 15:00 UT. The Vertical Total Electron Content 
                         (VTEC) measured at different latitudes shows a distinct 
                         ionospheric response to each storm phase. During the onset main 
                         phase of the geomagnetic storm on 7 September VTEC increased at 
                         equatorial latitudes during afternoon, and after sunset shows 
                         another increase as consequence of electricfield associated with 
                         the evening Pre-reversal Enhancement (PRE). In association with 
                         the intensification of magnetic storm on 8 September, the VTEC 
                         shows an increase during sunrise and the fountain effect was 
                         intensified. The results shows that during the first hours of the 
                         main phase geomagnetic storm the ionospheric response was mainly 
                         affected by the prompt penetration electric fields (PPEFs), being 
                         a combination of PPEF and dynamo effects afterwards.",
  conference-location = "Buenos Aires, Argentina",
      conference-year = "16-20 abr.",
             language = "en",
        urlaccessdate = "27 jan. 2021"