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@Article{JesusFCBSBAVGAS:2016:EfInGe,
               author = "Jesus, Rodolfo de and Fagundes, P. R. and Coster, A. and Bolaji, 
                         O. S. and Sobral, Jos{\'e} Humberto Andrade and Batista, Inez 
                         Staciarini and Abreu, A. J. and Venkatesh, K. and Gende, M. and 
                         Abalde, J. R. and Sumod, S. G.",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and MIT and 
                         {Univ Lagos} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Univ Nacl 
                         La Plata} and {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} 
                         and {Mahatma Gandhi University}",
                title = "Effects of the intense geomagnetic storm of September-October 2012 
                         on the equatorial, low- and mid-latitude F region in the American 
                         and African sector during the unusual 24th solar cycle",
              journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
                 year = "2016",
               volume = "138",
                pages = "93--105",
                month = "Feb.",
             keywords = "Space weather, Geomagnetic storm, Ionosphere, Ionospheric 
                         irregularities.",
             abstract = "The main purpose of this paper is to investigate the response of 
                         the ionospheric F layer in the American and African sectors during 
                         the intense geomagnetic storm which occurred on 30 September-01 
                         October 2012. In this work, we used observations from a chain of 
                         20 GPS stations in the equatorial, low- and mid latitude regions 
                         in the American and African sectors. Also, in this study 
                         ionospheric sounding data obtained during 29th September to 2nd 
                         October, 2012 at Jicamarca (JIC), Peru, Sao Luis (SL), Fortaleza 
                         (FZ), Brazil, and Port Stanley (PST), are presented. On the night 
                         of 30 September-01 October, in the main and recovery phase, the 
                         h'F variations showed an unusual uplifting of the F region at 
                         equatorial (JIC, SL and FZ) and mid- (PST) latitude stations 
                         related with the propagations of traveling ionospheric 
                         disturbances (TIDs) generated by Joule heating at auroral regions. 
                         On 30 September, the VTEC variations and foF2 observations at 
                         mid-latitude stations (American sector) showed a long-duration 
                         positive ionospheric storm (over 6 h of enhancement) associated 
                         with large-scale wind circulations and equatorward neutral winds. 
                         Also, on 01 October, a long-duration positive ionospheric storm 
                         was observed at equatorial, low and mid- latitude stations in the 
                         African sector, related with the large-scale wind circulations and 
                         equatorward neutral winds. On 01 and 02 October, positive 
                         ionospheric storms were observed at equatorial, low- and 
                         mid-latitude stations in the American sector, possibly associated 
                         with the TIDs and an equatorward neutral wind. Also, on 01 October 
                         negative ionospheric storms were observed at equatorial, low- and 
                         mid-latitude regions in the American sector, probably associated 
                         with the changes in the O/N-2 ratio. On the night of 30 
                         September-01 October, ionospheric plasma bubbles were observed at 
                         equatorial, low- and mid- latitude stations in the South American 
                         sector, possibly associated with the occurrence of geomagnetic 
                         storm.",
                  doi = "10.1016/j.jastp.2015.12.015",
                  url = "http://dx.doi.org/10.1016/j.jastp.2015.12.015",
                 issn = "1364-6826",
             language = "en",
        urlaccessdate = "04 dez. 2020"
}


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