@Article{JesusSFABGBAP:2013:ReEqLo,
               author = "Jesus, R. De and Sahai, Y. and Fagundes, P. R. and Abreu, A. J. De 
                         and Brunini, C. and Gende, M. and Bittencourt, Jos{\'e} Augusto 
                         and Abalde, J. R. and Pillat, V. G.",
          affiliation = "Universidade Do Vale Do Paraiba/IP and D, Urbanova, S{\~a}o 
                         Jos{\'e} dos Campos, SP, Brazil and Universidade Do Vale Do 
                         Paraiba/IP and D, Urbanova, S{\~a}o Jos{\'e} dos Campos, SP, 
                         Brazil and Universidade Do Vale Do Paraiba/IP and D, Urbanova, 
                         S{\~a}o Jos{\'e} dos Campos, SP, Brazil and Universidade Do Vale 
                         Do Paraiba/IP and D, Urbanova, S{\~a}o Jos{\'e} dos Campos, SP, 
                         Brazil and Facultad de Ciencias Astron{\'o}micas y 
                         Geof{\'{\i}}sicas, Universidad Nacional de la Plata, La Plata, 
                         Argentina and Facultad de Ciencias Astron{\'o}micas y 
                         Geof{\'{\i}}sicas, Universidad Nacional de la Plata, La Plata, 
                         Argentina and {Instituto Nacional de Pesquisas Espaciais (INPE)} 
                         and Universidade Do Vale Do Paraiba/IP and D, Urbanova, S{\~a}o 
                         Jos{\'e} dos Campos, SP, Brazil and Universidade Do Vale Do 
                         Paraiba/IP and D, Urbanova, S{\~a}o Jos{\'e} dos Campos, SP, 
                         Brazil",
                title = "Response of equatorial, low- and mid-latitude F-region in the 
                         American sector during the intense geomagnetic storm on 24-25 
                         October 2011",
              journal = "Advances in Space Research",
                 year = "2013",
               volume = "52",
               number = "1",
                pages = "147--157",
             keywords = "space weather, geomagnetic storm, ionosphere, ionospheric 
                         irregularities.",
             abstract = "In this paper, we present and discuss the response of the 
                         ionospheric F-region in the American sector during the intense 
                         geomagnetic storm which occurred on 24-25 October 2011. In this 
                         investigation ionospheric sounding data obtained of 23, 24, 25, 
                         and 26 October 2011 at Puerto Rico (United States), Jicamarca 
                         (Peru), Palmas, S{\~a}o Jos{\'e} dos Campos (Brazil), and Port 
                         Stanley, are presented. Also, the GPS observations obtained at 12 
                         stations in the equatorial, low-, mid- and high-mid-latitude 
                         regions in the American sector are presented. During the fast 
                         decrease of Dst (about <54 nT/h between 23:00 and 01:00 UT) on the 
                         night of 24-25 October (main phase), there is a prompt penetration 
                         of electric field of magnetospheric origin resulting an unusual 
                         uplifting of the F region at equatorial stations. On the night of 
                         24-25 October 2011 (recovery phase) equatorial, low- and 
                         mid-latitude stations show h2F variations much larger than the 
                         average variations possibly associated with traveling ionospheric 
                         disturbances (TIDs) caused by Joule heating at high latitudes. The 
                         foF2 variations at mid-latitude stations and the GPS-VTEC 
                         observations at mid- and low-latitude stations show a positive 
                         ionospheric storm on the night of 24-25 October, possibly due to 
                         changes in the large-scale wind circulation. The foF2 observations 
                         at mid-latitude station and the GPS-VTEC observations at mid- and 
                         high-mid-latitude stations show a negative ionospheric storm on 
                         the night of 24-25 October, probably associated with an increase 
                         in the density of molecular nitrogen. During the daytime on 25 
                         October, the variations in foF2 at mid-latitude stations show 
                         large negative ionospheric storm, possibly due to changes in the 
                         O/N2 ratio. On the night of 24-25, ionospheric plasma bubbles 
                         (equatorial irregularities that extended to the low- and 
                         mid-latitude regions) are observed at equatorial, low- and 
                         mid-latitude stations. Also, on the night of 25-26, ionospheric 
                         plasma bubbles are observed at equatorial and low-latitude 
                         regions.",
                  doi = "10.1016/j.asr.2013.03.017",
                  url = "http://dx.doi.org/10.1016/j.asr.2013.03.017",
                 issn = "0273-1177",
                label = "scopus",
             language = "en",
           targetfile = "1-s2.0-S0273117713001701-main.pdf",
                  url = "http://dx.doi.org/10.1016/j.asr.2013.03.017",
        urlaccessdate = "01 maio 2024"
}