@Article{JesusSGFABNHLP:2012:IoReEq,
               author = "Jesus, R. and Sahai, Y. and Guarnieri, F. L. and Fagundes, P. R. 
                         and Abreu, A. J. and Bittencourt, J. A. and Nagatsuma, T. and 
                         Huang, C. -S. and Lan, H. T. and Pillat, V. G.",
          affiliation = "Universidade do Vale do Paraiba (UNIVAP)/IP and D, Avenida 
                         Shishima Hifumi, 2911, Urbanova, 12244-000 S{\~a}o Jos{\'e} dos 
                         Campos, SP, Brazil and Universidade do Vale do Paraiba (UNIVAP)/IP 
                         and D, Avenida Shishima Hifumi, 2911, Urbanova, 12244-000 S{\~a}o 
                         Jos{\'e} dos Campos, SP, Brazil and {} and Universidade do Vale 
                         do Paraiba (UNIVAP)/IP and D, Avenida Shishima Hifumi, 2911, 
                         Urbanova, 12244-000 S{\~a}o Jos{\'e} dos Campos, SP, Brazil and 
                         Universidade do Vale do Paraiba (UNIVAP)/IP and D, Avenida 
                         Shishima Hifumi, 2911, Urbanova, 12244-000 S{\~a}o Jos{\'e} dos 
                         Campos, SP, Brazil and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and National Institute of Information and Communications 
                         Technology (NICT), Koganei, Japan and Institute of Scientific 
                         Research, Boston College, Chestnut Hill, MA, USA and Ho Chi Minh 
                         City Institute of Physics, Vietnamese Academy of Science and 
                         Technology, Ho Chi Minh City, Viet Nam and Universidade do Vale do 
                         Paraiba (UNIVAP)/IP and D, Avenida Shishima Hifumi, 2911, 
                         Urbanova, 12244-000 S{\~a}o Jos{\'e} dos Campos, SP, Brazil",
                title = "Ionospheric response of equatorial and low latitude F-region 
                         during the intense geomagnetic storm on 24-25 August 2005",
              journal = "Advances in Space Research",
                 year = "2012",
               volume = "49",
               number = "3",
                pages = "518--529",
                month = "Feb.",
             keywords = "Atmospheric electricity, Electric fields, Geomagnetism, Holmium, 
                         Joule heating, Magnetosphere.",
             abstract = "n this investigation, we present and discuss the response of the 
                         ionospheric F-region in the South American and East Asian sectors 
                         during an intense geomagnetic storm in August 2005. The 
                         geomagnetic storm studied reached a minimum Dst of -216 nT at 
                         12:00 UT on 24 August. In this work ionospheric sounding data 
                         obtained of 24, 25, and 26 August 2005 at Palmas (PAL; 10.2¡Æ S, 
                         48.2¡Æ W; dip latitude 6.6¡Æ S), Sao Jose¢¥ dos Campos (SJC, 
                         23.2¡Æ S, 45.9¡Æ W; dip latitude 17.6¡Æ S), Brazil, Ho Chi Minh 
                         City, (HCM; 10.5¡Æ N, 106.3¡Æ E; dip latitude 2.9¡Æ N), Vietnam, 
                         Okinawa (OKI; 26.3¡Æ N, 127.8¡Æ E; dip latitude 21.2¡Æ N), Japan, 
                         are presented. Also, the GPS observations obtained at different 
                         stations in the equatorial and low-latitude regions in the 
                         Brazilian sector are presented. On the night of 24-25 August 2005, 
                         the h¡{\C{C}}F variations show traveling ionospheric disturbances 
                         associated with Joule heating in the auroral zone from SJC to PAL. 
                         The foF2 variations show a positive storm phase on the night of 
                         24-25 August at PAL and SJC during the recovery phase. Also, the 
                         GPS-VTEC observations at several stations in the Brazilian sector 
                         show a fairly similar positive storm phase on 24 August. During 
                         the fast decrease of Dst (between 10:00 and 11:00 UT) on 24 
                         August, there is a prompt penetration of electric field of 
                         magnetospheric origin that result in abrupt increase (¡­12:00 UT) 
                         in foF2 at PAL, SJC (Brazil) and OKI (Japan) and in VTEC at IMPZ, 
                         BOMJ, PARA and SMAR (Brazil). OKI showed strong oscillations of 
                         the F-region on the night 24 August resulted to the propagation of 
                         traveling atmospheric disturbances (TADs) by Joule heating in the 
                         auroral region. These effects result a strong positive observed at 
                         OKI station. During the daytime on 25 August, in the recovery 
                         phase, the foF2 observations showed positive ionospheric storm at 
                         HCM station. Some differences in the latitudinal response of the 
                         F-region is also observed in the South American and East Asian 
                         sectors.",
                  doi = "10.1016/j.asr.2011.10.020",
                  url = "http://dx.doi.org/10.1016/j.asr.2011.10.020",
                 issn = "0273-1177",
             language = "en",
        urlaccessdate = "01 maio 2024"
}