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@Article{SahaiBFJAOSIYHLSGPB:2009:EfObIo,
               author = "Sahai, Y. and Becker-Guedes, F{\'a}bio and Fagundes, P. R. and 
                         Jesus, R. de and Abreu, A. J. de and Otsuka, Y. and Shiokawa, K. 
                         and Igarashi, K. and Yumoto, K. and Huang, C. -S. and Lan, H. T. 
                         and Saito, A. and Guarnieri, F. L. and Pillat, V. G. and 
                         Bittencourt, J. A.",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UniVap)} 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 {Universidade do Vale do 
                         Para{\'{\i}}ba (UniVap)} and Solar-Terrestrial Environment 
                         Laboratory, Nagoya University and Solar-Terrestrial Environment 
                         Laboratory, Nagoya University. and National Institute of 
                         Information and Communications Technology, Tokyo, Japan. and Space 
                         Environment Research Center, Kyushu University, Fukuoka, Japan. 
                         and {Massachusetts Institute of Technology (MIT)} and Ho Chi Minh 
                         City Institute of Physics, Vietnamese Academy of Science and 
                         Technology and {Kyoto University} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UniVap)} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UniVap)} and {Instituto Nacional de Pesquisas 
                         Espacias}",
                title = "Effects observed in the ionospheric F region in the east Asian 
                         sector during the intense geomagnetic disturbances in the early 
                         part of November 2004",
              journal = "Journal of Geophysical Research",
                 year = "2009",
               volume = "114",
                pages = "A00A18",
                month = "11pp",
             keywords = "tempestade geomagn{\'e}tica, camada F ionosf{\'e}rica, setor 
                         asi{\'a}tico, ionospheric F region, Asian sector, geomagnetic 
                         disturbances.",
             abstract = "The Sun was very active in the early part of November 2004. During 
                         the period of 810 November 2004, intense geomagnetic disturbances 
                         with two superstorms were observed. In a companion paper 
                         (hereinafter referred to as paper 1), the effects observed in the 
                         F region during the intense geomagnetic disturbances in the early 
                         part of November 2004 in the Latin American sector were presented. 
                         In the present paper, we investigate the effects observed in the F 
                         region during the intense geomagnetic disturbances in the early 
                         part of November 2004 in the east Asian sector.We have used the 
                         ionospheric sounding observations at Ho Chi Minh City (Vietnam) 
                         and Okinawa, Yamagawa, Kokubunji, and Wakkanai (Japan) in the 
                         present investigations. Also, GPS observations in the east Asian 
                         sector (several longitude zones) have been used to study the 
                         effect in the F region during the intense geomagnetic 
                         disturbances. The ion density versus latitudinal variations 
                         obtained by the DMSP F15 satellite orbiting at about 800 km 
                         altitude in the east Asian sector and the magnetic field data 
                         obtained at several stations in the Japanese meridian are also 
                         presented. Several important features from these observations in 
                         both the sectors during this extended period of intense 
                         geomagnetic disturbances are presented. The east Asian sector 
                         showed very pronounced effects during the second superstorm, which 
                         was preceded by two storm enhancements. It should be mentioned 
                         that around the beginning of the night on 10 November, ionospheric 
                         irregularities propagating from higher midlatitude region to 
                         low-latitude region were observed in the Japanese sector. The most 
                         intense geomagnetic field H component in that sector was observed 
                         on 10 November at L = 2.8, indicating that the auroral oval and 
                         the heating got further to low latitudes and the ionospheric 
                         irregularities observed in the Japanese sector on this night are 
                         midlatitude ionospheric disturbances associated with the second 
                         superstorm. The absence of ionospheric irregularities in the 
                         Japanese sector during the 8 November superstorm suggests that the 
                         magnetosphere-ionosphere system was possibly preconditioned 
                         (primed) when the second interplanetary structure impacted the 
                         magnetosphere.",
                  doi = "10.1029/2008JA013053",
                  url = "http://dx.doi.org/10.1029/2008JA013053",
                 issn = "0148-0227 and 2156-2202",
                label = "lattes: 1588982182134967 2 SahaiBFJAOSIYHLSGPB:2009:EfObIo",
             language = "en",
           targetfile = "jgra19319.pdf",
        urlaccessdate = "24 jan. 2021"
}


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