@Article{SakaKogaHaya:2007:PlBuMo,
               author = "Saka, O. and Koga, Daiki and Hayashi, K.",
          affiliation = "Department of Physics, Kurume National College of Technology and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and Department 
                         of Earth and Planetary Science, University of Tokyo",
                title = "A plasma bulk motion in the midnight magnetosphere during auroral 
                         breakup inferred from all-sky image and magnetic field 
                         observations at geosynchronous altitudes",
              journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
                 year = "2007",
               volume = "69",
               number = "9",
                pages = "1063--1074",
                month = "July",
             keywords = "Auroral phenomena, Magnetosphere: inner, MHD waves and 
                         instabilities, Substorms, Magnetic pulsations: Pi2.",
             abstract = "Auroral events that occurred on January 24, 1986 in central Canada 
                         were recorded by an all-sky TV imager. During these events, 
                         auroral breakup was confined to a region between two foot points 
                         of neighboring geosynchronous satellites, GOES5 and GOES6. We 
                         examined field line signatures at satellite locations in unique 
                         station distributions and concluded that field line observation 
                         indicated plasma motion in the equatorial plane. The plasma motion 
                         showed an earthward compression combined with bifurcation 
                         (duskward or dawnward displacement in dusk/dawn sectors). In 
                         addition, we were able to infer an elliptical circulation of 
                         plasmas in the equatorial plane at Pi2 periods. Appearance in 
                         opposite rotation beside the auroral region indicated excitation 
                         of surface waves. We were able to show that auroral breakups 
                         occurred at a meridian of bifurcation. We suggest that a high 
                         plasma pressure region occurring tailward of geosynchronous 
                         altitudes may drive those plasma motions.",
           copyholder = "SID/SCD",
                 issn = "1364-6826",
             language = "en",
           targetfile = "plasma bulk.pdf",
        urlaccessdate = "17 maio 2024"
}