@InProceedings{FushishitaMMKYKBESLSTDHS:2009:PrFoDe,
               author = "Fushishita, A. and Munakata, Kazuoki and Miyasaka, H and Kato, C 
                         and Yasue, S and Kuwabara, Takao and Bieber, Jonh and Evenson, P. 
                         and Silva, Marlos Rockenbach and Lago, Alisson Dal and Schuch, 
                         Nelson Jorge and Tokumaru, M. and Duldig, M. L. and Humble, J. E. 
                         and Sabbah, I.",
          affiliation = "{Shinshu University} and {Shinshu University} and {Shinshu 
                         University} and {Shinshu University} and {Shinshu University} and 
                         {University of Delaware} and {University of Delaware} and 
                         {University of Delaware} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Nagoya University} and {Australian Antarctic Division} and 
                         {University of Tasmania} and {University of Alexandria}",
                title = "Precursors of the forbush decrease on December 14, 2006 observed 
                         with the Global Muon Detector Network (GMDN)",
            booktitle = "Proceedings...",
                 year = "2009",
         organization = "International Cosmic Ray Conference, 31.",
             keywords = "Coranal Mass Ejection, Loss Cone precursor, cosmic ray 
                         anisotropy.",
             abstract = "We analyze the precursory anisotropy of a Forbush decrease 
                         observed with the multidirectional muon detector at S{\~a}o 
                         Martinho in Brazil on December 14, 2006. By subtracting 
                         contribution from the diurnal anisotropy precisely determined by 
                         the Global Muon Detector Network (GMDN), we succeed in extracting 
                         clear signatures of the precursor. The precursor first appeared 
                         ten hours prior to the onset of the Storm Sudden Commencement 
                         (SSC) as an increase of muon rate at the pitch angle of 
                         \∼60\◦ around the IMF. This increase is consistent 
                         with the measurement of galactic cosmic rays reflected and 
                         accelerated by an interplanetary shock approaching toward the 
                         Earth with a radial speed of \∼1160 km/sec. This intensity 
                         increase is observed for four hours and then followed by an 
                         intensity deficit known as a loss cone (LC) around \∼0 
                         \◦ pitch angle during the next four hours before the SSC 
                         onset. Weak signature of LC is also observed with S{\~a}o 
                         Martinho one day earlier on December 13, at the similar local time 
                         as December 14. This suggests that the LC appeared only 6.6 hours 
                         after the CME eruption on the sun, when the interplanetary shock 
                         was expected to be located 0.2 AU from the sun.",
  conference-location = "Lodz",
      conference-year = "2009",
                label = "lattes: 7623756851705734 9 FushishitaMMKYKBESLSTDHS:2009:PrFoDe",
             language = "en",
           targetfile = "fishihita_precursors.pdf",
        urlaccessdate = "18 maio 2024"
}