@InProceedings{KuwabaraBEMYKFDHSTGLS:2007:DeICGe,
               author = "Kuwabara, Takao and Bieber, John and Evenson, Paul and Munakata, 
                         Kazuoki and Yasue, Shin-ichi and Kato, Chihiro and Fujii, Zenjiro 
                         and Duldig, Marcus and Humble, John and Silva, Marlos rockenbach 
                         da and Trivedi, Nalin Babulal and Gonzalez, Walter and Lago, 
                         Alisson Dal and Schuch, Nelson Jorge",
          affiliation = "Bartol Research Institute and Department of Physics and Astronomy, 
                         University of Delaware and Bartol Research Institute and 
                         Department of Physics and Astronomy, University of Delaware and 
                         Bartol Research Institute and Department of Physics and Astronomy, 
                         University of Delaware and Department of Physics, Shinshu 
                         University and School of General Education, Shinshu University and 
                         Department of Physics, Shinshu University and STE Laboratory, 
                         Nagoya University and {Australian Antarctic Division} and School 
                         of Mathematics and Physics, University of Tasmania and {National 
                         Institute for Space Research} and {National Institute for Space 
                         Research} and {National Institute for Space Research} and 
                         {National Institute for Space Research} and {Southern Regional 
                         Space Research Center - CRS/INPE}",
                title = "Determination of ICME Geometry and Orientation from Ground Based 
                         Observations of Galactic Cosmic Rays",
                 year = "2007",
         organization = "30. Th International Cosmic Ray Conference",
             abstract = "We have developed a method for determining ICME (Interplanetary 
                         coronal mass ejection) geometry from galactic cosmic ray data 
                         recorded by the ground-based muon detector network. The cosmic ray 
                         density depression inside the ICME, which is the cause of a 
                         Forbush decrease, is represented as an expanding cylinder based on 
                         a theoretical model of the cosmic ray particle diffusion. ICME 
                         geometry and orientation are deduced from observed time variations 
                         of density and density gradient, and are compared with that 
                         deduced from a magnetic flux rope model. From March 2001 to May 
                         2005, 11 ICME events that produced Forbush decreases >2% were 
                         observed, and clear variations of the density gradient due to ICME 
                         passage were observed in 8 of 11 events. In 3 of these 8 events, 
                         clear signatures of magnetic flux rope structure (large, smooth 
                         rotation of magnetic field) were also seen, and the ICME geometry 
                         and orientation deduced from the two methods were very similar. 
                         This suggests that the cosmic ray-based method may provide a more 
                         robust method for deducing ICME geometry than the flux rope method 
                         for events where a large Forbush decrease is observed.",
  conference-location = "Yucatan, Mexico",
      conference-year = "July 3 - 11",
             language = "en",
           targetfile = "ICRC2007_Kuwabara Determination of ICME Geometry and Orientation 
                         from Ground .. pdf.pdf",
        urlaccessdate = "05 maio 2024"
}