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Geometry of an interplanetary CME on October 29, 2003 deduced from cosmic rays
Physics Department, Shinshu University, Matsumoto, Japan
Physics Department, Shinshu University, Matsumoto, Japan
Physics Department, Shinshu University, Matsumoto, Japan
Physics Department, Shinshu University, Matsumoto, Japan
Physics Department, Shinshu University, Matsumoto, Japan
Physics Department, Shinshu University, Matsumoto, Japan
Bartol Research Institute, University of Delaware, Newark, Deleware, USA
Bartol Research Institute, University of Delaware, Newark, Deleware, USA
Bartol Research Institute, University of Delaware, Newark, Deleware, USA
Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
National Institute of Information and Communications Technology, Tokyo, Japan
Australian Antarctic Division, Kingston, Tasmania, Australia
School of Mathematics and Physics, University of Tasmania, Hobart, Tasmania, Australia
National Institute for Space Research (INPE/OES/CRSPE), Sao Jose dos Campos, Santa Maria, Brazil
National Institute for Space Research (INPE/OES/CRSPE), Sao Jose dos Campos, Santa Maria, Brazil
Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
National Institute for Space Research (INPE/OES/CRSPE), Sao Jose dos Campos, Santa Maria, Brazil
A coronal mass ejection (CME) associated with an X17 solar flare reached Earth on October 29, 2003, causing an ∼11% decrease in the intensity of high-energy Galactic cosmic rays recorded by muon detectors. The CME also produced a strong enhancement of the cosmic ray directional anisotropy. Based upon a simple inclined cylinder model, we use the anisotropy data to derive for the first time the three-dimensional geometry of the cosmic ray depleted region formed behind the shock in this event. We also compare the geometry derived from cosmic rays with that derived from in situ interplanetary magnetic field (IMF) observations using a Magnetic Flux Rope model.
Received 21 June 2004; accepted 24 August 2004; published 6 October 2004.
Citation: (2004), Geometry of an interplanetary CME on October 29, 2003 deduced from cosmic rays, Geophys. Res. Lett., 31, L19803, doi:10.1029/2004GL020803.
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