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Read Full Article (file size: 311991 bytes) Cited by
GEOPHYSICAL RESEARCH LETTERS,
VOL. 31,
L19803,
doi:10.1029/2004GL020803,
2004
Geometry of an interplanetary CME on October 29, 2003 deduced from cosmic rays
T. Kuwabara
Physics Department, Shinshu University, Matsumoto, Japan
K. Munakata
Physics Department, Shinshu University, Matsumoto, Japan
S. Yasue
Physics Department, Shinshu University, Matsumoto, Japan
C. Kato
Physics Department, Shinshu University, Matsumoto, Japan
S. Akahane
Physics Department, Shinshu University, Matsumoto, Japan
M. Koyama
Physics Department, Shinshu University, Matsumoto, Japan
J. W. Bieber
Bartol Research Institute, University of Delaware, Newark, Deleware, USA
P. Evenson
Bartol Research Institute, University of Delaware, Newark, Deleware, USA
R. Pyle
Bartol Research Institute, University of Delaware, Newark, Deleware, USA
Z. Fujii
Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
M. Tokumaru
Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
M. Kojima
Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
K. Marubashi
National Institute of Information and Communications Technology, Tokyo, Japan
M. L. Duldig
Australian Antarctic Division, Kingston, Tasmania, Australia
J. E. Humble
School of Mathematics and Physics, University of Tasmania, Hobart, Tasmania, Australia
M. R. Silva
National Institute for Space Research (INPE/OES/CRSPE), Sao Jose dos Campos, Santa Maria, Brazil
N. B. Trivedi
National Institute for Space Research (INPE/OES/CRSPE), Sao Jose dos Campos, Santa Maria, Brazil
W. D. Gonzalez
Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
N. J. Schuch
National Institute for Space Research (INPE/OES/CRSPE), Sao Jose dos Campos, Santa Maria, Brazil
Abstract
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.
Index Terms: 2104 Interplanetary Physics: Cosmic rays; 2111 Interplanetary Physics: Ejecta, driver gases, and magnetic clouds; 2134 Interplanetary Physics: Interplanetary magnetic fields.
Read Full Article (file size: 311991 bytes) Cited by
Citation: Kuwabara, T., et al.
(2004),
Geometry of an interplanetary CME on October 29, 2003 deduced from cosmic rays,
Geophys. Res. Lett.,
31,
L19803,
doi:10.1029/2004GL020803.
Copyright 2004 by the American Geophysical Union.
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