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Geometry of an interplanetary CME on October 29, 2003 deduced from cosmic rays


Kuwabara, T and Munakata, K and Yasue, S and Kato, C and Akahane, S and Koyama, M and Bieber, JW and Evenson, P and Pyle, R and Fujii, Z and Tokumaru, M and Kojima, M and Marubashi, K and Duldig, ML and Humble, JE and Silva, MR and Trivedi, NB and Gonzalez, WD and Schuch, NJ, Geometry of an interplanetary CME on October 29, 2003 deduced from cosmic rays, Geophysical Research Letters, 31, (19) pp. L19803. ISSN 0094-8276 (2004) [Refereed Article]

DOI: doi:10.1029/2004GL020803


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 rime 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. Copyright 2004 by the American Geophysical Union.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:High energy astrophysics and galactic cosmic rays
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Humble, JE (Dr John Humble)
ID Code:30671
Year Published:2004
Web of Science® Times Cited:38
Deposited By:Physics
Deposited On:2004-08-01
Last Modified:2011-10-06

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