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Geometry of an interplanetary CME on October 29, 2003 deduced from cosmic rays
journal contribution
posted on 2023-05-16, 15:16 authored by Kuwabara, T, Munakata, K, Yasue, S, Kato, C, Akahane, S, Koyama, M, Bieber, JW, Evenson, P, Pyle, R, Fujii, Z, Tokumaru, M, Kojima, M, Marubashi, K, Duldig, ML, John Humble, Silva, MR, Trivedi, NB, Gonzalez, WD, Schuch, NJA 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.
History
Publication title
Geophysical Research LettersVolume
31Issue
19Pagination
L19803ISSN
0094-8276Department/School
School of Natural SciencesPublisher
American Geophysical UnionPlace of publication
Washington, USARepository Status
- Restricted