Relating near-Earth observations of an interplanetary coronal mass ejection to the conditions at its site of origin in the solar corona

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Read Full Article (file size: 296691 bytes) Cited by GEOPHYSICAL RESEARCH LETTERS, VOL. 32, L13105, doi:10.1029/2005GL022842, 2005 Relating near-Earth observations of an interplanetary coronal mass ejection to the conditions at its site of origin in the solar corona A. N. Fazakerley Mullard Space Science Laboratory, University College London, Dorking, UK L. K. Harra Mullard Space Science Laboratory, University College London, Dorking, UK J. L. Culhane Mullard Space Science Laboratory, University College London, Dorking, UK L. van Driel-Gesztelyi Mullard Space Science Laboratory, University College London, Dorking, UK E. Lucek Space and Atmospheric Physics Group, Imperial College of Science, Technology, and Medicine, London, UK S. A. Matthews Mullard Space Science Laboratory, University College London, Dorking, UK C. J. Owen Mullard Space Science Laboratory, University College London, Dorking, UK C. Mazelle Centre d'Etude Spatiale des Rayonnements, Toulouse, France A. Balogh Space and Atmospheric Physics Group, Imperial College of Science, Technology, and Medicine, London, UK H. Rème Centre d'Etude Spatiale des Rayonnements, Toulouse, France Abstract A halo coronal mass ejection (CME) was detected on January 20, 2004. We use solar remote sensing data (SOHO, Culgoora) and near-Earth in situ data (Cluster) to identify the CME source event and show that it was a long duration flare in which a magnetic flux rope was ejected, carrying overlying coronal arcade material along with it. We demonstrate that signatures of both the arcade material and the flux rope material are clearly identifiable in the Cluster and ACE data, indicating that the magnetic field orientations changed little as the material traveled to the Earth, and that the methods we used to infer coronal magnetic field configurations are effective. Received 4 March 2005; accepted 25 May 2005; published 8 July 2005. Index Terms: 2111 Interplanetary Physics: Ejecta, driver gases, and magnetic clouds; 2101 Interplanetary Physics: Coronal mass ejections (7513); 2139 Interplanetary Physics: Interplanetary shocks; 2788 Magnetospheric Physics: Magnetic storms and substorms (7954); 7519 Solar Physics, Astrophysics, and Astronomy: Flares. Read Full Article (file size: 296691 bytes) Cited by Citation: Fazakerley, A. N., L. K. Harra, J. L. Culhane, L. van Driel-Gesztelyi, E. Lucek, S. A. Matthews, C. J. Owen, C. Mazelle, A. Balogh, and H. Rème (2005), Relating near-Earth observations of an interplanetary coronal mass ejection to the conditions at its site of origin in the solar corona, Geophys. Res. Lett., 32, L13105, doi:10.1029/2005GL022842. Copyright 2005 by the American Geophysical Union.

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