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Relating near-Earth observations of an interplanetary coronal mass ejection to the conditions at its site of origin in the solar corona
Mullard Space Science Laboratory, University College London, Dorking, UK
Mullard Space Science Laboratory, University College London, Dorking, UK
Mullard Space Science Laboratory, University College London, Dorking, UK
Mullard Space Science Laboratory, University College London, Dorking, UK
Space and Atmospheric Physics Group, Imperial College of Science, Technology, and Medicine, London, UK
Mullard Space Science Laboratory, University College London, Dorking, UK
Mullard Space Science Laboratory, University College London, Dorking, UK
Centre d'Etude Spatiale des Rayonnements, Toulouse, France
Space and Atmospheric Physics Group, Imperial College of Science, Technology, and Medicine, London, UK
Centre d'Etude Spatiale des Rayonnements, Toulouse, France
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.
Citation: (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.
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