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Nature Research, Nature Communications, 1(6), 2015

DOI: 10.1038/ncomms8135

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Strong coronal channelling and interplanetary evolution of a solar storm up to Earth and Mars

Journal article published in 2015 by Christian Möstl, Tanja Rollett, Rudy A. Frahm, Ying D. Liu ORCID, David M. Long ORCID, Robin C. Colaninno, Martin A. Reiss, Manuela Temmer, Charles J. Farrugia, Arik Posner ORCID, Mateja Dumbovica, Mateja Dumbović, Miho Janvier, Pascal Demoulin, Pascal Démoulin and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractThe severe geomagnetic effects of solar storms or coronal mass ejections (CMEs) are to a large degree determined by their propagation direction with respect to Earth. There is a lack of understanding of the processes that determine their non-radial propagation. Here we present a synthesis of data from seven different space missions of a fast CME, which originated in an active region near the disk centre and, hence, a significant geomagnetic impact was forecasted. However, the CME is demonstrated to be channelled during eruption into a direction +37±10° (longitude) away from its source region, leading only to minimal geomagnetic effects. In situ observations near Earth and Mars confirm the channelled CME motion, and are consistent with an ellipse shape of the CME-driven shock provided by the new Ellipse Evolution model, presented here. The results enhance our understanding of CME propagation and shape, which can help to improve space weather forecasts.