Rights statement: Accepted for publication in Journal of Geophysical Research (Space Physics). Copyright 2017. American Geophysical Union. Further reproduction or electronic distribution is not permitted.
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Rights statement: ©2017. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Interplanetary coronal mass ejection observed at STEREO-A, Mars, comet 67P/Churyumov-Gerasimenko, Saturn, and New Horizons en-route to Pluto. Comparison of its Forbush decreases at 1.4, 3.1 and 9.9 AU
T2 - Interplanetary coronal mass ejection
AU - Witasse, Olivier
AU - Sánchez-Cano, Beatriz
AU - Mays, M. L.
AU - Kajdič, P.
AU - Opgenoorth, Hermann
AU - Elliott, H. A.
AU - Richardson, I. G.
AU - Zouganelis, I.
AU - Zender, J.
AU - Wimmer-Schweingruber, R. F.
AU - Turc, L.
AU - Taylor, M. G. G. T.
AU - Roussos, E.
AU - Rouillard, A.
AU - Richter, I.
AU - Richardson, J. D.
AU - Ramstad, R.
AU - Provan, G.
AU - Posner, A.
AU - Plaut, J. J.
AU - Odstrcil, D.
AU - Nilsson, H.
AU - Niemenen, P.
AU - Milan, S. E.
AU - Mandt, K.
AU - Lohf, H.
AU - Lester, Mark
AU - Lebreton, J.-P.
AU - Kuulkers, E.
AU - Krupp, N.
AU - Koenders, C.
AU - James, M. K.
AU - Intzekara, D.
AU - Holmstrom, Mats
AU - Hassler, D. M.
AU - Hall, B. E. S.
AU - Guo, J.
AU - Goldstein, R.
AU - Goetz, C.
AU - Glassmeier, K. H.
AU - Génot, V.
AU - Evans, H.
AU - Espley, J.
AU - Edberg, Niklas
AU - Dougherty, M.
AU - Cowley, S. W. H.
AU - Burch, J.
AU - Behar, E.
AU - Barabash, Stas
AU - Andrews, David
AU - Altobelli, N.
N1 - ©2017. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
PY - 2017/8
Y1 - 2017/8
N2 - We discuss observations of the journey throughout the Solar System of a large interplanetary coronal mass ejection (ICME) that was ejected at the Sun on 14 October 2014. The ICME hit Mars on 17 October, as observed by the Mars Express, MAVEN, Mars Odyssey and MSL missions, 44 hours before the encounter of the planet with the Siding-Spring comet, for which the space weather context is provided. It reached comet 67P/Churyumov-Gerasimenko, which was perfectly aligned with the Sun and Mars at 3.1 AU, as observed by Rosetta on 22 October. The ICME was also detected by STEREO-A on 16 October at 1 AU, and by Cassini in the solar wind around Saturn on the 12 November at 9.9 AU. Fortuitously, the New Horizons spacecraft was also aligned with the direction of the ICME at 31.6 AU. We investigate whether this ICME has a non-ambiguous signature at New Horizons. A potential detection of this ICME by Voyager-2 at 110-111 AU is also discussed. The multi-spacecraft observations allow the derivation of certain properties of the ICME, such as its large angular extension of at least 116°, its speed as a function of distance, and its magnetic field structure at four locations from 1 to 10 AU. Observations of the speed data allow two different solar wind propagation models to be validated. Finally, we compare the Forbush decreases (transient decreases followed by gradual recoveries in the galactic cosmic ray intensity) due to the passage of this ICME at Mars, comet 67P and Saturn.
AB - We discuss observations of the journey throughout the Solar System of a large interplanetary coronal mass ejection (ICME) that was ejected at the Sun on 14 October 2014. The ICME hit Mars on 17 October, as observed by the Mars Express, MAVEN, Mars Odyssey and MSL missions, 44 hours before the encounter of the planet with the Siding-Spring comet, for which the space weather context is provided. It reached comet 67P/Churyumov-Gerasimenko, which was perfectly aligned with the Sun and Mars at 3.1 AU, as observed by Rosetta on 22 October. The ICME was also detected by STEREO-A on 16 October at 1 AU, and by Cassini in the solar wind around Saturn on the 12 November at 9.9 AU. Fortuitously, the New Horizons spacecraft was also aligned with the direction of the ICME at 31.6 AU. We investigate whether this ICME has a non-ambiguous signature at New Horizons. A potential detection of this ICME by Voyager-2 at 110-111 AU is also discussed. The multi-spacecraft observations allow the derivation of certain properties of the ICME, such as its large angular extension of at least 116°, its speed as a function of distance, and its magnetic field structure at four locations from 1 to 10 AU. Observations of the speed data allow two different solar wind propagation models to be validated. Finally, we compare the Forbush decreases (transient decreases followed by gradual recoveries in the galactic cosmic ray intensity) due to the passage of this ICME at Mars, comet 67P and Saturn.
KW - Interplanetary Coronal Mass Ejection
KW - Forbush decrease
KW - Mars
KW - comet 67P
KW - Saturn
KW - New Horizons
U2 - 10.1002/2017JA023884
DO - 10.1002/2017JA023884
M3 - Journal article
VL - 122
SP - 7865
EP - 7890
JO - Journal of Geophysical Research: Space Physics
JF - Journal of Geophysical Research: Space Physics
SN - 2169-9380
IS - 8
ER -