Imperial College London
Alternate

ProfessorMicheleDougherty

Faculty of Natural Sciences, Department of Physics

Head of Department of Physics, Professor of Space Physics
 
 
 
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Contact

 

+44 (0)20 7594 7770m.dougherty Website

 
 
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Assistant

 

Ms Lida Mnatsakanian +44 (0)20 7594 7503

 
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Location

 

Blackett 900aBlackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Witasse:2017:10.1002/2017JA023884,
author = {Witasse, O and Sanchez-Cano, B and Mays, ML and Kajdic, P and Opgenoorth, H and Elliott, HA and Richardson, IG and Zouganelis, I and Zender, J and Wimmer-Schweingruber, RF and Turc, L and Taylor, MGGT and Roussos, E and Rouillard, A and Richter, I and Richardson, JD and Ramstad, R and Provan, G and Posner, A and Plaut, JJ and Odstrcil, D and Nilsson, H and Niemenen, P and Milan, SE and Mandt, K and Lohf, H and Lester, M and Lebreton, J-P and Kuulkers, E and Krupp, N and Koenders, C and James, MK and Intzekara, D and Holmstrom, M and Hassler, DM and Hall, BES and Guo, J and Goldstein, R and Goetz, C and Glassmeier, KH and Genot, V and Evans, H and Espley, J and Edberg, NJT and Dougherty, M and Cowley, SWH and Burch, J and Behar, E and Barabash, S and Andrews, DJ and Altobelli, N},
doi = {10.1002/2017JA023884},
journal = {Journal of Geophysical Research: Space Physics},
pages = {7865--7890},
title = {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},
url = {http://dx.doi.org/10.1002/2017JA023884},
volume = {122},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
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, Mars Atmosphere and Volatile EvolutioN Mission (MAVEN), Mars Odyssey, and Mars Science Laboratory (MSL) missions, 44 h 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 nonambiguous signature at New Horizons. A potential detection of this ICME by Voyager 2 at 110–111 AU is also discussed. The multispacecraft 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.
AU  - Witasse,O
AU  - Sanchez-Cano,B
AU  - Mays,ML
AU  - Kajdic,P
AU  - Opgenoorth,H
AU  - Elliott,HA
AU  - Richardson,IG
AU  - Zouganelis,I
AU  - Zender,J
AU  - Wimmer-Schweingruber,RF
AU  - Turc,L
AU  - Taylor,MGGT
AU  - Roussos,E
AU  - Rouillard,A
AU  - Richter,I
AU  - Richardson,JD
AU  - Ramstad,R
AU  - Provan,G
AU  - Posner,A
AU  - Plaut,JJ
AU  - Odstrcil,D
AU  - Nilsson,H
AU  - Niemenen,P
AU  - Milan,SE
AU  - Mandt,K
AU  - Lohf,H
AU  - Lester,M
AU  - Lebreton,J-P
AU  - Kuulkers,E
AU  - Krupp,N
AU  - Koenders,C
AU  - James,MK
AU  - Intzekara,D
AU  - Holmstrom,M
AU  - Hassler,DM
AU  - Hall,BES
AU  - Guo,J
AU  - Goldstein,R
AU  - Goetz,C
AU  - Glassmeier,KH
AU  - Genot,V
AU  - Evans,H
AU  - Espley,J
AU  - Edberg,NJT
AU  - Dougherty,M
AU  - Cowley,SWH
AU  - Burch,J
AU  - Behar,E
AU  - Barabash,S
AU  - Andrews,DJ
AU  - Altobelli,N
DO  - 10.1002/2017JA023884
EP  - 7890
PY  - 2017///
SN  - 2169-9380
SP  - 7865
TI  - 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  - Journal of Geophysical Research: Space Physics
UR  - http://dx.doi.org/10.1002/2017JA023884
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000411788800002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/57483
VL  - 122
ER  -
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