Multipoint Observations of the June 2012 Interacting Interplanetary Flux Ropes
We report a detailed analysis of interplanetary flux ropes observed at Venus and subsequently at Earth's Lagrange L1 point between June 15 and 17, 2012. The observation points were separated by about 0.28 AU in radial distance and 5° in heliographic longitude at this time. The flux ropes were a...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2019-07-01
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| Series: | Frontiers in Astronomy and Space Sciences |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fspas.2019.00050/full |
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| author | Emilia K. J. Kilpua Simon W. Good Erika Palmerio Eleanna Asvestari Eleanna Asvestari Erkka Lumme Matti Ala-Lahti Milla M. H. Kalliokoski Diana E. Morosan Jens Pomoell Daniel J. Price Jasmina Magdalenić Stefaan Poedts Yoshifumi Futaana |
| author_facet | Emilia K. J. Kilpua Simon W. Good Erika Palmerio Eleanna Asvestari Eleanna Asvestari Erkka Lumme Matti Ala-Lahti Milla M. H. Kalliokoski Diana E. Morosan Jens Pomoell Daniel J. Price Jasmina Magdalenić Stefaan Poedts Yoshifumi Futaana |
| author_sort | Emilia K. J. Kilpua |
| collection | DOAJ |
| description | We report a detailed analysis of interplanetary flux ropes observed at Venus and subsequently at Earth's Lagrange L1 point between June 15 and 17, 2012. The observation points were separated by about 0.28 AU in radial distance and 5° in heliographic longitude at this time. The flux ropes were associated with three coronal mass ejections (CMEs) that erupted from the Sun on June 12–14, 2012 (SOL2012-06-12, SOL2012-06-13, and SOL2012-06-14). We examine the CME–CME interactions using in-situ observations from the almost radially aligned spacecraft at Venus and Earth, as well as using heliospheric modeling and imagery. The June 14 CME reached the June 13 CME near the orbit of Venus and significant interaction occurred before they both reached Earth. The shock driven by the June 14 CME propagated through the June 13 CME and the two CMEs coalesced, creating the signatures of one large, coherent flux rope at L1. We discuss the origin of the strong interplanetary magnetic fields related to this sequence of events, the complexity of interpreting solar wind observations in the case of multiple interacting CMEs, and the coherence of the flux ropes at different observation points. |
| first_indexed | 2024-12-22T03:55:04Z |
| format | Article |
| id | doaj.art-0b46fd416f7a4410ad11820187bb5a2f |
| institution | Directory Open Access Journal |
| issn | 2296-987X |
| language | English |
| last_indexed | 2024-12-22T03:55:04Z |
| publishDate | 2019-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Astronomy and Space Sciences |
| spelling | doaj.art-0b46fd416f7a4410ad11820187bb5a2f2022-12-21T18:39:53ZengFrontiers Media S.A.Frontiers in Astronomy and Space Sciences2296-987X2019-07-01610.3389/fspas.2019.00050452238Multipoint Observations of the June 2012 Interacting Interplanetary Flux RopesEmilia K. J. Kilpua0Simon W. Good1Erika Palmerio2Eleanna Asvestari3Eleanna Asvestari4Erkka Lumme5Matti Ala-Lahti6Milla M. H. Kalliokoski7Diana E. Morosan8Jens Pomoell9Daniel J. Price10Jasmina Magdalenić11Stefaan Poedts12Yoshifumi Futaana13Department of Physics, University of Helsinki, Helsinki, FinlandDepartment of Physics, University of Helsinki, Helsinki, FinlandDepartment of Physics, University of Helsinki, Helsinki, FinlandDepartment of Physics, University of Helsinki, Helsinki, FinlandInstitute of Physics, University of Graz, Graz, AustriaDepartment of Physics, University of Helsinki, Helsinki, FinlandDepartment of Physics, University of Helsinki, Helsinki, FinlandDepartment of Physics, University of Helsinki, Helsinki, FinlandDepartment of Physics, University of Helsinki, Helsinki, FinlandDepartment of Physics, University of Helsinki, Helsinki, FinlandDepartment of Physics, University of Helsinki, Helsinki, FinlandSolar–Terrestrial Centre of Excellence—SIDC, Royal Observatory of Belgium, Brussels, BelgiumCentre for Mathematical Plasma Astrophysics (CmPA), KU Leuven, Leuven, BelgiumSwedish Institute of Space Physics, Kiruna, SwedenWe report a detailed analysis of interplanetary flux ropes observed at Venus and subsequently at Earth's Lagrange L1 point between June 15 and 17, 2012. The observation points were separated by about 0.28 AU in radial distance and 5° in heliographic longitude at this time. The flux ropes were associated with three coronal mass ejections (CMEs) that erupted from the Sun on June 12–14, 2012 (SOL2012-06-12, SOL2012-06-13, and SOL2012-06-14). We examine the CME–CME interactions using in-situ observations from the almost radially aligned spacecraft at Venus and Earth, as well as using heliospheric modeling and imagery. The June 14 CME reached the June 13 CME near the orbit of Venus and significant interaction occurred before they both reached Earth. The shock driven by the June 14 CME propagated through the June 13 CME and the two CMEs coalesced, creating the signatures of one large, coherent flux rope at L1. We discuss the origin of the strong interplanetary magnetic fields related to this sequence of events, the complexity of interpreting solar wind observations in the case of multiple interacting CMEs, and the coherence of the flux ropes at different observation points.https://www.frontiersin.org/article/10.3389/fspas.2019.00050/fullsuncoronal mass ejectionheliosphereflux ropespace weather |
| spellingShingle | Emilia K. J. Kilpua Simon W. Good Erika Palmerio Eleanna Asvestari Eleanna Asvestari Erkka Lumme Matti Ala-Lahti Milla M. H. Kalliokoski Diana E. Morosan Jens Pomoell Daniel J. Price Jasmina Magdalenić Stefaan Poedts Yoshifumi Futaana Multipoint Observations of the June 2012 Interacting Interplanetary Flux Ropes Frontiers in Astronomy and Space Sciences sun coronal mass ejection heliosphere flux rope space weather |
| title | Multipoint Observations of the June 2012 Interacting Interplanetary Flux Ropes |
| title_full | Multipoint Observations of the June 2012 Interacting Interplanetary Flux Ropes |
| title_fullStr | Multipoint Observations of the June 2012 Interacting Interplanetary Flux Ropes |
| title_full_unstemmed | Multipoint Observations of the June 2012 Interacting Interplanetary Flux Ropes |
| title_short | Multipoint Observations of the June 2012 Interacting Interplanetary Flux Ropes |
| title_sort | multipoint observations of the june 2012 interacting interplanetary flux ropes |
| topic | sun coronal mass ejection heliosphere flux rope space weather |
| url | https://www.frontiersin.org/article/10.3389/fspas.2019.00050/full |
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