Strong coronal deflection of a CME and its interplanetary evolution to Earth and Mars (CROSBI ID 626073)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Christian Möstl, Tanja Rollett, Rudy A. Frahm, Ying D. Liu, David M. Long, Robin C. Colaninno, Martin A. Reiss, Manuela Temmer, Charles J. Farrugia, Arik Posner, Mateja Dumbović, Miho Janvier, Pascal Demoulin, Peter Boakes, Andy Devos, Emil Kraaikamp, Mona L. Mays, Bojan Vršnak
engleski
Strong coronal deflection of a CME and its interplanetary evolution to Earth and Mars
We discuss multipoint imaging and in situ observations of the coronal mass ejection (CME) on January 7 2014 which resulted in a major false alarm. While the source region was almost at disk center facing Earth, the eruption was strongly deflected in the corona, and in conjunction with its particular orientation this CME missed Earth almost entirely, leading to no significant geomagnetic effects. We demonstrate this by a synthesis of data from 7 different heliospheric and planetary space missions (STEREO-A/B, SOHO, SDO, Wind, Mars Express, Mars Science Laboratory). The CMEs ecliptic part was deflected by 37+/-10 deg in heliospheric longitude, a value larger than previously thought. Multipoint in situ observations at Earth and Mars confirm the deflection, and are consistent with an elliptical interplanetary shock shape of aspect ratio 1.4+/0.4. We also discuss our new method, the Ellipse Evolution (ElEvo) model, which allows us to optimize the global shape of the CME shock with multipoint in situ observations of the interplanetary CME arrival. ElEvo, which is an extension to the Drag-Based-Model by Vrsnak et al., may also be used for real time space weather forecasting. The presented results enhance our understanding of CME deflection and shape, which are fundamental ingredients for improving space weather forecasts.
coronal mass ejection ; space weather
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Podaci o prilogu
2015.
objavljeno
Podaci o matičnoj publikaciji
Podaci o skupu
European Geosciences Union, General Assembly 2015
poster
12.04.2015-17.04.2015
Beč, Austrija