Naslov
Modeling the evolution and propagation of the 2017 September 9th and 10th CMEs and SEPs arriving at Mars constrained by remote- sensing and in-situ measurement

Autori
Guo, Jingnan ; Dumbović, Mateja ; Wimmer-Schweingruber, Robert F. ; Temmer, Manuela ; Lohf, Henning ; Wang, Yuming ; Veronig, Astrid ; Hassler, Donald M. ; Mays, Leila M. ; Zeitlin, Cary ; Ehresmann, Bent ; Witasse, Olivier ; von Forstner, Johan L. Freiherr ; Heber, Bernd ; Holmström, Mats ; Posner, Arik

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
Solar Heliospheric and INterplanetary Environment (SHINE 2018)

Mjesto i datum
Cocoa Beach (FL), Sjedinjene Američke Države, 30.07.2018. - 03.08.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
coronal mass ejections, solar energetic particles, space weather

Sažetak
On 2017-09-10, solar energetic particles (SEPs) originating from the active region 12673 were registered as a ground level enhancement (GLE) at Earth and the biggest GLE on the surface of Mars as observed by the Radiation Assessment Detector (RAD) since the landing of the Curiosity rover in August 2012. Based on multi-point coronagraph images and the Graduated Cylindrical Shell (GCS) model, we identify the initial 3D kinematics of an extremely fast Coronal Mass Ejection (CME) and its shock front, as well as another two CMEs launched hours earlier with moderate speeds . The three CMEs interacted as they propagated outwards into the heliosphere and merged into a com- plex interplanetary CME (ICME). The arrival of the shock and ICME at Mars caused a very significant Forbush Decrease (FD) seen by RAD only a few hours later than that at Earth, which was about 0.5 AU closer to the Sun. We investigate the propagation of the three CMEs and the merged ICME together with the shock, using the Drag Based Model (DBM) and the WSA-ENLIL plus cone model constrained by the in-situ observations. The synergistic study of the ICME and SEP arrivals at Earth and Mars suggests that to better predict potentially hazardous space weather impacts at Earth and other heliospheric locations for human ex- ploration missions, it is essential to analyze 1) the CME kinematics, especially during their interactions and 2) the spatially and temporally varying heliospheric conditions, such as the evolution and propagation of the stream interaction regions.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA