EGU21-2526
https://doi.org/10.5194/egusphere-egu21-2526
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Influence of the CME orientation on the ICME propagation

Karmen Martinić, Mateja Dumbović, and Bojan Vršnak
Karmen Martinić et al.
  • University of Zagreb, Faculty of Geodesy, Hvar Observatory, Zagreb, Croatia (martinickarmen@gmail.com)

Beyond certain distance the ICME propagation becomes mostly governed by the interaction of the ICME and the ambient solar wind. Configuration of the interplanetary magnetic field and features of the related ambient solar wind in the ecliptic and meridional plane are different. Therefore, one can expect that the inclination of the CME flux rope axis i.e. tilt, influences the propagation of the ICME itself. In order to study the relation between the tilt parameter and the ICME propagation we investigated isolated Earth-impacting CME-ICME evets in the time period from 2006. to 2014. We determined the CME tilt in the “near-Sun” environment from the 3D reconstruction of the CME, obtained by the Graduated Cylindrical Shell model using coronagraphic images provided by the STEREO and SOHO missions. We determined the tilt of the ICME in the “near-Earth” environment using in-situ data. We constrained our study to CME-ICME events that show no evidence of rotation while propagating, i.e. have a similar tilt in the “near-Sun” and “near-Earth” environment. We present preliminary results of our study and discuss their implications for space-weather forecasting using the drag-based(ensemble) [DB(E)M] model of heliospheric propagation.

How to cite: Martinić, K., Dumbović, M., and Vršnak, B.: Influence of the CME orientation on the ICME propagation, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-2526, https://doi.org/10.5194/egusphere-egu21-2526, 2021.

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