Modelling a multi-spacecraft coronal mass ejection encounter with EUHFORIA

Context. Coronal mass ejections (CMEs) are a manifestation of the Sun’s eruptive nature. They can have great impact on Earth, but also human activity in space and ground. Therefore, modelling their evolution as they propagate through interplanetary is essential. Aims. EUropean Heliospheric FORecasting Information Asset (EUHFORIA) data-driven, physics-based model, tracing CMEs background solar wind conditions. It employs spheromak flux rope, which provides it with advantage reconstructing internal magnetic field configuration CMEs. This something that not included simpler cone CME model used so far for weather forecasting. work aims at assessing EUHFORIA. Methods. We employed to reconstruct well observed compare output situ observations. focus an eruption from 6 January 2013 was encountered by two radially aligned spacecraft, Venus Express STEREO-A. first analysed properties source this we extracted lifted off Sun. Using information, set up EUHFORIA runs event. Results. The predicts arrival times half full day ahead ones, within errors established similar studies. In domain, appears be propagating primarily southward, accordance white-light images close Conclusions. order get topology, aimed selecting rotation angle axis symmetry perpendicular direction polarity inversion line (PIL). modelled profiles, amplitude, times, sheath region length all affected choice radius spheromak.