Thursday

Coronal mass ejections (CMEs) tend to drive the strongest space weather events at Earth and through the rest of the heliosphere. Understanding the effect that a CME may have requires understanding the CME properties upon impact. The severity of a storm depends on the speed of a CME, and the strength and orientation of its magnetic field, which can be very sensitive to the position and orientation of a CME. I will review modelling of the propagation of CMEs through the corona and inner heliosphere. This includes simulating the radial propagation of a CME as it rapidly accelerates through the corona and gradually approaches the solar wind speed in the inner heliosphere, which affects both the CME arrival time and its velocity upon impact. I will also describe the deflection and rotation of CMEs in the corona, as well as interactions with structures in interplanetary space, such as other CMEs or high speed streams. Understanding these nonradial motions is critical to accurately relating near-Earth CMEs to their coronal counterparts.