Authors: Phillip Hess (NRL), Robin Colaninno (NRL), Angelos Vourlidas (APL), Guillermo Stenborg (APL), Russell Howard (APL), Shaheda Shaik (GMU)

The SoloHI instrument was built to provide observations of the heliosphere just beyond the coronagraph field of view where many key processes governing CME evolution and interaction with the solar wind are believed to occur. Since the instrument door was opened to begin observing in June 2020, a number of transient structures have been observed. Many of these structures are smaller blobs propagating into the solar wind, but an increase in solar activity coinciding with the first science orbit of the mission has provided observations of a number of large CMEs, including geoeffective and SEP generating events.

We present SoloHI observations of these eruptions, as well as the earliest attempts to address open questions governing CMEs in the heliosphere with this new and exciting data set. These efforts include combining SoloHI data with the other available observations from SolO, as well as other spacecraft throughout the heliosphere. We demonstrate the degree to which these complimentary observations agree with one another, while highlighting the additional details provided by the SoloHI vantage point and also point to the presence and evolution of structural features within the CME that are not well resolved at 1 AU. Using these events, we discuss larger implications for the understanding of remote sensing observations of the CME ‘three-part structure’ as well as more general questions of CME evolution.