Energetic solar eruptions encompass a range of interconnected phenomena, including fast coronal mass ejections (CMEs), strong X-ray flares, large solar energetic particle (SEP) events, and the coronal waves and shocks associated with them. Understanding how these phenomena are related, how energy is partitioned between them, and how they contribute to the acceleration and release of energetic particles remains an open question in solar and heliospheric physics. The respective roles of flares, CMEs and CME-driven shocks in particle acceleration and release, as well as the role of magnetic connectivity, are still being investigated. The propagation of CMEs, shocks and magnetic structures through the heliosphere can also affect galactic cosmic rays (GCRs), producing Forbush decreases (FDs) that provide information on the evolution and large-scale structure of interplanetary disturbances.
The expanding fleet of heliospheric spacecraft, together with remote-sensing and ground-based observations, allows these processes to be studied over a wide range of heliocentric distances. Observations from Solar Orbiter, Parker Solar Probe, STEREO-A, BepiColombo and near-Earth spacecraft can be combined with observations of the solar corona, radio measurements and ground-based cosmic-ray data. This makes it possible to study the evolution of solar eruptions, their magnetic connections, particle acceleration and transport, and the modulation of GCRs from the Sun to interplanetary space. Projects such as SPEARHEAD and SOLER have contributed to this effort through coordinated datasets, catalogues, analysis tools and modelling approaches for energetic solar eruptions and energetic particles.
This session invites observational, theoretical and modelling studies of energetic solar eruptions and their interrelations, from the solar corona to interplanetary space. Contributions on flares, CMEs, coronal waves and shocks, SEP acceleration and release, magnetic connectivity and particle transport are welcome, as are studies of Forbush decreases and the modulation of GCRs by CMEs, ICMEs and magnetic structures. We also welcome presentations on new data products, analysis methods and tools for studying energetic solar eruptions and their heliospheric consequences.