Electromagnetic waves permeate all regions of the planetary environments throughout the heliosphere, representing a unique mechanism of energy transfer in the nearly collisionless plasmas present. At Earth they play a fundamental role in the dynamics of the Van Allen radiation belts and ring current, being responsible for the particle acceleration, transport and loss. Planetary magnetospheres are highly variable systems, whose reactions to specific solar wind driving conditions can lead to important phenomena such as substorms. Considering that magnetospheric processes are ultimately driven by the solar wind, the ability to accurately forecast the trapped particle populations and magnetospheric dynamics is further dependent on understanding the coupling with external regions (e.g. solar wind, foreshock, magnetosheath).

The aim of this session is to discuss the generation and propagation of electromagnetic emissions in various frequency ranges (ULF, ELF, VLF), wave-particle interactions taking place, and the role of substorms in the dynamics of energetic particles trapped in the magnetospheres throughout the solar system. Theoretical and model contributions, as well as observational studies using data from recent satellite missions (Cluster, MMS, THEMIS, Van Allen Probes, ERG-Arase, etc.) and ground-based instruments at Earth as well as other planetary environments are encouraged.