Collisionless shocks are ubiquitous in the universe, occurring in diverse astrophysical environments, from planets to galaxy clusters. Significant efforts have been made to understand their rich dynamics and their effects on the surrounding environment, including particle thermalization and acceleration, turbulence generation, and the evolution of various transient phenomena.

Heliospheric shocks offer the unique advantage of being directly accessible by in situ measurements. Missions, such as Solar Orbiter, STEREO, and Parker Solar Probe, have deepened our knowledge of interplanetary shocks and the associated regions, while MMS, Cluster, THEMIS, Cassini, Maven, and others have similarly enhanced our knowledge of planetary bow shocks.

High-performance computing has also played a critical role in filling key knowledge gaps, enabling global and local simulations to provide insights into the nature of collisionless shocks.

Despite these efforts, many questions remain open. In particular, we still do not fully understand the mechanisms associated with certain aspects of particle heating and acceleration, wave generation, wave-particle interaction, and energy redistribution at shocks. The interplay of collisionless shocks and pre-existing plasma turbulence also remains poorly understood. Additionally, details about the formation and impact of transient structures, such as hot flow anomalies, foreshock bubbles, cavitons, spontaneous hot flow anomalies, magnetosheath jets, etc., are still unknown.

We thus welcome observational, numerical, and theoretical works that explore plasma processes at collisionless shocks and surrounding regions.