1 Introduction In the inner magnetosphere, the plasma pressure plays a key role in understanding the main magnetospheric dynamic processes. The knowledge about distributions of the plasma pressure under different geomagnetic conditions is necessary for explaining how the Earth's magnetosphere reaches the magnetostatic equilibrium (the plasma pressure gradient is compensated by Ampere's force) and what specific conditions are necessary to maintain it (Antonova, 2004; Stepanova et al., 2019).
