Аннотация:In the present study, the influence of the solar wind dynamic pressure on the plasma and magneticpressures of the magnetosphere is studied. We use 11‐year Time History of Events and Macroscale Interactionsduring Substorms (THEMIS) instruments for plasma and magnetic field measurements in the magnetosphereand the OMNI database for solar wind dynamic pressure and IMF data. We focus on the effects of the solar wind dynamic pressure (PSW) and consider only times in which the interplanetary magnetic field (IMF) componentsare within ±5 nT. We find that the plasma pressure inside the magnetosphere follows the solar wind dynamicpressure and that an increase in PSW also influence the day‐night pressure asymmetry. Our analysis also revealsthe existence of ion and electron drifts from midnight toward the dusk and dawn sectors, respectively. Weobserve a local magnetic pressure minimum located near a plasma pressure maximum at around 11 RE on thenightside. Comparing the effect of PSW on both plasma and magnetic pressures, we observe trends which areconsistent with the diamagnetic properties of plasmas. In general, the distribution of plasma pressure within theEarth's magnetosphere is an important criterion for evaluating the magnetostatic equilibrium and electric currentsystem. The outcome of this study should provide additional methodologies for the characterization of keyplasma characteristics within the magnetosphere.
