Evolution of jet-like structures in different regions of the magnetosheath

Transient enhancements in the dynamic pressure, density or speed are often observed in the Earth’s magnetosheath. They are known as jets and/or plasmoids and can be registered downstream both quasi-perpendicular and quasi-parallel bow shocks (BS). They travel from the BS through the magnetosheath and disturb the ambient plasma. Using measurements by the Magnetospheric Multiscale (MMS) spacecraft, Goncharov et al. (2020) showed similarities in the plasma properties of the jets and fast plasmoids. However, they pointed out that the different magnetic fields inside the structures suggest that the formation mechanisms are different. On the other hand, the parameters of structures registered close to the BS/magnetopause or in the sub-solar/flank magnetosheath differ. Based on our comparative analysis, we discuss features of jet-like structures, their properties, occurrence, evolution, and relation to the upstream/local parameters.