Connection of the magnetosheath jet-like structures with foreshock activities

Plasma structures with enhanced dynamic pressure, density or speed are often observed in Earth’s magnetosheath. These structures, known as jets and fast plasmoids, can be registered in the magnetosheath, downstream of both the quasi-perpendicular and quasi-parallel bow shocks Using measurements by the Magnetospheric Multiscale (MMS) spacecraft, Goncharov et al., (2020) showed similarities in the plasma properties of the jets and fast plasmoids. On the other hand, they pointed out that the different magnetic fields inside the structures suggest that the formation mechanisms are not the same. Previous studies established that foreshock structures can be a source of the jets (Raptis et al., 2022). Xirogiannopoulou et al. (2024) found that the subsolar foreshock contains several types of structures with enhanced density or/and magnetic field magnitude, like plasmoids, SLAMS and mixed structures. Following these results, we use multi-spacecraft data collected by THEMIS, Cluster, Magnetospheric Multiscale Spacecraft (MMS) and OMNI missions, and present analytical multi-spacecraft statistical and case studies on the connection between the activity around the bow shock. Based on our comparative analysis, we discuss features of jet-like structures, and their relation to the different phenomena in the foreshock.