ИСТИНА

Magnetosheath plasma jets are defined as dense and fast streams of the magnetosheath plasma whose energy density is higher than that of the upstream solar wind. The jets can be generated either in interaction of interplanetary discontinuities with the bow shock or due to not fully developed turbulence in the magnetosheath, in particular under quasi-radial IMF conditions. THEMIS multi-point observations of the plasma and magnetic field, conducted simultaneously in the dayside magnetosheath and magnetosphere, allow studying the jets and jet-related penetration of the magnetosheath plasma inside the low-latitude dayside magnetosphere. It was found that interaction of jets with the magnetosphere results in the magnetopause rippling that produced geomagnetic pulsations of a specific pattern. We also found that in more than 50% of cases of jets interaction with the magnetopause, the magnetosheath plasma penetrated inside the magnetosphere. Therefore, the jets provide magnetic pulsations and plasma transport from the solar wind to the dayside magnetosphere and, thus, they can be considered as an important part of the solar wind – magnetosphere coupling.