The physical mechanism for the emergence of ring and semi-ring plasma structures around electrolyte jets in a high-frequency discharge with liquid jet electrodes. It is shown that the electric field strength in the jet flow decay region can reach values of 10^9–10^10 V/m, at which autoelectronic emission is possible, leading to the appearance in the vicinity of the jet of primary electrons, which leads to ionization and excitation of the molecules of the surrounding gaseous medium.