ИСТИНА

We study the topology of high latitude plasma domains and reanalyze the problem of the auroral oval mapping without using magnetic field models. The location of the trapping boundary of energetic particles inside the auroral oval is demonstrated. We compare the distribution of plasma pressure at low altitudes using data of DMSP observations and plasma pressure at the equatorial plane using data of THEMIS mission. It is shown that most part of the auroral oval is mapped to the surrounding the Earth plasma ring at geocentric distances smaller than 10-12Re in contrast to the ordinary suggestion of the auroral oval mapping to the plasma sheet proper. Transverse currents in the ring are the high latitude continuation of the traditional ring current. We show that obtained results can help in the creation of the non contradictory explanation of many magnetospheric phenomena including the formation of quite auroral arc in the conditions of the high level of plasma sheet turbulence. The main reasons leading to the real changes of the well established positions are discussed.