On the possibility of localisation of Pc1 waves nearby the ionosphere, taking account of heavy ions in the magnetosphere

This paper examines the possibility of localisation of short-term ULF waves in the magnetospheric regions contiguous to the upper boundary of the ionosphere (near-ionospheric regions of localisation), taking account of heavy ions in magnetospheric plasma. Using the WKB approximation, we examine whether near-ionospheric regions can excite eigenmodes similarly to excitation of ULF oscillations in the equatorial resonator. Existence of such modes is proved to be impossible, and total energy absorption is proved to take place as the wave passes from the near-ionospheric region to the region opaque to wave.