TY JOUR TI Features of propagation of compressional long-period oscillations penetrating from the interplanetary medium in the magnetosphere—ionosphere system KW geomagnetic Pi3 pulsations KW equivalent current vortices KW azimuthal and meridional propagation KW penetration of ULF waves from the interplanetary medium into the magnetosphere KW field line resonance JO Solnechno-Zemnaya Fizika AU Moiseev, A.V. AU Popov, V.I. AU Mishin, V.V. AU Penskikh, Y.V. PY 2025 IS 11 PB Institute of Solar-Terrestrial Physics SB RAS