TY JOUR TI MHD waveguide in the outer magnetosphere and mechanisms of its excitation KW the outer magnetosphere KW MHD-waveguide KW geomagnetic pulsations KW overreflection KW Kelvin–Helmholtz instability JO Solnechno-Zemnaya Fizika AU Mazur, V.A. AU Chuiko, D.A. PY 2015 IS 1 PB INFRA-M Academic Publishing LLC.