TY JOUR TI On the group velocity of whistling atmospherics KW electromagnetic waves KW moving plasma KW Earth’s magnetosphere KW dispersion KW propagation path KW Green’s function KW dynamic spectrum JO Solar-Terrestrial Physics AU Guglielmi, A.V. AU Klain, B.I. AU Potapov, A.S. PY 2021 IS 7 PB INFRA-M Academic Publishing LLC.