%0 Journal Article %T Ultra low frequency emissions ranging from 0.1 to 3 Hz in circumpolar areas %A Potapov, A.S. %A Guglielmi, A.V. %A Dovbnya, B.V. %K ultra low frequency electromagnetic waves, polar caps, cusp, magnetosphere, solar wind %J Solar-Terrestrial Physics %D 2020 %N 6 %P 5 %I INFRA-M Academic Publishing LLC.