00721naa#a2200205#i#450# EN\\bibl\39465 20260308064150.7 2500-0535 20200922b2020####ek#y0engy0150####ca ENG RU Ultra low frequency emissions ranging from 0.1 to 3 Hz in circumpolar areas Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2020 5 с. Journal article local Геология. Геологические и геофизические науки. 55 ENG Potapov Alexander Sergeevich Guglielmi Anatol Vladimirovich Dovbnya Boris Viktorovich zh-szf.ru