00671naa#a2200181#i#450# EN\\bibl\48924 20260311024210.3 2500-0535 20220930b2022####ek#y0engy0150####ca ENG RU Structure of groups of eigenfrequencies in spectra of geomagnetic pulsations in the nightside magnetosphere Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2022 4 с. Journal article local Геология. Геологические и геофизические науки. 55 ENG Polyakov Andrey Redzhenaldovich ras.editorum.ru