00645naa#a2200181#i#450# EN\\bibl\22372 20260311054531.3 2712-9640 20181220b2018####ek#y0engy0150####ca RUS RU Detecting groups of equidistant frequencies in spectra of geomagnetic pulsations Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2018 10 с. Journal article local Геология. Геологические и геофизические науки. 55 RUS Polyakov Andrey Redzhenaldovich ras.editorum.ru