00853naa#a2200217#i#450# EN\INFRA-M\bibl\75782 20241121175217.4 2712-9640 20240625b2024####ek#y0engy0150####ca RU Variability of ionospheric ionization over Eurasia according to data from a high-latitude ionosonde chain during extreme magnetic storms in 2015 Journal article Moscow INFRA-M Academic Publishing LLC. 2024 14 с. Journal article local Геология. Геологические и геофизические науки. 55 Chernigovskaya Marina Arturovna Setov Artem Gennadyevich Ratovsky Konstantin Gennadyevich Kalishin Alexey Sergeevich Stepanov Aleksandr Egorovich zh-szf.ru