Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 81456 10.12737/stp-103202415 19TH ANNUAL CONFERENCE “PLASMA PHYSICS IN THE SOLAR SYSTEM”. FEBRUARY 5–9, 2024, SPACE RESEARCH INSTITUTE RAS, MOSCOW, RUSSIA 19TH ANNUAL CONFERENCE “PLASMA PHYSICS IN THE SOLAR SYSTEM”. FEBRUARY 5–9, 2024, SPACE RESEARCH INSTITUTE RAS, MOSCOW, RUSSIA 19TH ANNUAL CONFERENCE “PLASMA PHYSICS IN THE SOLAR SYSTEM”. FEBRUARY 5–9, 2024, SPACE RESEARCH INSTITUTE RAS, MOSCOW, RUSSIA Long-period geomagnetic pulsations as an element of the space weather influence on technologocal systems Long-period geomagnetic pulsations as an element of the space weather influence on technologocal systems https://orcid.org/0000-0003-0678-8743 Ягова Надежда Викторовна Yagova Nadezda Viktorovna nyagova@ifz.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Сахаров Ярослав Алексеевич Sakharov Yaroslav Alekseevich sakharov@pgia.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0000-0003-3056-7465 Пилипенко Вячеслав Анатольевич Pilipenko Vyacheslav Anatolievich space.soliton@gmail.com

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 https://orcid.org/0000-0001-5681-065X Селиванов Василий Николаевич Selivanov Vasiliy Nikolaevich v.selivanov@ksc.ru

кандидат технических наук;

candidate of technical sciences;

 Институт физики Земли им. О.Ю. Шмидта РАН Москва Россия Schmidt Institute of Physics of the Earth RAS Moscow Russian Federation Геофизический центр РАН Москва Россия Geophysical Center of the Russian Academy of Sciences Moscow Russian Federation Полярный Геофизический Институт Апатиты Россия Polar Geophysical Institute Apatity Russian Federation Центр физико-технических проблем энергетики Севера КНЦ РАН Апатиты Россия Nothern Energetics Research Centre KSC RAS Apatity Russian Federation Геофизический центр РАН Москва Россия Geophysical Center of the Russian Academy of Sciences Moscow Russian Federation Институт физики Земли им. О.Ю. Шмидта РАН Москва Россия Schmidt Institute of Physics of the Earth RAS Moscow Russian Federation Геофизический центр РАН Москва Россия Geophysical Center RAS Moscow Russian Federation Институт космических исследований Москва Россия Space Research Institute Moscow Russian Federation Центр физико-технических проблем энергетики Севера КНЦ РАН Апатиты Россия Northern Energetics Research Centre KSC RAS Apatity Russian Federation 29 09 2024 29 09 2024 10 3 137 146 09 04 2024 06 05 2024 https://naukaru.ru/en/nauka/article/81456/view

We analyze variations in geomagnetically induced currents (GIC) and pulsations of the geomagnetic field latitudinal By component in the frequency range 1–20 mHz. The analysis is based on the data from GIC registration at the Kola Peninsula and magnetic data from IMAGE network stations, obtained with 10 s sampling in 2017. This allows us to include pulsations of both Pc5/Pi3 and Pc4/Pi2 frequency range in the analysis and examine polyharmonic pulsations with spectral maxima in both ranges. It is shown that GICs are effectively generated at frequencies above 5 mHz. Polyharmonic pulsations are potentially more dangerous than monoharmonic ones because the ratio of GIC to magnetic field pulsations’ amplitude is higher and the lifetime of unipolar GIC is longer.

We analyze variations in geomagnetically induced currents (GIC) and pulsations of the geomagnetic field latitudinal By component in the frequency range 1–20 mHz. The analysis is based on the data from GIC registration at the Kola Peninsula and magnetic data from IMAGE network stations, obtained with 10 s sampling in 2017. This allows us to include pulsations of both Pc5/Pi3 and Pc4/Pi2 frequency range in the analysis and examine polyharmonic pulsations with spectral maxima in both ranges. It is shown that GICs are effectively generated at frequencies above 5 mHz. Polyharmonic pulsations are potentially more dangerous than monoharmonic ones because the ratio of GIC to magnetic field pulsations’ amplitude is higher and the lifetime of unipolar GIC is longer.

 space weather geomagnetic pulsations geomagnetically induced currents space weather geomagnetic pulsations geomagnetically induced currents The work was financially supported by RSF Grant No. 21-77-30010 [http://rscf.ru/prjcard/?rid=21-77-30010] The work was financially supported by RSF Grant No. 21-77-30010 [http://rscf.ru/prjcard/?rid=21-77-30010]

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