Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 109302 10.12737/stp-114202503 Results of current research Results of current research Results of current research EXCITATION OF GLOBAL ARTIFICIAL Pc1 SIGNALS DURING FENICS-2024 EXPERIMENT: 2. MODELING EXCITATION OF GLOBAL ARTIFICIAL Pc1 SIGNALS DURING FENICS-2024 EXPERIMENT: 2. MODELING 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/0000-0001-5516-3155 Федоров Евгений Николаевич Fedorov Evgeny Nikolaevich enfedorov1@yandex.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 https://orcid.org/0000-0003-1985-8384 Мазур Николай Григорьевич Mazur Nikolay Grigorievich ngmazur@mail.ru

кандидат химических наук;

candidate of chemical sciences;

 https://orcid.org/0000-0002-9117-7498 Ермакова Елена Николаевна Ermakova Elena Nikolaevna l.ermakova@nirfi.unn.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0000-0002-8460-1203 Рябов Александр Владимирович Ryabov Alexsandr Vladimirovich alexr@nirfi.unn.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0000-0002-4864-0993 Потапов Александр Сергеевич Potapov Alexander Sergeevich potapov@iszf.irk.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Марчук Роман Александрович Marchuk Roman Aleksandrovich marchuk@mail.iszf.irk.ru https://orcid.org/0000-0002-7541-3219 Колобов Виталий Валентинович Kolobov Vitaliy Valentinovich v.kolobov@ksc.ru

кандидат технических наук;

candidate of technical sciences;

 https://orcid.org/0000-0002-9042-2842 Анисимов Сергей Васильевич Anisimov Sergey Vasilevich anisimov@borok.yar.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Позднякова Дарья Дмитриевна Pozdnyakova Daria Dmitrievna d_pozdnyakova@live.ru 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 Институт физики Земли им. О.Ю. Шмидта РАН Москва Россия Schmidt Institute of Physics of the Earth RAS Moscow Russian Federation Институт физики Земли им. О.Ю. Шмидта РАН Москва Россия Schmidt Institute of Physics of the Earth, RAS Moscow Russian Federation Научно-исследовательский радиофизический институт Нижегородского университета Н. Новгород Россия Institute of Radiophysics of Nizhny Novgorod University Nizhny Novgorod Russian Federation Научно-исследовательский радиофизический институт Нижегородского университета Н. Новгород Россия Institute of Radiophysics of Nizhny Novgorod University Nizhny Novgorod Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН RU Institute of Solar-Terrestrial Physics SB RAS RU Центр физико-технических проблем энергетики Севера КНЦ РАН Апатиты Россия Northern Energetics Research Centre KSC RAS Apatity Russian Federation Геофизическая обсерватория «Борок», филиал Института физики Земли им. О.Ю. Шмидта РАН Борок Россия Borok Geophysical Observatory of Schmidt Institute of Physics of the Earth RAS Borok Russian Federation Институт физики Земли им. О.Ю. Шмидта РАН Москва Россия Schmidt Institute of Physics of the Earth RAS Moscow Russian Federation 10 12 2025 10 12 2025 11 4 39 48 01 03 2025 10 06 2025 https://naukaru.ru/en/nauka/article/109302/view

During the active experiment FENICS-2024 on the Kola Peninsula using a decommissioned power transmission line as a horizontal radiating antenna, ultra-low-frequency signals of the 1–6 Hz range were recorded at magnetic stations located from ~1600 km to ~2100 km from the transmission line with normalized amplitudes from ~0.3 fT/A to ~0.8 fT/A. Observational results are compared with approximate analytical estimates of the magnetic field excited by the magnetic dipole. The calculations turned out to be in qualitative agreement with the observational results. To assess the possible response in the upper ionosphere, a numerical model of the ULF field in the atmosphere and ionosphere generated by the horizontal surface current was employed. The model is based on solving the system of Maxwell equations in the vertically inhomogeneous atmosphere and ionosphere. The fundamental feature of this model is that it correctly takes into account the contribution of ionospheric waveguide propagation. The observational results supported by numerical simulation have shown the potential of active experiments of the new type for signal generation for large-area magnetotelluric sounding and for modification of near-Earth plasma with artificial signals.

During the active experiment FENICS-2024 on the Kola Peninsula using a decommissioned power transmission line as a horizontal radiating antenna, ultra-low-frequency signals of the 1–6 Hz range were recorded at magnetic stations located from ~1600 km to ~2100 km from the transmission line with normalized amplitudes from ~0.3 fT/A to ~0.8 fT/A. Observational results are compared with approximate analytical estimates of the magnetic field excited by the magnetic dipole. The calculations turned out to be in qualitative agreement with the observational results. To assess the possible response in the upper ionosphere, a numerical model of the ULF field in the atmosphere and ionosphere generated by the horizontal surface current was employed. The model is based on solving the system of Maxwell equations in the vertically inhomogeneous atmosphere and ionosphere. The fundamental feature of this model is that it correctly takes into account the contribution of ionospheric waveguide propagation. The observational results supported by numerical simulation have shown the potential of active experiments of the new type for signal generation for large-area magnetotelluric sounding and for modification of near-Earth plasma with artificial signals.

 ULF radiation FENICS installation active experiments transmission lines Pc1 pulsations atmospheric waveguide ionospheric waveguide ULF radiation FENICS installation active experiments transmission lines Pc1 pulsations atmospheric waveguide ionospheric waveguide The work was carried out under Government assignments of the Ministry of Science and Higher Education of the Russian Federation by IPE RAS (FMWU-2025-0043, FMWU-2025-0049), SUNN NIRPhI (FSWR-2023-0038), and ISTP SB RAS (FWSE-2021-0005). Works on the use of PTLs as radiating antennas were undertaken by NERC KSC with the financial support from RSF (Grant No. 22-17-00208) The work was carried out under Government assignments of the Ministry of Science and Higher Education of the Russian Federation by IPE RAS (FMWU-2025-0043, FMWU-2025-0049), SUNN NIRPhI (FSWR-2023-0038), and ISTP SB RAS (FWSE-2021-0005). Works on the use of PTLs as radiating antennas were undertaken by NERC KSC with the financial support from RSF (Grant No. 22-17-00208)

 

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