Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 51046 10.2205/2022ES000805 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Conjugate properties of Pi3/Ps6 pulsations according to Antarctica-Greenland observations Conjugate properties of Pi3/Ps6 pulsations according to Antarctica-Greenland observations https://orcid.org/0000-0003-0734-6189 Мартинес-Беденко Валерий Армандович Martines-Bedenko Valery Armandovich lera_m0@mail.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;

 Хартингер Майк Hartinger Mike Партамиес Нора Partamies Noora 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 Геофизический центр РАН Москва Россия Geophysical Center RAS Moscow Russian Federation Институт космических исследований Москва Россия Space Research Institute Moscow Russian Federation Институт космических исследований Колорадо США Space Science Institute Колорадо United States of America Университетский центр в Свальбарде Лонгйирбиен Норвегия The University Centre in Svalbard Longyearbyen Norway 26 09 2022 26 09 2022 22 4 1 15 21 06 2022 21 07 2022 https://rjes.ru/en/nauka/article/51046/view

We consider interhemispheric properties of fine structure of substorm – quasi-periodic geomagnetic fluctuations, Pi3 pulsations, using data from conjugate magnetometers in Antarctica and Greenland. Pi3 pulsations are found to accompany both the substorm expansion/recovery phases and the steady magnetospheric convection (SMC) events. The epicenter of Pi3 power is at the same latitude as maximal amplitude of magnetic bays. The interhemispheric properties of Pi3 pulsations are not consistent: in some events, coherent in-phase magnetic oscillations are observed in both hemispheres, in others, periodic variations are observed in one hemisphere only. When Pi3 pulsations are observed in both conjugate sites, their H-components are in-phase, which corresponds to the fundamental mode of field line oscillations between high-conductive ionospheres. Conjugate observations have provided an additional information on an elusive mechanism of Pi3 pulsations.

We consider interhemispheric properties of fine structure of substorm – quasi-periodic geomagnetic fluctuations, Pi3 pulsations, using data from conjugate magnetometers in Antarctica and Greenland. Pi3 pulsations are found to accompany both the substorm expansion/recovery phases and the steady magnetospheric convection (SMC) events. The epicenter of Pi3 power is at the same latitude as maximal amplitude of magnetic bays. The interhemispheric properties of Pi3 pulsations are not consistent: in some events, coherent in-phase magnetic oscillations are observed in both hemispheres, in others, periodic variations are observed in one hemisphere only. When Pi3 pulsations are observed in both conjugate sites, their H-components are in-phase, which corresponds to the fundamental mode of field line oscillations between high-conductive ionospheres. Conjugate observations have provided an additional information on an elusive mechanism of Pi3 pulsations.

 Pi3 pulsations conjugate observations steady magnetospheric convection The study is supported by the Russian Science Foundation grant 20-05-00787 (VMB) and grant ES647692 from the program INTPART of Research Council of Norway (NP). MDH was supported by NSF AGS-2027210 and NSF PLR-1744828. The study is supported by the Russian Science Foundation grant 20-05-00787 (VMB) and grant ES647692 from the program INTPART of Research Council of Norway (NP). MDH was supported by NSF AGS-2027210 and NSF PLR-1744828.

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