Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 23010 10.12737/stp-43201808 Results of current research Results of current research Results of current research Magnetospheric response of two types in PSc geomagnetic pulsations to interaction with interplanetary shock waves Magnetospheric response of two types in PSc geomagnetic pulsations to interaction with interplanetary shock waves Пархомов Владимир Александрович Parhomov Vladimir Aleksandrovich pekines_41@mail.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Бородкова Наталия Львовна Borodkova Natalia Lvovna nlbor@mail.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Яхнин Александр Григорьевич Yahnin Aleksandr Grigoryevich yahnin@pgia.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Теро Райта Tero Raita tero.raita@sgo.fi Цэгмэд Баттуулай Tsegmed Battuulai tseg@iag.ac.mn

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Хомутов Сергей Юрьевич Khomutov Sergey Yuryevich hom@ngs.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Пашинин Александр Юрьевич Pashinin Aleksandr Yuryevich pash@iszf.irk.ru Чиликин Виталий Эдуардович Chilikin Vitaliy Eduardovich Мочалов Алексей Анатольевич Mochalov Aleksey Anatolyevich mochalov@pgia.ru Байкальский государственный университет Иркутск Россия Baikal state university Irkutsk Russian Federation Институт космических исследований РАН Москва Россия Institute of Space Research RAS Moscow Russian Federation Полярный геофизический институт Апатиты Россия Polar Geophysical Institute Apatity Russian Federation Геофизическая обсерватория Соданкюля Соданкюля Финляндия Sodankylä Geophysical Observatory Sodankylä Finland Институт астрономии и геофизики АН Монголии Улан-Батор Монголия Institute of Astronomy and Geophysics AS Mongolia Ulaan-Baatar Mongolia Институт космофизических исследований и распространения радиоволн ДВО РАН Паратунка Россия Institute of Cosmophysical Research and Radio Wave Propagation FEB RAS Paratunka Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Байкальский государственный университет Baikal State University Полярный геофизический институт Апатиты Россия Polar Geophysical Institute Apatity Russian Federation 4 3 52 66 https://zh-szf.ru/en/nauka/article/23010/view

Using the June 22, 2015 event as an example, we present new data confirming the presence of a precursor of the sudden magnetic impulse caused by a powerful interplanetary shock wave (ISW). The precursor in the form of a train of oscillations (broadband pulse) with a falling frequency in the range 0.25÷11 Hz with a duration of ~20 s, which had a spectral resonance structure, was recorded globally by a network of induction magnetometers at 18:33:27 UT. No significant phase delays of the signals were detected in four frequency bands at widely spaced observatories. It is suggested that the impulse can be excited in the Earth – ionosphere waveguide by a pulsed electric field which occurs in the ionosphere due to the short-term impact of ISW on the magnetosphere.

Using the June 22, 2015 event as an example, we present new data confirming the presence of a precursor of the sudden magnetic impulse caused by a powerful interplanetary shock wave (ISW). The precursor in the form of a train of oscillations (broadband pulse) with a falling frequency in the range 0.25÷11 Hz with a duration of ~20 s, which had a spectral resonance structure, was recorded globally by a network of induction magnetometers at 18:33:27 UT. No significant phase delays of the signals were detected in four frequency bands at widely spaced observatories. It is suggested that the impulse can be excited in the Earth – ionosphere waveguide by a pulsed electric field which occurs in the ionosphere due to the short-term impact of ISW on the magnetosphere.

 sudden magnetic impulse global precursor broadband burst of geomagnetic pulsations spectral resonance structure Earth – ionosphere resonator ionospheric Alfvén resonator sudden magnetic impulse global precursor broadband burst of geomagnetic pulsations spectral resonance structure Earth – ionosphere resonator ionospheric Alfvén resonator

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