Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 17494 10.12737/stp-3220176 Results of current research Results of current research Results of current research Features of formation of small-scale wave disturbances during a sudden magnetospheric compression Features of formation of small-scale wave disturbances during a sudden magnetospheric compression https://orcid.org/0000-0003-1206-8099 Моисеев Алексей Владимирович Moiseev Aleksey Vladimirovich moiseev@ikfia.ysn.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Баишев Дмитрий Гаврильевич Baishev Dmitry Gavrilyevich baishev@ikfia.ysn.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Мишин Владимир Виленович Mishin Vladimir Vilenovich vladm@iszf.irk.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Уозуми Т. Uozumi T. Йошикава Акимаса Yoshikawa Akimasa Ду А. Du A. Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН – обособленное подразделение Федерального исследовательского центра «Якутский научный центр СО РАН». Россия Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН – обособленное подразделение Федерального исследовательского центра «Якутский научный центр СО РАН». Russian Federation Институт космофизических исследований и аэрономии им. Ю.Г. Шафера СО РАН Якутск Россия Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy SB RAS Yakutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Международный центр по науке и образованию в области космической погоды, Университет Кюсю Фукуока Япония International Center for Space Weather Science and Education, Kyushu University Fukuoka Japan Международный центр по науке и образованию в области космической погоды, Университет Кюсю Фукуока Япония International Center for Space Weather Science and Education, Kyushu University Fukuoka Japan Институт геологии и геофизики КАН Пекин Китайская Республика Institute of Geology and Geophysics CAS Beijing Taiwan 3 2 34 42 https://zh-szf.ru/en/nauka/article/17494/view

Quasi-periodic changes of the geomagnetic field and plasma parameters in the range of Pc 5 pulsations, which occurred immediately after the interaction of interplanetary shock (IPS) with Earth’s magnetosphere in the event of April 24, 2009 at 00:53 UT are examined using ground and satellite observations. The pulsations were localized at latitudes 66–74° in the noon (11 MLT) and evening (20 MLT) sectors. The analysis of hodographs of the geomagnetic field changes both from satellite and ground observations has shown the presence of vortical disturbances. In this event, both the IPS front in the interplanetary medium and the compression wave front in the magnetosphere had a slope in the ZGSM=0 plane; the inclination angle was 14° in the interplanetary medium and 34° in the magnetosphere.

Quasi-periodic changes of the geomagnetic field and plasma parameters in the range of Pc 5 pulsations, which occurred immediately after the interaction of interplanetary shock (IPS) with Earth’s magnetosphere in the event of April 24, 2009 at 00:53 UT are examined using ground and satellite observations. The pulsations were localized at latitudes 66–74° in the noon (11 MLT) and evening (20 MLT) sectors. The analysis of hodographs of the geomagnetic field changes both from satellite and ground observations has shown the presence of vortical disturbances. In this event, both the IPS front in the interplanetary medium and the compression wave front in the magnetosphere had a slope in the ZGSM=0 plane; the inclination angle was 14° in the interplanetary medium and 34° in the magnetosphere.

 interplanetary shock sudden geomagnetic impulse geomagnetic pulsations shear flow interplanetary shock sudden geomagnetic impulse geomagnetic pulsations shear flow

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