Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1134/S001095251504005X

Аннотация: The space–time characteristics of geomagnetic pulsations during a sudden impulse on August 4, 2010 have been analyzed using ground-based and satellite observations. It has been indicated that two types of geomagnetic pulsations with different spatial extensions, oscillation frequencies, and generations were observed at that time. It has been found that geomagnetic pulsations with identical oscillation frequencies (?4.5 mHz) at different latitudes were observed, with a maximal amplitude in the dusk sector. Oscillations with close frequencies were registered in the solar wind in the IMF B<inf>z</inf> component. Higher-frequency (7–10 mHz) pulsations dependent on latitude were registered on the dawn side. It is assumed that geomagnetic pulsations with frequencies of ?4.5 mHz were caused by oscillations penetrating from the interplanetary medium, and higher-frequency pulsations were Alfven resonance oscillations generated during the compression of the magnetosphere. An asymmetric oscillation amplitude distribution relative to noon was caused by the IMF orthospiral orientation in this event. © 2015, Pleiades Publishing, Ltd.

Журнал: Cosmic Research

Выпуск журнала: Vol. 53, Is. 4

Номера страниц: 257-266

• Moiseyev A.V. (Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy, Siberian Branch, Russian Academy of Sciences, pr. Lenina 31, Yakutsk, Russian Federation)
• Popov V.I. (Ammosov Northeastern Federal University, Yakutsk, Russian Federation)
• Mullayarov V.A. (Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy, Siberian Branch, Russian Academy of Sciences, pr. Lenina 31, Yakutsk, Russian Federation, Ammosov Northeastern Federal University, Yakutsk, Russian Federation)
• Samsonov S.N. (Yu. G. Shafer Institute of Cosmophysical Research and Aeronomy, Siberian Branch, Russian Academy of Sciences, pr. Lenina 31, Yakutsk, Russian Federation)
• Du A. (Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China)
• Yoshikawa A. (International Center for Space Weather Science and Education, Kyushu University, Tokyo, Japan)

• Scopus