Global geomagnetic response to a sharp compression of the magnetosphere and IMF variations on October 29, 2003
Глобальный геомагнитный отклик на резкое сжатие магнитосферы и вариации ММП 29 октября 2003 г.
Global geomagnetic response to a sharp compression of the magnetosphere and IMF variations on October 29, 2003
Статья в журнале
Русский
Библиогр. в конце ст. (19 назв.)
550.380; 550.385.37
ионосферный отклик; магнитосферный отклик; магнитная буря; вариации ММП; суббуревые возмущения; магнитное поле; солнечный ветер; электроструи; компрессионные колебания; геомагнитные наблюдения
Геофизика / Геомагнетизм и высокие слои атмосферы
Космические исследования. – 2004. – Т. 42, N 6
С. 622-631
Космические исследования
Москва, Наука
0023-4206 (print)
Журнал является рецензируемым, включен в Перечень ВАК, входит в систему РИНЦ
РИНЦ 2017: 0,993
Abstract—We study a response of the ionosphere and magnetosphere to a sudden commencement (SC) on October 29, 2003 at 06.11 UT. It is shown that the geomagnetic response had a form of two successive stages. In the first ~5 min after the SC a strong intensification of a two-vortex current system of the DP2 type was observed in latitudes ~67–65°, with variations of ΔH within the range from –4000 nT to +700 nT. At the same time, energetic electrons are injected without dispersion to geosynchronous orbits simultaneously in the sectors ~16, ~04, and ~07 MLT. In the subsequent 5–15 min a new intensification of the western electrojet took place in all time sectors at latitudes ~70°. In near midnight hours this electrojet was extended in the poleward direction up to the polar cap latitudes (Φ' ≈ 75–83°). It had unusually high velocity of extension (up to ~5.0 km/s) and was accompanied by typical dispersionlesssubstorm injections, but only at meridians ~04 and 07 MLT. By comparing the development of electrojets with the data of satellite observations in the solar wind and magnetosphere we suggest that in ~3–5 min after the SC onset a dipolization of the magnetic field at the geosynchronous orbit has occurred. It was connected with the decay of the current flowing across the magnetotail. The subsequent extension of the region of current decay into the tail up to 150 RE proceeded with a velocity of ≥1000 km/s, which exceeds the known velocities of such an extension by a factor of ~5.
Глобальный геомагнитный отклик на резкое сжатие магнитосферы и вариации ММП 29 октября 2003 г. / С. И. Соловьев, А. В. Моисеев, В. А. Муллаяров, А. Ду, М. Енгебретсон, Л. Ньювит // Космические исследования. – 2004. – Т. 42, N 6. – С. 622–631.
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