Investigation of Geomagnitic Pulsations Рс5 on Two-Dimensional Network of Stations

Capa

Citar

Texto integral

Acesso aberto Acesso aberto
Acesso é fechado Acesso está concedido
Acesso é fechado Somente assinantes

Resumo

A detailed study of geomagnetic pulsations of Рс5 with a frequency of ~ 2.8 mHz was carried out using data from the two-dimensional IMAGE network and magnetic stations located on the territory of Russia. Pc5 events occurred in the afternoon sector against the background of a magnetic storm on 27.08.2014 after 5-day period with low magnetic activity. In two-time intervals – at the beginning of the storm and during the period of maximum magnetic activity, instantaneous two-dimensional distributions of the magnetic field components Рс5 on the Earth’s surface were plotted. It was found that the ionospheric sources of Рс5 (Hall current vortices) have an elliptical shape with a larger axis in the south-north direction. At the beginning of the magnetic storm, a single burst of Рс5 pulsations was detected, the source center of which was located at the geomagnetic latitude ~ 67.5° (L ~ 6.8 Re) and it moved westward with a speed of ~ 0.7 km/s. The estimated size of this ionospheric source is ~ 150 km in the west-east direction and ~ 330 km in the south-north direction. During the maximum period of the magnetic storm, the Рс5 pulsations are produced by two ionospheric sources following each other. These ionospheric sources have a more elongated elliptical shape with axis sizes in the west-east direction ~ 250 km and in the south-north direction ~ 670 km. The centers of these sources shifted by 4° to the more southern geomagnetic latitude ~ 63.5° (L ~ 5 Re) and moved westward with a velocity of ~ 1.7 km/s. We present estimates of the size of the magnetic force tube, in which the resonant MHD waves appeared, and the speed of its displacement in the equatorial plane of the magnetosphere.

Texto integral

Acesso é fechado

Sobre autores

Yu. Kopytenko

Saint Petersburg Branch of the Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences

Autor responsável pela correspondência
Email: office@izmiran.spb.ru
Rússia, Saint Petersburg

V. Ismagilov

Saint Petersburg Branch of the Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences

Email: office@izmiran.spb.ru
Rússia, Saint Petersburg

Bibliografia

  1. Белаховский В.Б., Козловский А.Е., Пилипенко В.А. Определение широтного профиля резонансной частоты Рс5 по данным радара EISCAT // Вестн. КНЦ РАН. Т. 3 (22). С. 67. 2015.
  2. Большакова О.В., Боровкова О.К., Клейменова Н.Г. и др. Магнитная буря 1989 года: структура экстремально возмущенной магнитосферы по геомагнитным пульсациям Рс5 // Геомагнетизм и аэрономия. Т. 34. №4. С. 73–83. 1994.
  3. Клейменова Н.Г., Козырева О.В. Пространственно-временная динамика геомагнитных пульсаций Pi3 и Pc5 во время экстремальных магнитных бурь в октябре 2003 г. // Геомагнетизм и аэрономия. Т. 45. № 1. С. 75–83. 2005а.
  4. Клейменова Н.Г., Козырева О.В. Интенсивные геомагнитные пульсации Рс5 в восстановительную фазу супербурь октября и ноября 2003 г. // Геомагнетизм и аэрономия. Т. 45. №5. С. 597–612. 2005б.
  5. Ляцкий В.Б., Мальцев Ю.П. Магнитосферно-ионосферное взаимодействие / М. Наука, 192 с. 1983.
  6. Оберц П., Распопов О.М. Исследование пространственных характеристик пульсаций геомагнитного поля Рс5 // Геомагнетизм и аэрономия. Т.8. №3. С. 534−539. 1968.
  7. Потапов А.С., Цэгмед Б., Полюшкина Т.Н. Вклад глобальных колебаний Рс5 в магнитную возмущенность во время геомагнитных бурь // Солнечно-земная физика. Вып. 12. Т. 1. С. 142–147. 2008. https://sciup.org/14210330
  8. Пудовкин М.И., Распопов О.М., Клейменова Н.Г. Возмущения электромагнитного поля Земли. Часть II. Короткопериодические колебания геомагнитного поля / Л., Изд. Ленингр. Ун-та, 271 с. 1976.
  9. Троицкая В.А. Короткопериодные возмущения электромагнитного поля Земли / В кн.: Вопросы изучения переменных электромагнитных полей в Земле. М., С. 27.−61. 1956.
  10. Goldstein J., Sandel B.R., Hairston M.R. and Reiff P.H. Control of plasmaspheric dynamics by both convection and subauroral polarization stream // Geoph. Res. Let.V.30. N. 24. P.1–5. 2003. https://doi.org/10.1029/2003GL018390
  11. Hudson M.K., Denton R.E., Lessard M.R.,et al. A study of Pc-5 ULF oscillations // Ann. Geophys. V. 22. P. 289–302. 2004. https://doi.org/10.5194/angeo-22-289-2004
  12. Dmitriev A., Chao J.-K., Thomsen M., Suvorova A. Geosynchronous magnetopause crossings on 29–31 October 2003 // J. Geophys. Res. V. 110. N A08209. 2005. doi:10.1029/ 2004JA010582
  13. Kleimenova N.G., Kozyreva O.V., Manninen J., Ranta A. Unusual strong quasi-monochromatic ground geomagnetic Pc5 pulsations in the recovery phase of November 2003 super-storm // Ann. Geophys. V.23. P. 2621–2634. 2005. https://doi.org/10.5194/angeo-23-2621-2005
  14. Lee E.A., Mann I.R., Loto`aniu T.M., Dent Z.C. Global Pc5 pulsations observed at unusually low L during the great magnetic storm of 24 March 1991 // J. Geophys. Res. V.112. N A05208. 2007. https://doi.org/10.5194/angeo-32-319-2014
  15. Moldwin M.B., Downward L., Rassoul H.K., Amin R., Anderson R.R. A new model of the location of the plasmapause: CRRES results // J. Geophys. R. V.107. N. A11. P.1339. 2002. https://doi.org/10.1029/2001JA009211
  16. Motoba T., Kikuchi T., Luhr H., et al. Global Pc5 caused by Dp-2-type ionospheric current system // Ibid. V. 107. N A2. 2002. https://doi.org/10.1029/2001JA900156
  17. McGenry M.A., Clauer C.R., Friis-Christensen E., Newell P.T., Kelly J.D. Ground Observations of Magnetospheric Boundary Layer Phenomena // J. Geophys. R. V. 95. NO. A9. P. 14995−15005. 1990. https://doi.org/OI:10.1029/JA095P14995
  18. Pilipenko V.A., Kleimenova N.G., Kozyreva O.V., et al. Global ULF wave activity during the May 15, 1997 magnetic storm // J. Atmosph. Solar-Terr. Physics. V.63. P. 489−501. 2001. https://doi.org/oi:10.2205/2017ES000597
  19. Pilipenko V.A., Kozyreva O.V., et al. Dynamics of long-period magnetic activity and energetic particle precipitation during the May 15, 1997 storm // J. Atmosph. Solar-Terrestrial Phys. V.64. P.831−843. 2002. https://doi.org/10.1016/S1364-6826(02)00074-3
  20. Southwood D.J. Some features of field line resonances in the magnetosphere // Planet. Space Sci. V. 22. № 3. P. 483−491. 1974. https://doi.org/10.1016/0032-0633 (74) 90078-6
  21. Tagirov V.R., Ismagilov V.S. Formation of auroral torch structure / In book: Полярные геомагнитные возмущения и связанные с ними явления. Апатиты, изд. КНЦ АН СССР, с.88–91. 1989.
  22. Trivedi N.B., Arora B.R., Padiha A.L., et al. Global Pc5 geomagnetic pulsations of March 24, 1991, as observed along the American sector // Geophys. Res. Lett., V. 24. P. 1683–1687. 1997.
  23. Yumoto K., Saito T. Hydromagnetic wave driven by velocity shear instability in the magnetospheric boundary layer // Planet. Space Sci. V. 28. P.789. 1980.

Arquivos suplementares

Arquivos suplementares
Ação
1. JATS XML
Baixar
2. Fig. 1. Location of three-component magnetic stations of the two-dimensional IMAGE network and 4 stations located in Russia: LEH-Lekhta, KAP-Karpogory, LOV-Lovozero, LOP-Loparskaya.

Baixar (278KB)
Metadados
3. Fig. 2. Variations of the H-component at 5 magnetic stations located along the geomagnetic latitude 64° (left) and variations of the D-component Pc5 in the range of periods T =320-400 s (right), 27.08.2014. The dashed bars are intervals for constructing two-dimensional distributions of the amplitudes of the magnetic field components on the Earth's surface. Vertical arrows mark the local noon.

Baixar (263KB)
Metadados
4. Fig. 3. Changes in the Dst-index for the period 22.08-28.08.2014.

Baixar (74KB)
Metadados
5. Fig. 4. Instantaneous two-dimensional distributions of the amplitudes of the H-, D-, and Z-components of Ps5 pulsations at the time intervals 11:12-11:26 UT (left) and 14:16-14:30 UT (right) on 27.08.2014. White dashed lines are the projection of the plasmapause (lower in the upper frames) and the geomagnetic latitude of the centres of Ps5 sources. The sloping white lines connect the extrema of the distributions.

Baixar (534KB)
Metadados
6. Fig. 5. Magnetograms of three components of magnetic field variations 15:30-18:30 LT 27.08.2014 p. Lekhta filtered in the range of periods T = 320-400 s. The shaded band marks the interval 14:16-14:30 UT 27.08.2014.

Baixar (171KB)
Metadados

Declaração de direitos autorais © Russian Academy of Sciences, 2024