Evolution of the subauroral polarization stream oscillations during the severe geomagnetic storm on 20 November 2003

We report multisatellite observations of the oscillations in the subauroral polarization stream (SAPS) during a severe magnetic storm on 20 November 2003. The SAPS oscillations (SAPSOs) occurred during the main phase of the magnetic storm when the y component of the southward interplanetary magnetic field (IMF B-Y) turned from positive to negative. The SAPSOs were first observed in the premidnight sector and propagated toward the dusk sector. The formation and evolution of SAPSO corresponded well with the plasma sheet ions injection and precipitation, indicating that the SAPSOs are possibly generated by the interaction between the hot plasma sheet and the cold plasmasphere under particular conditions (e.g., change of the polarity of IMF B-Y accompanied with a sudden enhancement of plasma sheet ion density). The hemispheric asymmetry of the SAPS channels is suggested to be related to the hemispheric differences in the ionospheric plasma condition and the ionospheric convection.

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Author He, Fei
Zhang, Xiao-Xin
Wang, Wenbin
Pu, Zu-Yin
Zong, Qiu-Gang
Yao, Zhonghua
Wei, Yong
Ren, Zhi-Peng
Yue, Xinan
Liu, Libo
Wan, Weixing
Publisher UCAR/NCAR - Library
Publication Date 2019-01-25T00:00:00
Digital Object Identifier (DOI) Not Assigned
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:07:41.235054
Metadata Record Identifier edu.ucar.opensky::articles:22332
Metadata Language eng; USA
Suggested Citation He, Fei, Zhang, Xiao-Xin, Wang, Wenbin, Pu, Zu-Yin, Zong, Qiu-Gang, Yao, Zhonghua, Wei, Yong, Ren, Zhi-Peng, Yue, Xinan, Liu, Libo, Wan, Weixing. (2019). Evolution of the subauroral polarization stream oscillations during the severe geomagnetic storm on 20 November 2003. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d7z60s3r. Accessed 25 May 2024.

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