Development of auroral electrojets and low-latitude geomagnetic disturbances during strong magnetic storms on November 7-11, 2004

doi:10.1134/S0010952510061036

	Development of auroral electrojets and low-latitude geomagnetic disturbances during strong magnetic storms on November 7-11, 2004
	Solovyev, S. I.1; Boroev, R. N.1; Moiseev, A. V.1; Du, A.2; Yumoto, K.3
刊名	COSMIC RESEARCH
	2011-02-01
卷号	49 期号:1 页码:42-55
ISSN号	0010-9525
DOI	10.1134/S0010952510061036
文献子类	Article
英文摘要	The influence of auroral electojets and solar wind parameters on variations in low-latitude geomagnetic disturbances and D (st) during strong magnetic storms on November 7-8, 2004 with D (st) a parts per thousand -380 nT and on November 9-10, 2004 with D (st) a parts per thousand -300 nT is studied on the basis of global geomagnetic observations. It is found that the impulsive variations of the western electrojet intensity with a duration of Delta t a parts per thousand 1-2 h (probably, substorm disturbances) lead to positive low-latitude disturbances of Delta H at I broken vertical bar aEuro(2) a parts per thousand 10A degrees aEuro"30A degrees and to disturbances of the same durations with an amplitude +Delta H similar to 30-100 nT at latitudes of the polar cap (I broken vertical bar aEuro(2) a parts per thousand 75A degrees aEuro"80A degrees). More durable (with Delta t a parts per thousand yen 10 h) convection electrojets whose centers are shifted to latitudes of similar to 50A degrees aEuro"55A degrees in the process of storm development are the main cause of the increase in negative values of Delta H at low latitudes and D (st) . It is shown that meridional dynamics of position of the center of electrojets and the equatorial boundary of the auroral oval is governed by variations (increase or decrease) in the intensity of negative values of the IMF B (z) component. It is assumed that in these storms the intensification of the magnetospheric partially ring current closes the circuit to the ionosphere with the help of field-aligned currents at the equatorial boundary of the auroral oval is the main cause of the magnetic field depression at low latitudes.
WOS关键词	MAGNETOSPHERIC SUBSTORMS ; CURRENT SYSTEM ; DST INDEX ; SATELLITE ; CURRENTS
WOS研究方向	Engineering ; Astronomy & Astrophysics
语种	英语
出版者	MAIK NAUKA/INTERPERIODICA/SPRINGER
WOS记录号	WOS:000287661300004
资助机构	Presidium of RAS(16) ; Presidium of RAS(16) ; Russian Foundation for Basic Research(09-05-98546) ; Russian Foundation for Basic Research(09-05-98546) ; Siberian Branch of RAS(69) ; Siberian Branch of RAS(69) ; Presidium of RAS(16) ; Presidium of RAS(16) ; Russian Foundation for Basic Research(09-05-98546) ; Russian Foundation for Basic Research(09-05-98546) ; Siberian Branch of RAS(69) ; Siberian Branch of RAS(69) ; Presidium of RAS(16) ; Presidium of RAS(16) ; Russian Foundation for Basic Research(09-05-98546) ; Russian Foundation for Basic Research(09-05-98546) ; Siberian Branch of RAS(69) ; Siberian Branch of RAS(69) ; Presidium of RAS(16) ; Presidium of RAS(16) ; Russian Foundation for Basic Research(09-05-98546) ; Russian Foundation for Basic Research(09-05-98546) ; Siberian Branch of RAS(69) ; Siberian Branch of RAS(69)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73474]
专题	中国科学院地质与地球物理研究所
作者单位	1.Inst Cosmophys Res & Aeron, Yakutsk, Russia 2.CAS, Inst Geol & Geophys, Beijing, Peoples R China 3.Kyushu Univ, Fukuoka 812, Japan
推荐引用方式 GB/T 7714	Solovyev, S. I.,Boroev, R. N.,Moiseev, A. V.,et al. Development of auroral electrojets and low-latitude geomagnetic disturbances during strong magnetic storms on November 7-11, 2004[J]. COSMIC RESEARCH,2011,49(1):42-55.
APA	Solovyev, S. I.,Boroev, R. N.,Moiseev, A. V.,Du, A.,&Yumoto, K..(2011).Development of auroral electrojets and low-latitude geomagnetic disturbances during strong magnetic storms on November 7-11, 2004.COSMIC RESEARCH,49(1),42-55.
MLA	Solovyev, S. I.,et al."Development of auroral electrojets and low-latitude geomagnetic disturbances during strong magnetic storms on November 7-11, 2004".COSMIC RESEARCH 49.1(2011):42-55.