X lines in the magnetotail for southward and northward IMF conditions

L. Q. Zhang; J. Y. Wang; W. Baumjohann; H. Rème; L. Dai; M. W. Dunlop; T. Chen; Y. Huang

doi:10.1002/2015JA021503

X lines in the magnetotail for southward and northward IMF conditions

L. Q. Zhang, J. Y. Wang, W. Baumjohann, H. Rème, L. Dai, M. W. Dunlop, T. Chen, Y. Huang

College of Science & Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Utilizing associated observations of Geotail and ACE satellites from the year of 1998 to 2005, we investigated the X lines in the near-Earth tail under different interplanetary magnetic field (IMF) conditions. The X lines are recognized by the tailward fast flows with negative B_z. Statistically, the X lines in the tail can be observed for southward as well as northward IMF, but more frequently observed for southward IMF. A typical case on 26 April 2005 showed clear evidence that the X line can occur for northward IMF while the geomagnetic activity is particularly quiet. Further analysis showed that the X line-related solar wind has stronger E_y and B_z components for southward than northward IMF. In addition, the X line-related geomagnetic activities are stronger for southward than northward IMF.

Original language	English (US)
Pages (from-to)	7764-7773
Number of pages	10
Journal	Journal of Geophysical Research: Space Physics
Volume	120
Issue number	9
DOIs	https://doi.org/10.1002/2015JA021503
State	Published - Sep 1 2015

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©2015. American Geophysical Union. All Rights Reserved.

Keywords

AE index
IMF condition
X line
solar wind
substorm

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10.1002/2015JA021503

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title = "X lines in the magnetotail for southward and northward IMF conditions",

abstract = "Utilizing associated observations of Geotail and ACE satellites from the year of 1998 to 2005, we investigated the X lines in the near-Earth tail under different interplanetary magnetic field (IMF) conditions. The X lines are recognized by the tailward fast flows with negative Bz. Statistically, the X lines in the tail can be observed for southward as well as northward IMF, but more frequently observed for southward IMF. A typical case on 26 April 2005 showed clear evidence that the X line can occur for northward IMF while the geomagnetic activity is particularly quiet. Further analysis showed that the X line-related solar wind has stronger Ey and Bz components for southward than northward IMF. In addition, the X line-related geomagnetic activities are stronger for southward than northward IMF.",

keywords = "AE index, IMF condition, X line, solar wind, substorm",

author = "Zhang, {L. Q.} and Wang, {J. Y.} and W. Baumjohann and H. R{\`e}me and L. Dai and Dunlop, {M. W.} and T. Chen and Y. Huang",

year = "2015",

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doi = "10.1002/2015JA021503",

language = "English (US)",

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journal = "Journal of Geophysical Research: Space Physics",

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TY - JOUR

T1 - X lines in the magnetotail for southward and northward IMF conditions

AU - Zhang, L. Q.

AU - Wang, J. Y.

AU - Baumjohann, W.

AU - Rème, H.

AU - Dai, L.

AU - Dunlop, M. W.

AU - Chen, T.

AU - Huang, Y.

PY - 2015/9/1

Y1 - 2015/9/1

N2 - Utilizing associated observations of Geotail and ACE satellites from the year of 1998 to 2005, we investigated the X lines in the near-Earth tail under different interplanetary magnetic field (IMF) conditions. The X lines are recognized by the tailward fast flows with negative Bz. Statistically, the X lines in the tail can be observed for southward as well as northward IMF, but more frequently observed for southward IMF. A typical case on 26 April 2005 showed clear evidence that the X line can occur for northward IMF while the geomagnetic activity is particularly quiet. Further analysis showed that the X line-related solar wind has stronger Ey and Bz components for southward than northward IMF. In addition, the X line-related geomagnetic activities are stronger for southward than northward IMF.

AB - Utilizing associated observations of Geotail and ACE satellites from the year of 1998 to 2005, we investigated the X lines in the near-Earth tail under different interplanetary magnetic field (IMF) conditions. The X lines are recognized by the tailward fast flows with negative Bz. Statistically, the X lines in the tail can be observed for southward as well as northward IMF, but more frequently observed for southward IMF. A typical case on 26 April 2005 showed clear evidence that the X line can occur for northward IMF while the geomagnetic activity is particularly quiet. Further analysis showed that the X line-related solar wind has stronger Ey and Bz components for southward than northward IMF. In addition, the X line-related geomagnetic activities are stronger for southward than northward IMF.

KW - AE index

KW - IMF condition

KW - X line

KW - solar wind

KW - substorm

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DO - 10.1002/2015JA021503

M3 - Article

AN - SCOPUS:84945144028

SN - 2169-9380

VL - 120

SP - 7764

EP - 7773

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

IS - 9

ER -

X lines in the magnetotail for southward and northward IMF conditions

Abstract

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Keywords

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