Record number :
1132632
Title of article :
Cluster observations of earthward propagating plasmoid and flux ropes in the near-tail during the course of a substorm event Original Research Article
Author/Authors :
C.L. Tang، نويسنده , , Z.Y. Li، نويسنده , , L. Lu، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2009
Pages :
6
From page :
1337
To page :
1342
Abstract :
We analyze the magnetic structures in the near-tail at Xgsm = −17.5 Re on September 19, 2003 by Cluster. During the course of a substorm event, the earthward propagating plasmoid and flux ropes in the near-tail are observed. The earthward propagating plasmoid is associated with the bipolar Bz and By signatures. The two flux ropes are embedded within the earthward plasma flows, which might be referred to the population as ‘‘BBF-type’’ flux ropes. The first flux rope diameter is about 0.7 Re and duration based upon the Bz signature is ∼20 s, while the second one diameter is about 1.4 Re and duration is ∼30 s. The earthward propagating plasmoid and flux ropes could have influence upon the dipolarization and injection in inner magnetosphere. The Cluster observations of earthward propagating plasmoid and flux ropes can be interpreted as strong evidence for multiple X-lines. Our observations are consistent with that multiple plasmoids or flux ropes are formed repeatedly and ejected tailward in the course of geomagnetically active time.
Keywords :
Plasmoid , Flux rope , Magnetospheric substorm , Near-tail regions , Cluster observations
Journal title :
Advances in Space Research
Serial Year :
2009
Link To Document :
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