Multipoint Analysis of the Temporal Scale of Bursty Bulk Flow Events during the Quiet Time of Magnetotail

2005 ◽  
Vol 48 (2) ◽  
pp. 277-283 ◽  
Author(s):  
Yu-Duan MA ◽  
Jin-Bin CAO ◽  
Guo-Cheng ZHOU ◽  
Zhen-Xin LIU ◽  
H. Reme ◽  
...  

1996 ◽  
Vol 101 (A3) ◽  
pp. 4967-4989 ◽  
Author(s):  
V. Angelopoulos ◽  
F. V. Coroniti ◽  
C. F. Kennel ◽  
M. G. Kivelson ◽  
R. J. Walker ◽  
...  


1997 ◽  
Vol 102 (A1) ◽  
pp. 211-212 ◽  
Author(s):  
V. Angelopoulos ◽  
F. V. Coroniti ◽  
C. F. Kennel ◽  
M. G. Kivelson ◽  
R. J. Walker ◽  
...  


2010 ◽  
Vol 115 (A5) ◽  
pp. n/a-n/a ◽  
Author(s):  
E. V. Panov ◽  
R. Nakamura ◽  
W. Baumjohann ◽  
V. A. Sergeev ◽  
A. A. Petrukovich ◽  
...  


2019 ◽  
Vol 872 (2) ◽  
pp. L26 ◽  
Author(s):  
M. Zhou ◽  
J. Huang ◽  
H. Y. Man ◽  
X. H. Deng ◽  
Z. H. Zhong ◽  
...  


2020 ◽  
Author(s):  
Zhi-Yang Liu ◽  
Qiu-Gang Zong ◽  
Hong Zou

<p>Drifting electron holes (DEHs), manifesting as sudden but mild dropout in electron flux, are a common phenomenon seen in the Earth's magnetosphere. It manifests the change of the state of the magnetosphere. However, previous studies primarily focus on DEHs during geomagnetically active time (e.g., substorm). Not until recently have quiet time DEHs been reported. In this paper, we present a systematic study on the quiet time DEHs. BeiDa Imaging Electron Spectrometer (BD-IES) measurements from 2015 to 2017 are investigated. Twenty-two DEH events are identified. The DEHs cover the whole energy range of BD-IES (50–600 keV). Generally, the DEHs are positively dispersive with respect to energy. Time-of-flight analysis suggests the dispersion results from electron drift motion and gives the location where the DEHs originated from. Statistics reveal the DEHs primarily originated from the postmidnight magnetosphere. In addition, superposed epoch analysis applied to geomagnetic indices and solar wind parameters indicates these DEH events occurred during geomagnetically quiet time. No storm or substorm activity could be identified. However, an investigation into nightside midlatitude ground magnetic records suggests these quiet time DEHs were accompanied by Pi2 pulsations. The DEH-Pi2 connection indicates a possible DEH-bursty bulk flow (BBF) connection, since nightside midlatitude Pi2 activity is generally attributed to magnetotail BBFs. This connection is also supported by a case study of coordinated magnetotail observations from Magnetospheric Multiscale spacecraft. Therefore, we suggest the quiet time DEHs could be caused by magnetotail BBFs, similar to the substorm time DEHs.</p>



2014 ◽  
Vol 119 (12) ◽  
pp. 9952-9961 ◽  
Author(s):  
Rongsheng Wang ◽  
Quanming Lu ◽  
Aimin Du ◽  
Rumi Nakamura ◽  
San Lu ◽  
...  


2007 ◽  
Vol 25 (6) ◽  
pp. 1405-1415 ◽  
Author(s):  
K. Snekvik ◽  
S. Haaland ◽  
N. Østgaard ◽  
H. Hasegawa ◽  
R. Nakamura ◽  
...  

Abstract. This article describes observations of a bursty bulk flow (BBF) in the outer central plasma sheet. The observations are made with the Cluster satellites, located approximately 19 RE downtail, close to the midnight sector in the Southern Hemisphere. 40–60 s after Cluster first detected the BBF, there was a large bipolar perturbation in the magnetic field. A Grad-Shafranov reconstruction has revealed that this is created by a field-aligned current at the flank of the BBF. Further analysis of the plasma moments has shown that the BBF has the properties of a depleted flux tube. Depleted flux tubes are an important theoretical model for how plasma and magnetic flux can be transported Earthward in the magnetotail as part of the Dungey cycle. The field aligned current is directed Earthward and is located at the dawn side of the BBF. Thus, it is consistent with the magnetic shear at the flank of an Earthward moving BBF. The total current has been estimated to be about 0.1 MA.



2020 ◽  
Vol 125 (10) ◽  
Author(s):  
L. Q. Zhang ◽  
A. T. Y. Lui ◽  
W. Baumjohann ◽  
Chi Wang ◽  
James L. Burch ◽  
...  


2000 ◽  
Vol 27 (13) ◽  
pp. 1847-1850 ◽  
Author(s):  
Li-Jen Chen ◽  
G. K. Parks ◽  
M. McCarthy ◽  
D. Larson ◽  
R. P. Lin


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