scholarly journals Magnetotail dynamics at Mars: Initial MAVEN observations

2015 ◽  
Vol 42 (21) ◽  
pp. 8828-8837 ◽  
Author(s):  
Gina A. DiBraccio ◽  
Jared. R. Espley ◽  
Jacob R. Gruesbeck ◽  
John E. P. Connerney ◽  
David A. Brain ◽  
...  
Keyword(s):  
Magnetotail Dynamics

What is Cluster telling us about magnetotail dynamics?

2005 ◽  
Vol 36 (10) ◽  
pp. 1909-1915 ◽  
Author(s):  
Wolfgang Baumjohann ◽  
Rumi Nakamura
Keyword(s):  
Magnetotail Dynamics

scholarly journals Current sheet bending as destabilizing factor in magnetotail dynamics

2018 ◽  
Vol 25 (9) ◽  
pp. 092901 ◽  
Author(s):  
D. B. Korovinskiy ◽  
V. S. Semenov ◽  
N. V. Erkaev ◽  
I. B. Ivanov ◽  
S. A. Kiehas
Keyword(s):  
Current Sheet ◽  
Sheet Bending ◽  
Magnetotail Dynamics

scholarly journals Correlation between ground-based observations of substorm signatures and magnetotail dynamics

2005 ◽  
Vol 23 (3) ◽  
pp. 997-1011 ◽  
Author(s):  
E. Borälv ◽  
H. J. Opgenoorth ◽  
K. Kauristie ◽  
M. Lester ◽  
J.-M. Bosqued ◽  
...  
Keyword(s):  
Solar Wind ◽  
Event Study ◽  
Plasma Sheet ◽  
Sheet Thickness ◽  
Substorm Onset ◽  
Boundary Motion ◽  
Thickness Variations ◽  
Magnetotail Dynamics

Abstract. We present a substorm event study using the four Cluster spacecraft in combination with ground-based instruments, in order to perform simultaneous observations in the ionosphere and magnetotail. We show good correlation between substorm signatures on the ground and in the magnetotail, even though data from the northern-ground and southern-tail hemispheres are compared. During this event ground-based magnetometers show a substorm onset over Scandinavia in the pre-midnight sector. Within 1.5h the onset and three intensifications are apparent in the magnetograms. For all the substorm signatures seen on the ground, corresponding plasma sheet boundary motion is visible at Cluster, located at a downtail distance of 18.5 RE. As a result of the substorm onset and intensifications, Cluster moves in and out between the southern plasma sheet and lobe. Due to the lack of an apparent solar wind driver and the good correlation between substorm signatures on the ground, we conclude the substorm itself is the driver for these plasma sheet dynamics. We show that in the scales of Cluster inter-spacecraft distances (~0.5 RE) the inferred plasma sheet motion is often directed in both Ygsm- and Zgsm-directions, and discuss this finding in the context of previous studies of tail flapping and plasma sheet thickness variations.

MHD simulations of magnetotail dynamics

1996 ◽  
Vol 101 (A6) ◽  
pp. 12939-12954 ◽  
Author(s):  
Joachim Birn ◽  
Michael Hesse ◽  
Karl Schindler
Keyword(s):  
Mhd Simulations ◽  
Magnetotail Dynamics

scholarly journals Dynamics of Variable Dusk-Dawn Flow Associated with Magnetotail Current Sheet Flapping

2021 ◽  
Author(s):  
James Henry Lane ◽  
Adrian Grocott ◽  
Nathan Anthony Case ◽  
Maria-Theresia Walach
Keyword(s):  
Magnetic Field ◽  
Current Sheet ◽  
Field Data ◽  
Large Scale ◽  
Magnetic Field Data ◽  
Analysis Technique ◽  
Upstream Solar Wind ◽  
Magnetotail Dynamics ◽  
Magnetotail Current Sheet

Abstract. Previous observations have provided a clear indication that the dusk-dawn (v⊥y) sense of both slow (< 200 km s−1) and fast (> 200 km s−1) convective magnetotail flows is strongly governed by the Interplanetary Magnetic Field (IMF) By conditions. The related “untwisting hypothesis” of magnetotail dynamics is commonly invoked to explain this dependence, in terms of a large-scale magnetospheric asymmetry. In the current study, we present Cluster spacecraft observations from 12 October 2006 of earthward convective magnetotail plasma flows whose dusk-dawn sense disagrees with the untwisting hypothesis of IMF By control of the magnetotail flows. During this interval, observations of the upstream solar wind conditions from OMNI, and ionospheric convection data using SuperDARN, indicate a large-scale magnetospheric morphology consistent with positive IMF By penetration into the magnetotail. Inspection of the in-situ Cluster magnetic field data reveals a flapping of the magnetotail current sheet; a phenomenon known to influence dusk-dawn flow. Results from the curlometer analysis technique suggest that the dusk-dawn flow perturbations may have been driven by the J x B force associated with a dawnward-propagating flapping of the magnetotail current sheet, locally overriding the expected IMF By control of the flows. We conclude that invocation of the untwisting hypothesis may be inappropriate when interpreting intervals of dynamic magnetotail behaviour such as during current sheet flapping.

scholarly journals Role of entropy in magnetotail dynamics

2009 ◽  
Vol 114 (A9) ◽  
pp. n/a-n/a ◽  
Author(s):  
J. Birn ◽  
M. Hesse ◽  
K. Schindler ◽  
S. Zaharia
Keyword(s):  
Magnetotail Dynamics
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