Interplanetary magnetic field control of the location of substorm onset and auroral features in the conjugate hemispheres

2004 ◽  
Vol 109 (A7) ◽  
Author(s):  
N. Østgaard
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Substorm Onset ◽  
Field Control

Parameters controlling the substorm onset location

2021 ◽  
Author(s):  
Reham Elhawary ◽  
Karl Laundal ◽  
Jone Reistad ◽  
Anders Ohma ◽  
Spencer Hatch ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Tilt Angle ◽  
Linear Regression Analysis ◽  
Substorm Onset ◽  
Azimuthal Component ◽  
Field Orientation ◽  
Hall Conductance ◽  
Onset Location ◽  
Dipole Tilt

<p>Substorm onset location varies over a range of magnetic local time (MLT) and magnetic latitudes (MLat). It is well known that about 5% of the variation in onset MLT can be explained by variations in interplanetary magnetic field orientation and dipole tilt angle. Both parameters introduce an azimuthal component in the magnetic field in the magnetosphere such that the projection of the onset MLT in the ionosphere is shifted. The MLT of the onset near the magnetopsheric equatorial plane is even less predictable. Recent studies have suggested that gradients in the ionospheric Hall conductance lead to a duskward shift of tail dynamics, which could also influence the location of substorm onset. Our goal is to test these ideas by quantifying the dependence of the spatial variation of the onset location on external and internal conditions. We focus on the correlation between the substorm onset location with conditions prior to the onset, such as the interplanetary magnetic field By component, dipole tilt angle, and estimates of the Hall conductance. Linear regression analysis is used to determine the substorm onset location dependence on the proposed variables.</p>

scholarly journals Interplanetary magnetic field control of the ionospheric field-aligned current and convection distributions

2014 ◽  
Vol 119 (4) ◽  
pp. 3130-3149 ◽  
Author(s):  
L. Juusola ◽  
S. E. Milan ◽  
M. Lester ◽  
A. Grocott ◽  
S. M. Imber
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Field Control ◽  
Field Aligned Current

Interplanetary magnetic field control of high-latitude activity on July 29, 1977

1982 ◽  
Vol 87 (A8) ◽  
pp. 5963 ◽  
Author(s):  
L. J. Zanetti ◽  
T. A. Potemra ◽  
J. P. Doering ◽  
J. S. Lee ◽  
J. F. Fennell ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
High Latitude ◽  
Field Control

Interplanetary magnetic field control of heavy ion abundances at ∼ 5.2 AU

1996 ◽  
Vol 17 (4-5) ◽  
pp. 307-310
Author(s):  
L.J Lanzerotti ◽  
C.G Maclennan ◽  
R.J Forsyth
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Heavy Ion ◽  
Field Control

scholarly journals Interplanetary magnetic field control of dayside ion conics

2000 ◽  
Vol 105 (A10) ◽  
pp. 23339-23344 ◽  
Author(s):  
W. Miyake ◽  
T. Mukai ◽  
N. Kaya
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Field Control ◽  
Ion Conics

Interhemispherical asymmetry of substorm onset locations and the interplanetary magnetic field

2011 ◽  
Vol 38 (8) ◽  
pp. n/a-n/a ◽  
Author(s):  
N. Østgaard ◽  
K. M. Laundal ◽  
L. Juusola ◽  
A. Åsnes ◽  
S. E. Håland ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Substorm Onset

Spontaneous substorm onset during a prolonged period of steady, southward interplanetary magnetic field

1996 ◽  
Vol 101 (A11) ◽  
pp. 24583-24598 ◽  
Author(s):  
V. Angelopoulos ◽  
V. A. Sergeev ◽  
F. S. Mozer ◽  
K. Tsuruda ◽  
S. Kokubun ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Substorm Onset
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