scholarly journals Dependence of the IMF sector structure on the solar dipole tilt angle

2008 ◽  
Vol 113 (A7) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. M. Du ◽  
W. Y. Xu ◽  
X. S. Feng
Keyword(s):  
Tilt Angle ◽  
Sector Structure ◽  
Dipole Tilt ◽  
The Imf

Dipole tilt angle effect on magnetic reconnection locations on the magnetopause

2015 ◽  
Vol 120 (7) ◽  
pp. 5344-5354 ◽  
Author(s):  
C. B. Zhu ◽  
H. Zhang ◽  
Y. S. Ge ◽  
Z. Y. Pu ◽  
W. L. Liu ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Tilt Angle ◽  
Angle Effect ◽  
Dipole Tilt

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 Substorm onset location and dipole tilt angle

2006 ◽  
Vol 24 (2) ◽  
pp. 577-588 ◽  
Author(s):  
J. Wanliss
Keyword(s):  
Magnetic Field ◽  
Tilt Angle ◽  
Source Region ◽  
Radial Distance ◽  
Substorm Onset ◽  
Magnetospheric Substorms ◽  
Data Set ◽  
Current Disruption ◽  
Onset Location ◽  
Dipole Tilt

Abstract. From an initial data set of over 200 substorms we have studied a subset of 30 magnetospheric substorms close to magnetic midnight to investigate, in a statistical fashion, the source region of the auroral arc that brightens at the onset of expansive phase. This arc is usually identified as the ionospheric signature of the expansive phase onset that occurs in the magnetotail. All the substorm onsets were identified via ground-based magnetometer and photometer data from the CANOPUS array. Various Tsyganenko global magnetic field models were used to map magnetic field lines from the location of the onset arc out to its greatest radial distance in the magnetotail. The results appear to favour the current disruption model of substorms since the average onset location has an average of 14.1 Earth radii (RE) and is therefore more consistent with theories that place the onset location in the inner magnetotail. For the narrow range of tilts available our modeling indicates the parameter that appears to strongly influence the location of the substorm onset is the dipole tilt angle; as tilt becomes less negative onsets occur further downtail.

The dipole tilt angle dependence of the bow shock for southward IMF: MHD results

2015 ◽  
Vol 106 ◽  
pp. 99-107 ◽  
Author(s):  
M. Wang ◽  
J.Y. Lu ◽  
H.Z. Yuan ◽  
K. Kabin ◽  
Z.-Q. Liu ◽  
...  
Keyword(s):  
Tilt Angle ◽  
Bow Shock ◽  
Angle Dependence ◽  
Dipole Tilt

The IMF sector structure effects in total ozone in central Europe

1989 ◽  
Vol 33 (2) ◽  
pp. 198-205 ◽  
Author(s):  
Jürgen Bremer ◽  
Jan Laštovička ◽  
L. Křivský
Keyword(s):  
Central Europe ◽  
Total Ozone ◽  
Sector Structure ◽  
The Imf

The aurora at quiet magnetospheric conditions: Repeatability and dipole tilt angle dependence

1993 ◽  
Vol 98 (A3) ◽  
pp. 3789-3797 ◽  
Author(s):  
I. Oznovich ◽  
R. W. Eastes ◽  
R. E. Huffman ◽  
M. Tur ◽  
I. Glaser
Keyword(s):  
Tilt Angle ◽  
Angle Dependence ◽  
Dipole Tilt

scholarly journals Inter-hemispheric asymmetry of dependence of the cusp location on dipole tilt during northward IMF conditions

2012 ◽  
Vol 30 (1) ◽  
pp. 21-26 ◽  
Author(s):  
J. Shi ◽  
J. Guo ◽  
M. Dunlop ◽  
T. Zhang ◽  
Z. Liu ◽  
...  
Keyword(s):  
Tilt Angle ◽  
Hemispheric Asymmetry ◽  
Hemispheric Difference ◽  
Data Set ◽  
Angle Dependence ◽  
Angle Effect ◽  
The Mean ◽  
Different Altitudes ◽  
Dipole Tilt

Abstract. A data set of the Cluster cusp crossings over a 5-year period is studied for the interhemispheric comparison of the dipole tilt angle effect on the latitude of the mid-altitude cusp. The result shows that the dipole tilt angle has a clear control of the cusp latitudinal location. Although, the northern cusp moves 0.054° ILAT for every 1° increase in the dipole tilt angle at the mean altitude of 5.2 RE, the southern cusp moves 0.051° ILAT for every 1° increase in the dipole tilt angle at the mean altitude of 6.6 RE. The northern cusp dependence agrees with the trend formed by other observations of different satellites for different altitudes, whereas the southern cusp does not. We therefore suggest that there is an inter-hemispheric difference in the dipole tilt angle dependence of cusp, latitudinal location, which has an impact on other observations of different satellites in different altitudes.

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