scholarly journals Modulation of magnetospheric substorm frequency: Dipole tilt and IMF B y effects

2021 ◽  
Author(s):  
A. Ohma ◽  
J. P. Reistad ◽  
S. M. Hatch
Keyword(s):  
Magnetospheric Substorm ◽  
Dipole Tilt

scholarly journals Modulation of magnetospheric substorm frequency: Dipole tilt and IMF By effects

2020 ◽  
Author(s):  
Anders Ohma ◽  
Jone Peter Reistad ◽  
Spencer Mark Hatch
Keyword(s):  
Magnetospheric Substorm ◽  
Dipole Tilt

scholarly journals Modulation of magnetospheric substorm frequency: Dipole tilt and IMF By effects

2020 ◽  
Author(s):  
Anders Ohma ◽  
Jone Peter Reistad ◽  
Spencer Mark Hatch
Keyword(s):  
Magnetospheric Substorm ◽  
Dipole Tilt

scholarly journals Modulation of magnetospheric substorm frequency: Dipole tilt and IMF Bᵧ effects

2020 ◽  
Author(s):  
Anders Ohma ◽  
Jone Peter Reistad ◽  
Spencer Mark Hatch
Keyword(s):  
Magnetospheric Substorm ◽  
Dipole Tilt

scholarly journals Common solar wind drivers behind magnetic storm–magnetospheric substorm dependency

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Jakob Runge ◽  
Georgios Balasis ◽  
Ioannis A. Daglis ◽  
Constantinos Papadimitriou ◽  
Reik V. Donner
Keyword(s):  
Solar Wind ◽  
Magnetic Storm ◽  
Magnetospheric Substorm

scholarly journals Cusp-like plasma in high altitudes: a statistical study of the width and location of the cusp from Magion-4

2002 ◽  
Vol 20 (3) ◽  
pp. 311-320 ◽  
Author(s):  
J. Mĕrka ◽  
J. Šafránková ◽  
Z. Nĕmeček
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
High Altitudes ◽  
Data Set ◽  
Latitudinal Dependence ◽  
Merging Process ◽  
Low Altitude ◽  
Field Lines ◽  
The Magnetic Field ◽  
Dipole Tilt

Abstract. The width of the cusp region is an indicator of the strength of the merging process and the degree of opening of the magnetosphere. During three years, the Magion-4 satellite, as part of the Interball project, has collected a unique data set of cusp-like plasma observations in middle and high altitudes. For a comparison of high- and low-altitude cusp determination, we map our observations of cusp-like plasma along the magnetic field lines down to the Earth’s surface. We use the Tsyganenko and Stern 1996 model of the magnetospheric magnetic field for the mapping, taking actual solar wind and IMF parameters from the Wind observations. The footprint positions show substantial latitudinal dependence on the dipole tilt angle. We fit this dependence with a linear function and subtract this function from observed cusp position. This process allows us to study both statistical width and location of the inspected region as a function of the solar wind and IMF parameters. Our processing of the Magion-4 measurements shows that high-altitude regions occupied by the cusp-like plasma (cusp and cleft) are projected onto a much broader area (in magnetic local time as well as in a latitude) than that determined in low altitudes. The trends of the shift of the cusp position with changes in the IMF direction established by low-altitude observations have been confirmed.Key words. Magnetospheric physics (magnetopause, cusp and boundary layer; solar wind – magnetosphere interactions)

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>

Sign in / Sign up

Export Citation Format

Share Document