Results 41 to 50 of about 6,013 (205)

Dayside and nightside contributions to cross-polar cap potential variations: the 20 March 2001 ICME case [PDF]

Annales Geophysicae, 2011
We investigate the association between temporal-spatial structure of polar cap convection and auroral electrojet intensifications during a 5-h-long interval of strong forcing of the magnetosphere by an ICME/Magnetic cloud on 20 March 2001. We use data
Y. L. Andalsvik, P. E. Sandholt, C. J. Farrugia   +2 more
doaj   +1 more source

An Ensemble Multivariate Multiscale Framework for Prediction of Long‐Term Solar Activity With Nonstationary Oscillations

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract Solar activity is usually characterized by different indices from different perspectives, which are commonly interconnected and contain nonstationary oscillations (NSOs). Given the significant influence of solar activity on space weather, the Earth and humans, it is of great significance to predict solar activity for better understanding not ...
Shan Jiang, Zu‐Guo Yu, Vo Van Anh, Taesam Lee, Yu Zhou   +4 more
wiley   +1 more source

Auroral electrojet dynamics during magnetic storms, connection with plasma precipitation and large-scale structure of the magnetospheric magnetic field [PDF]

Annales Geophysicae, 1999
Effect of the equatorward shift of the eastward and westward electrojets during magnetic storms main phase is analyzed based on the meridional chains of magnetic observatories EISCAT and IMAGE and several Russian observatories (geomagnetic longitude ...
Y. I. Feldstein, L. I. Gromova, A. Grafe, C.-I. Meng, V. V. Kalegaev, I. I. Alexeev, Y. P. Sumaruk   +6 more
doaj   +1 more source

Universal Time Influence on Stormtime Magnetosphere Ionosphere Coupling

AGU Advances, Volume 7, Issue 2, April 2026.
Abstract The offset between Earth's magnetic and rotational axes introduces a diurnal dependence in the high‐latitude EUV exposure of the northern hemisphere (NH) and southern hemisphere (SH). This variation raises the question: Does the Universal Time (UT) of geomagnetic storm onset impact its geospace consequences?
Kalpesh Ghag, William Lotko, Kevin Pham, Dong Lin, Viacheslav Merkin, Anil Raghav, Michael Wiltberger   +6 more
wiley   +1 more source

Global characteristics of auroral Hall currents derived from the Swarm constellation: dependences on season and IMF orientation [PDF]

Annales Geophysicae, 2017
On the basis of field-aligned currents (FACs) and Hall currents derived from high-resolution magnetic field data of the Swarm constellation, the average characteristics of these two current systems in the auroral regions are comprehensively ...
T. Huang, T. Huang, H. Lühr, H. Wang
doaj   +1 more source

A New Global Climatological Model of the Equatorial Ionospheric Vertical E × B Drift: Integrating Ground‐Based Magnetometer, Radar, and Satellite Data Sets

Earth and Space Science, Volume 13, Issue 4, April 2026.
Abstract We present a new empirical vertical E×B $\mathbf{E}\times \mathbf{B}$ drift model developed using ground‐based magnetometer, radar, and satellite data over equatorial latitude regions. We first implement an algorithm relating magnetometer derived equatorial electrojet (EEJ) and vertical ion plasma drift (equivalent to vertical E×B $\mathbf{E ...
John Bosco Habarulema, Daniel Okoh, Endawoke Yizengaw, Valence Habyarimana, Michael Pezzopane, Paulo Roberto Fagundes, Zama Katamzi‐Joseph, Mark B. Moldwin, Claudio Cesaroni, Danny Scipion   +9 more
wiley   +1 more source

A Comparison of Auroral Oval Proxies With the Boundaries of the Auroral Electrojets

Space Weather
The boundaries of the auroral oval and auroral electrojets are an important source of information for understanding the coupling between the solar wind and the near‐earth plasma environment.
Simon James Walker, Karl Magnus Laundal, Jone Peter Reistad, Anders Ohma, Spencer Mark Hatch, Gareth Chisham, Margot Decotte   +6 more
doaj   +1 more source

Magnetic Field Measurement by a Rocket

Antarctic Record, 1975
The S-210JA-7 sounding rocket was launched from Syowa Station, Antarctica to measure the magnetic field of the electrojet current at 0023 local time on December 14, 1972.
Fumio TOHYAMA, Iwao AOYAMA, Yoshio KATO
doaj   +1 more source

How Energy Enters the Magnetosphere During a Substorm: A Perspective After 60 Years of Working in the Field

Perspectives of Earth and Space Scientists, 2022
This paper begins with a summary of my path into space physics and the following four decades of active research in ionosphere and magnetosphere. The following perspective part addresses the main subject in four steps, from flow braking and diversions ...
Gerhard Haerendel
doaj   +1 more source

Imprint of the Quasi‐Biennial Oscillation on the Ionosphere and Thermosphere

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract The Quasi‐Biennial Oscillation (QBO) is a dominant mode of stratospheric variability and is known to modulate the variability of the ionosphere‐thermosphere (IT) system. However, the extent of its influence on the ionosphere‐thermosphere system remains uncertain due to weak signals and confounding with similar periodicities in solar flux.
D. Singh, L. P. Goncharenko, S. R. Zhang
wiley   +1 more source