Results 41 to 50 of about 5,979 (206)

Morning–Afternoon Asymmetry in Correlations Between the Equatorial Electrojet and Sq Westward Currents on Polar‐Side of the Focus

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Equatorial electrojet (EEJ) and solar quiet (Sq) currents with one vortex each in either hemisphere are key components of the ionospheric dynamo currents, driving geomagnetic diurnal variations observed at Earth's surface. However, the physical coupling between EEJ and Sq westward currents on the polar side of the vortex focus remains poorly ...
Xiaocan Liu, Peng Han, Katsumi Hattori, Huaran Chen   +3 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

Dawn‐Side Anomaly in Sudden Geomagnetic Field Responses to Solar Wind Pressure Discontinuities During the 10 May and 10 October 2024 Geomagnetic Storms

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Interactions of solar wind dynamic pressure (SWDP) discontinuities with Earth's magnetosphere cause geomagnetic Sudden Commencements (SCs). Typically, positive/negative SCs occur at low latitudes due to enhancements/reductions in SWDP.
Deeksha Rai, S. Tulasi Ram, B. Nilam, D. M. Oliveira, B. Remya, Anil Raghav, D. Chakrabarty, Abhishek Kumar, Shivam Parashar, Vipin K. Yadav, A. P. Dimri   +10 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

On the Possibility of Driving the Electron Flux Probabilistic Models by the AE Index

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract We present the new probabilistic model of the electron fluxes designed to assess the risks of the spacecraft surface charging for missions with near‐equatorial orbits in the inner magnetosphere. It is a second model developed within a frame of the European Space Agency's activity “Plasma Environment Modeling in the Earth's Magnetosphere ...
S. Dubyagin, N. Ganushkina, A. Sicard, J.‐C. Matéo‐Vélez, L. Monnin, D. Heynderickx, P. Jiggens, G. Deprez, F. Cipriani   +8 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

Assessing Magnetic Fluctuations Effects in the South American Sector in Relation to Global Variations Using Ksa Index, Kp Index, and Hybrid Formats During Quiet Times Across the Seasons of the 2020 Solar Minimum

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract Geomagnetic indices can be used to quantify variations in geomagnetic activity caused by Sun‐Earth interactions across the magnetosphere and ionosphere. The global Kp index is widely used as a global geomagnetic indicator, but it is based mostly on the Northern Hemisphere with no contributions from South American observatories.
L. M. Guizelli, C. M. Denardini, J. Moro, L. C. A. Resende, S. S. Chen, P. K. Nyassor   +5 more
wiley   +1 more source

Austral electrojet indices derived for the great storm of March 1989 1177

Annals of Geophysics, 1996
Available magnetic records from eight stations in the Antarctica, for the March 1989 geomagnetic storm, are used to construct the southern hemisphere auroral indices, analogous to the boreal ones.
M. M. Zossi de Artigas, V. M. Silbergleit, J. R. Manzano   +2 more
doaj   +1 more source