Results 41 to 50 of about 334,315 (204)

Comparison between SuperDARN flow vectors and equivalent ionospheric currents from ground magnetometer arrays [PDF]

, 2012
Equivalent ionospheric currents obtained with the spherical elementary current systems (SECS) method and derived from nearly 100 ground magnetometers spread over North America and Greenland are compared with ionospheric flow vectors measured by the ...
Angelopoulos, V., Stolle, C., Milan, S. E., Weygand, J. M., Amm, O., Grocott, A., Gleisner, H.   +6 more
core   +4 more sources

Magnetospheric and ionospheric vortices response to negative solar wind dynamic pressure pulse

Frontiers in Astronomy and Space Sciences
In this work, we present two individual cases showing that a negative solar wind dynamic pressure pulse can lead to magnetospheric decompression and generate a clockwise vortex in the duskside magnetosphere.
Huayu Zhao, Huayu Zhao, Huigen Yang, Zejun Hu, Dehong Huang, Bin Li, Beichen Zhang, Jianjun Liu   +7 more
doaj   +1 more source

Auroral turbulence of the ionospheric convection [PDF]

Vestnik MGTU, 2016
The formation of the two-dimensional auroral structures in the cold ionospheric-magnetospheric plasma under convection has been considered. The convection inhomogeneity leads to appearance of the currents across and along the magnetic field lines.
Volkov М. А.
doaj   +1 more source

Magnetospheric signatures of ionospheric density cavities observed by Cluster [PDF]

, 2015
AJBR ackowledges support from STFC under consolidated grant ST/K000993/1.We present Cluster measurements of large amplitude electric fields corre- lated with intense downward field-aligned currents, observed during a nightside crossing of the auroral ...
Wright, A. N., Karlsson, Tomas, A. J. B. Russell, A. N. Wright, T. Karlsson, Wright, Andrew Nicholas, Russell, A. J. B., Karlsson, T., Russell, Alexander John Barkway, Karlsson, Tomas,, Russell, Alexander John Barkway; id_orcid, Wright, Andrew Nicholas; id_orcid   +11 more
core   +1 more source

Nightside Auroral Arcs Near the Electron Isotropy Boundary: TRACERS–THEMIS–MetOp Observations

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract Particle precipitation is the ultimate driver of aurorae. Monoenergetic (∼keV) electrons accelerated above the ionosphere produce discrete auroral forms and are associated with field‐aligned currents that govern magnetosphere–ionosphere (MI) coupling.
S. R. Kamaletdinov, A. V. Artemyev, X.‐J. Zhang, J. S. Halekas, S. Henderson, V. Angelopoulos   +5 more
wiley   +1 more source

Current systems in the Jovian magnetosphere [PDF]

Journal of Geophysical Research: Space Physics, 2008
The plasma dynamics in the Jovian magnetosphere is characterized by rapid rotation of the planet. In this paper, a new magnetohydrodynamic (MHD) simulation scheme is developed to precisely calculate the current systems in the Jovian magnetosphere and to relate them with the plasma dynamics. A field‐aligned current (FAC) pattern that is expected for the
Tadanori Moriguchi, Aoi Nakamizo, Takashi Tanaka, Takahiro Obara, Hironori Shimazu   +4 more
openaire   +1 more source

The six-month line in geomagnetic long series [PDF]

Annales Geophysicae, 2004
Daily means of the horizontal components X (north) and Y (east) of the geomagnetic field are available in the form of long series (several tens of years). Nine observatories are used in the present study, whose series are among the longest.
J. L. Le Mouël, E. Blanter, M. Shnirman
doaj   +1 more source

Persistence and Dynamics of an Sq‐like Mid‐Latitude Current Vortex During the May 2024 Superstorm

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract The solar quiet (Sq) current system describes the mid‐latitude equivalent current under quiet geomagnetic conditions, but whether an Sq‐like vortex persists during intense storms remains unclear. Using dense East Asian magnetometer observations, including the Chinese Meridian Project, we reconstruct the storm‐time ionospheric equivalent ...
Fengjue Wang, Chao Xiong, Yunliang Zhou, Yixun Zhu, Yuyang Huang, Baohua Sun, Bohao Qian, Simin Wang, LinLin Li, Shuji Abe, Akimasa Yoshikawa   +10 more
wiley   +1 more source

April 2000 geomagnetic storm: Ionospheric drivers of large geomagnetically induced currents [PDF]

, 2003
International audienceGeomagnetically induced currents (GIC) flowing in technological systems on the ground are a direct manifestation of space weather. Due to the proximity of very dynamic ionospheric current systems, GIC are of special interest at high
Thomson, A., A. Thomson, A. Pulkkinen, E. Clarke, Pulkkinen, A., Clarke, E., A. McKay, McKay, A.   +7 more
core   +2 more sources

Characterizing the magnetic signal generated in the magnetosphere from 1996 to 2024 using ground geomagnetic data

Earth, Planets and Space
The geomagnetic field, as observed at the Earth’s surface or LEO satellite altitudes (between 300 km and 800 km), is the combination of signals generated by various internal and external sources. The internal sources are mainly associated with the liquid
Yalei Shi, Vincent Lesur, Erwan Thébault   +2 more
doaj   +1 more source