Results 91 to 100 of about 4,774 (237)

Large‐Scale Traveling Ionospheric Disturbances Over the Asian‐Pacific Sector During 10–11 May 2024 Geomagnetic Superstorm: Ionosonde Observation and MAGE Simulation

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The large‐scale traveling ionospheric disturbances (LSTIDs) over the Asian‐Pacific sector during the 10–11 May 2024 superstorm are investigated using ionosonde observation and simulation from a whole geospace model—Multiscale Atmosphere Geospace Environment (MAGE), which fully couples multiple magnetosphere, ionosphere and thermosphere models.
Tianyang Hu, Wenbin Wang, Kevin H. Pham, Haonan Wu, Liying Qian, Quan Gan, Nicholas M. Pedatella   +6 more
wiley   +1 more source

Dayside and nightside reconnection rates inferred from IMAGE FUV and Super Dual Auroral Radar Network data [PDF]

, 2006
peer reviewedThe spectrographic imager at 121.8 nm ( SI12) of the far ultraviolet ( FUV) experiment onboard the IMAGE spacecraft produces global images of the Doppler- shifted Lyman alpha emission of the proton aurora.
Hubert, Benoît, Hubert, B., Cowley, S. W. H., Blockx, C., Milan, S. E., Gérard, Jean-Claude, Blockx, Caroline, Gérard, J.-c., Grocott, A.   +8 more
core   +1 more source

Instability of the magnetosphere-ionosphere convection and formation of auroral arcs [PDF]

Annales Geophysicae, 1994
In this paper we study an instability of the plasma moving towards the Earth near the inner plasma sheet boundary. We include both the interchange instability of the plasma sheet and the magnetosphere-ionosphere interaction instability caused by an ...
A. E. Kozlovsky, W. B. Lyatsky
doaj   +1 more source

Global Observational Comparison of Large‐Scale Traveling Atmospheric and Ionospheric Disturbances During the May 2024 Geomagnetic Storm

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract During the geomagnetic storm on 10 May 2024, neutral density measurements from 14 Tianmu, Swarm, and GRACE‐FO satellites at ∼510 km altitude, combined with total electron content (TEC) observations, enabled the first global observational comparison of large‐scale traveling atmospheric and ionospheric disturbances (LSTADs/TIDs) via snapshots ...
Xiaolong Wei, Guoying Jiang, Yajun Zhu, Yongping Li, Jiangzhao Ai, Tingwei Han, Huijun Le, Aibin Zhang, Jiyao Xu   +8 more
wiley   +1 more source

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 ...
Milan, S. E., Stolle, Claudia, H. Gleisner (7605608), V. Angelopoulos (7161083), Grocott, A., A. Grocott (7601519), C. Stolle (7605611), Angelopoulos, V., Stolle, C., O. Amm (7591346), J. M. Weygand (7605605), Weygand, J. M., Amm, O., S. E. Milan (7594526), Gleisner, H.   +14 more
core   +1 more source

Probing discrete auroral arcs by ionospheric tomography [PDF]

Annales Geophysicae, 1998
Optical observations of 557.7 nm and 630.0 nm emissions from discrete auroral arcs in the post-noon sector have been related to localised field-aligned enhancements in the spatial distribution of E- and F-layer electron density respectively seen in ...
J. Moen, S. T. Berry, L. Kersley, B. Lybekk   +3 more
doaj   +1 more source

Energy Dependence of Energetic Electron Precipitation Rates Near the Foot of Electron Isotropy Boundary

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract We report a rare quiet‐time observation by NOAA‐18 spacecraft flying nearly along the electron isotropy boundary (IBe). Complemented by data from four nearby meridional IBe crossings of other POES spacecraft, this case study provides a novel quantitative information concerning the regular energy dependence of the loss‐cone filling ratio (Jprec/
V. A. Sergeev, A. R. Dibaeva, N. A. Stepanov, A. V. Artemyev, R. M. Millan, A. Y. Ukhorskiy   +5 more
wiley   +1 more source

Field-aligned currents and ionospheric parameters deduced from EISCAT radar measurements in the post-midnight sector [PDF]

, 2002
International audienceAttempting to derive the field-aligned current (FAC) density using the EISCAT radar and to understand the role of the ionosphere on closing FACs, we conducted special radar experiments with the EISCAT radar on 9 October 1999.
Nagatsuma, T., Gjerloev, J. W., S. Nozawa, T. Nagatsuma, M. Sugino, S. C. Buchert, Nozawa, S., Fujii, R., Buchert, S. C., Kosch, M. J., M. J. Kosch, Sugino, M., R. Fujii, J. W. Gjerloev   +13 more
core   +1 more source

Ballooning‐Interchange Instability in the Near‐Earth Plasma Sheet and Auroral Beads: Global Magnetospheric Modeling at the Limit of the MHD Approximation

Geophysical Research Letters, 2020
Explosive magnetotail activity has long been understood in the context of its auroral manifestations. While global models have been used to interpret and understand many magnetospheric processes, the temporal and spatial scales of some auroral forms have
K. A. Sorathia, V. G. Merkin, E. V. Panov, B. Zhang, J. G. Lyon, J. Garretson, A. Y. Ukhorskiy, S. Ohtani, M. Sitnov, M. Wiltberger   +9 more
doaj   +1 more source

A substorm in midnight auroral precipitation [PDF]

Annales Geophysicae, 2003
DMSP F7 spacecraft observations for the whole of 1986 were used to construct the empirical model of the midnight auroral precipitation during a substorm.
V. G. Vorobjev, O. I. Yagodkina, G. V. Starkov, Ya. I. Feldstein   +3 more
doaj   +1 more source