Results 51 to 60 of about 128 (95)

Video1_Direct Connection Between Auroral Oval Streamers/Flow Channels and Equatorward Traveling Ionospheric Disturbances.MP4

, 2021
We use simultaneous auroral imaging, radar flows, and total electron content (TEC) measurements over Alaska to examine whether there is a direct connection of large-scale traveling ionospheric disturbances (LSTIDs) to auroral streamers and associated ...
Shunrong Zhang (9942500), Roger H. Varney (11589109), Yukitoshi Nishimura (3400205), Anthea Coster (9942502), Don L. Hampton (11589112), Jiang Liu (197069), William A. Bristow (4963024), Ashton S. Reimer (7016267), Larry R. Lyons (11546926)   +8 more
core   +1 more source

An Extreme Events Study of the Storm‐Time Variations in Satellite Drag Coefficients

Space Weather, Volume 23, Issue 12, December 2025.
Abstract This study examines storm‐time variations in the drag coefficients CD $\left({C}_{D}\right)$ of the GRACE and GRACE Follow‐On (FO) satellites during selected extreme geomagnetic storms—the October 2003, November 2003, November 2004, and May 2024 storms.
Soumyajit Dey, Phillip C. Anderson, Marcin D. Pilinski, Eric K. Sutton, Aaron L. Bukowski   +4 more
wiley   +1 more source

Video2_Direct Connection Between Auroral Oval Streamers/Flow Channels and Equatorward Traveling Ionospheric Disturbances.MP4

, 2021
We use simultaneous auroral imaging, radar flows, and total electron content (TEC) measurements over Alaska to examine whether there is a direct connection of large-scale traveling ionospheric disturbances (LSTIDs) to auroral streamers and associated ...
Shunrong Zhang (9942500), Roger H. Varney (11589109), Yukitoshi Nishimura (3400205), Anthea Coster (9942502), Don L. Hampton (11589112), Jiang Liu (197069), William A. Bristow (4963024), Ashton S. Reimer (7016267), Larry R. Lyons (11546926)   +8 more
core   +1 more source

Characteristics of Large‐Scale Traveling Ionospheric Disturbances During the 10 May 2024 Geomagnetic Storm

Space Weather, Volume 23, Issue 10, October 2025.
Abstract Based on the total electron content (TEC) observation in the Asian‐Australian and American sectors, this paper investigates the characteristics and hemispheric asymmetry of large‐scale traveling ionospheric disturbances (LSTIDs) during the 10 May 2024 superstorm. We found that the amplitudes and meridional phase velocities of LSTIDs in the two
Tingwei Han, Huijun Le, Yuyan Yang, Wenbo Li, Wenjie Sun, Han Ma, Yijia Zhou, Bowei Liu, Rongjin Du, Libo Liu, Yiding Chen, Ruilong Zhang   +11 more
wiley   +1 more source

Effects of the October 2024 Storm over the Global Ionosphere

Remote Sensing
The present study analyzes the global ionospheric response to the intense geomagnetic storm of 10–11 October 2024 (SYM—H minimum of −346 nT), using observations from COSMIC—2 and Swarm satellites, GNSS TEC, and Digisondes.
Krishnendu Sekhar Paul, Haris Haralambous, Mefe Moses, Sharad C. Tripathi   +3 more
doaj   +1 more source

Multiple‐Event Study of Substorm Electric Field Penetration Into Middle Latitudes Based on Simultaneous Observation of 630‐nm Airglow Enhancements at Three Stations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract It is known that convection electric fields develop in the polar region associated with substorm onset, and a westward electric field penetrates to lower latitudes on the night side. Two‐dimensional observations of 630‐nm airglow enhancements associated with the westward electric field can be conducted using all‐sky cameras at middle latitudes.
S. Morita, K. Shiokawa, Y. Otsuka, N. Nshitani, A. Shinbori, A. Fujimoto, A. Yoshikawa, M. Nishioka, S. Perwitasari, M. Yamamoto, T. Sori   +10 more
wiley   +1 more source

Detection of the ionospheric disturbances on GPS-TEC using Differential Rate Of TEC (DROT) algorithm

, 2020
The solar, geomagnetic, gravitational and seismic activities can cause spatial and temporal (hourly, diurnal, seasonal and annual) variabilities of the ionosphere. Main observable ionospheric parameters such as Total Electron Content (TEC) can be used to
Karatay, Secil
core   +1 more source

Long-Term Observation of the Quasi-3-Hour Large-Scale Traveling Ionospheric Disturbances by the Oblique-Incidence Ionosonde Network in North China. [PDF]

Sensors (Basel), 2021
Zhang R, Chen G, Li Y, Zhang S, Gong W, He Z, Zhang M.   +6 more
europepmc   +1 more source

Large-Scale Traveling Atmospheric and Ionospheric Disturbances Observed in GUVI With Multi-Instrument Validations. [PDF]

Geophys Res Lett, 2022
Bossert K, Paxton LJ, Matsuo T, Goncharenko L, Kumari K, Conde M.   +5 more
europepmc   +1 more source

Universal time effect in the occurrences of large-scale ionospheric disturbances

, 1992
The auroral storm-related enhancements in the virtual height (Δh′F) of the F-region were analysed for a period of 3 years (1980-1982), using hourly ionosonde data from six sub-auroral stations positioned in a geographic longitude range 4-284°E. The night-
Hajkowicz L.A.
core   +1 more source