Results 61 to 70 of about 47,066 (211)

Nighttime Westward Equatorial Electrojet Observed During the January 2026 Geomagnetic Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract The equatorial electrojet (EEJ) is a narrow band of zonal electric current flowing in the E‐region ionosphere within approximately ±2° $\pm 2{}^{\circ}$ latitude of the magnetic equator. At night, the EEJ is generally considered very weak because of low ionospheric conductivity.
Y. Yamazaki, M. V. da Silva, J. Matzka, G. B. Soares, A. Grayver, D. R. Themens, S. K. Das, C. Stolle, A. Maute, S. Perwitasari, M. Nishioka, R. Kaewthongrach, S. Channumsin, Y. Setiawan, M. Syirojudin, X. Yue, A. Yoshikawa, S. Abe, K. Girgis, R. Flores, F. Justo, J. Inostroza, G. Vichare, G. Seemala, A. Nel, N. M. Giday, A. Samy   +26 more
wiley   +1 more source

Statistical distribution of IEC at midlatitude and its application to earth-ionosphere communication systems [PDF]

, 1993
205-206The IEC data obtained from three midlatitude stations Tokyo (33.5°N, I38.7°E)and Osan (34.0°N, 127.0°E)in the Pacific and Athens (34.5°N, 18.4°E)in the Mediterranean region, during solar maximum period January-December 1980(Z = 154.6)have been ...
Tyagi, T R, Bhattacharyya, M, Bhuyan, P K   +2 more
core  

Major upwelling and overturning in the mid-latitude F region ionosphere

Nature Communications, 2018
The ionosphere can give rise to irregularities that can interfere with radio communication, navigation and satellite systems. Here the authors present unique observations from the Arecibo Radio Observatory in Puerto Rico to reveal the existence of plasma
David Hysell, Miguel Larsen, David Fritts, Brian Laughman, Michael Sulzer   +4 more
doaj   +1 more source

Ionospheric Mechanisms Leading to Plasma‐Bubble Zonal Drift Reversal and Deformation During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 10, October 2026.
Abstract We present a multi‐instrument analysis of the ionospheric response to the intense geomagnetic storm of 12 November 2025 over the American sector, with emphasis on the longitudinally asymmetric deformation, latitudinal expansion, and zonal drift reversal of equatorial plasma bubbles (EPBs).
G. A. S. Picanço, I. Galkin, P. Song, E. Astafyeva, L. C. A. Resende, J. P. Marchezi, L. A. da Silva, P. R. Fagundes, C. M. Denardini, C. Martinis, A. M. Santos, V. G. Pillat, A. J. Coster, A. L. Christovam, S. R. Laranja, M. A. M. Lopes   +15 more
wiley   +1 more source

Effects of strong IMF B_z southward events on the equatorial and mid-latitude ionosphere [PDF]

Annales Geophysicae, 2009
Dayside ionospheric response to five intense geomagnetic storms (Dst<−120 nT) that occurred in 2001–2005 was investigated by use of simultaneous TEC measurements by the CHAMP, SAC-C, TOPEX/Jason-1 satellites.
E. Astafyeva, E. Astafyeva
doaj   +1 more source

Observation of Shortwave Fadeout Events Using Chinese Dual Auroral Radar Network (CN‐DARN) During the Severe Solar Storm in May 2024

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Shortwave fadeout (SWF) is a typical dayside high‐frequency radio disturbance caused by solar flare‐induced ionospheric ionization enhancement. Using newly built Chinese Dual Auroral Radar Network (CN‐DARN) observations, we investigate two X‐flare‐driven SWFs during the May 2024 geomagnetic superstorm (SYM‐H = −518 nT), on 10 May (pre‐storm ...
Junjie Tong, Jiaojiao Zhang, Hang Li, Wei Wang, Bianlong Zhao, Wenqian Chen, Xiang Deng, Ailan Lan, Jingye Yan, Chi Wang   +9 more
wiley   +1 more source

The Persistent Ionospheric Responses Over Japan After the Impact of the 2011 Tohoku Earthquake

Space Weather, 2020
In this study, we report the persistent impacts of the 2011 Tohoku earthquake/tsunami on the ionosphere using the ground‐based Global Navigation Satellite System and FORMOSAT‐3/COSMIC total electron content.
Min‐Yang Chou, Iurii Cherniak, Charles C.H. Lin, N.M. Pedatella   +3 more
doaj   +1 more source

Analysis of the Geomagnetic Storm of May 2024 at Ebre and Livingston Island Observatories and of the GICs Generated in the Spanish Power Transmission Grid

Space Weather, Volume 24, Issue 10, October 2026.
Abstract This study analyzes the 10–12 May 2024 geomagnetic storm using data from the Ebre (Spain) and Livingston Island (Antarctica) geomagnetic observatories, together with modeling approaches to assess its impact on the Spanish power transmission grid.
J. M. Torta, S. Marsal
wiley   +1 more source

Evaluation of Automated Spread–F (SF) Detection over the Midlatitude Ionosphere

Atmosphere
The present study evaluates an automated Spread–F (SFP) detection algorithm by integrating SF-related (QF, FF) and ionospheric parameters (hmF2, h’F), acting as an indicator for SF events, from SAO Explorer auto-scaled (ARTIST) data, compared to manually
Krishnendu Sekhar Paul, Trisani Biswas, Haris Haralambous   +2 more
doaj   +1 more source

Remote sensing planetary waves in the midlatitude mesosphere using low frequency transmitter signals [PDF]

Annales Geophysicae, 2011
Very low and low radio frequency (VLF/LF) propagation responds sensitively to the electron density distribution in the lower ionosphere (upper mesosphere).
E. D. Schmitter
doaj   +1 more source