Results 31 to 40 of about 1,267 (222)

French participation in the International Equatorial Electrojet Year [PDF]

Annales Geophysicae, 1998
Without abstractAcknowledgements. The IEEY studies in the African sector were made possible by the participation of a large number of institutes. Funding was provided by the Ministère Français de la Coopération (Département de la Recherche et des ...
Y. Cohen
doaj   +1 more source

The quiet-time equatorial electrojet and counter-electrojet.

Journal of geomagnetism and geoelectricity, 1979
Using ground magnetometer data from several stations near the dip equator, the magnetically quiet-time characteristics of the daytime normal electrojet and the morning and afternoon counter-electrojets are established and illustrated. In particular, the solar cycle, seasonal, longitudinal and day-to-day variations of counter-electrojets as well as ...
MARRIOTT, R. T., RICHMOND, A. D., VENKATESWARAN, S. V.   +2 more
openaire   +2 more sources

Impact of Doubled CO2 on the Response of the Mesosphere, Thermosphere, and Ionosphere to the 2008–2009 Sudden Stratospheric Warming

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract We investigate the impact of the 2008–2009 sudden stratospheric warming (SSW) event on the mesosphere, thermosphere, and ionosphere under conditions of doubled carbon dioxide (CO2). Using the Specified Dynamics Whole Atmosphere Community Climate Model with thermosphere‐ionosphere eXtension model, we perform two simulations for the 2008–2009 ...
Sunil Kumar, Jens Oberheide, B. C. Martinez   +2 more
wiley   +1 more source

Up-down asymmetry of type I plasma waves in the equatorial electrojet region [PDF]

Annales Geophysicae, 1997
The up-down asymmetry of the type I plasma waves in the equatorial electrojet region during daytime is investigated. It is shown that the asymmetry is exhibited not only in the vertical direction but also is manifested in the oblique direction (24.6 ...
S. Ravindran, B. V. K. Murthy
doaj   +1 more source

Height‐Dependent Evolution of the Ionospheric Response to the May 2024 Superstorm: Global GNSS‐POD, GNSS‐RO, and Ground‐Based Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract Capturing global ionospheric response during extreme geomagnetic storms remains a major observational challenge. During 10–11 May, 2024 superstorm, we investigate the height‐dependent response of the F‐region using multi‐constellation GNSS‐POD limb‐sounding measurements from COSMIC‐2, Spire, PlanetiQ, and FengYun‐3 satellites. Approximately 12,
Nimalan Swarnalingam, Dong L. Wu, Daniel J. Emmons, Cornelius Csar Jude H. Salinas   +3 more
wiley   +1 more source

Signatures of storm sudden commencements in geomagnetic H, Y and Z fields at Indian observatories during 1958−1992 [PDF]

Annales Geophysicae, 1999
The work describes an intensive study of storm sudden commencement (SSC) impulses in horizontal (H), eastward (Y) and vertical (Z) fields at four Indian geomagnetic observatories between 1958–1992. The midday maximum of ΔH has been shown to exist even
R. G. Rastogi
doaj   +1 more source

Equatorial Counter Electrojet & Interplanetary Magnetic Field [PDF]

, 1981
1-15The characteristics of equatorial counter electrojet events associated with the reversal of the Bz component of interplanetary magnetic field (IMF) are discussed and compared with those of events associated with semi-diurnal luni-solar tides.
Rastogi, R G
core  

Accurate Ionospheric TEC Prediction With a Causal Attention Network at Northern EIA Crests

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract As the Sun approaches the peak of its 25th activity cycle, precise ionospheric forecasting has become increasingly challenging. Low‐latitude regions have emerged as a persistent bottleneck for space weather operations. Extensive evidence reveals that existing AI models exhibit significant performance degradation in these regions, demonstrating
Tong Liu, Wu Chen, Zexin Lu, Wenlong Zhang, Yuhang Lu, Feng Wang, Mengfei Sun, Wenfeng Nie, Junsheng Ding, Yufang He, Bo Chen   +10 more
wiley   +1 more source

Space Weather Effects From Moderate to Severe Geomagnetic Storms in October 2024 Over the Latin American Sector

Space Weather, Volume 24, Issue 6, June 2026.
Abstract This study presents a detailed case study of the ionospheric impacts of moderate (G2) and severe (G4) geomagnetic storms over the Latin American sector, with particular emphasis on the formation and suppression of equatorial plasma bubbles (EPBs).
C. S. Carmo, L. Dai, C. M. Wrasse, D. Barros, H. Takahashi, J. R. Costa, L. F. R. Vital, P. R. Jauer, C. De La Jara, A. J. Carrasco, C. A. O. B. Figueiredo, C. Wang, H. Li, Z. Liu   +13 more
wiley   +1 more source

Equatorial Electrojet Current System [PDF]

, 1972
12-18Equatorial electrojet is a day-time enhancement of the normal Sq field in a narrow band of 4-5ᵒ width along the magnetic equator. Its width, intensity, seasonal and sunspot cycle variations over different regions of the earth have been discussed ...
Rao, K. S. Raja
core