Results 51 to 60 of about 1,267 (222)

Equatorial Electrojet & Interplanetary Plasma Parameters [PDF]

, 1975
132-137A comparative study of the day-to-day changes of equatorial electrojet parameters and interplanetary plasma parameters indicates that the normal noon-time electrojet weakens and counter-electrojet intensifies when positive B∞ (towards sun ...
Kane, R. P.
core  

Westward equatorial electrojet during daytime hours

, 1974
The phenomenon of the depression of the geomagnetic horizontal field during the daytime hours of magnetically quiet days at equatorial stations is described.
Rastogi, R. G.
core   +1 more source

Typical disturbances of the daytime equatorial F region observed with a high-resolution HF radar [PDF]

Annales Geophysicae, 1998
HF radar measurements were performed near the magnetic equator in Africa (Korhogo 9°24'63''N–5°37'38''W) during the International Equatorial Electrojet Year (1993–1994). The HF radar is a high-resolution zenithal radar.
E. Blanc, E. Houngninou
doaj   +1 more source

Drivers of F‐Region Ionosphere Tidal Variability Caused by the Madden Julian Oscillation: Separating E‐Region Dynamo and Field‐Aligned Wind Effects

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract The Madden–Julian Oscillation (MJO), a recurring intraseasonal (30–96 days) disturbance in the troposphere, strongly influences the E‐region and F‐region ionosphere through its modulation of atmospheric tides. Among these, the diurnal eastward wave number 3 (DE3) tide, driven by MJO‐modulated latent heating, carries MJO signals upward into the
Deepali Aggarwal, Jens Oberheide, B. C. Martinez, Xian Lu, Sunil Kumar   +4 more
wiley   +1 more source

Distortions in the height structure of the equatorial electrojet during counter electrojet events

, 1994
This paper presents simultaneous observations made near the magnetic equator during counter electrojet events using a coherent VHF backscattcr radar, magnetometer and digital ionosonde to understand the physical processes that generate the counter ...
Subbarao, K. S. V., Viswanathan, K. S., Cherian, L., Somayajulu, V. V.   +3 more
core   +1 more source

Ionospheric Vertical Plasma Drifts Over South America: Long‐Term Multi‐Instrument Observations and TIEGCM and WACCM‐X Evaluations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract We present the first comprehensive multi‐instrument climatological study of quiet‐time equatorial F‐region vertical plasma drifts across South America, a region where the magnetic declination angle varies significantly. Our analysis of well‐established long‐term ground‐based data sets from the Jicamarca incoherent scatter radar spanning 1968 ...
Sophia R. Laranja, Bela G. Fejer, Clezio M. Denardini, Ludger Scherliess, Laysa C. A. Resende, Sony S. Chen, Giorgio A. S. Picanço   +6 more
wiley   +1 more source

Equatorial F-region during Counter-electrojet [PDF]

, 1979
1-5The bottom side electron density profiles on two strong counter-electro days (27 and 28 Nov. 1967) are studied from the quarter-hoirly ionograms at an equatorial station, Kosikanal (sip 3.4oN). The typical equatorial noon bite-out in maximum F2-region
Sethia, G, Janve, A V, Chandra, H, Rastogi, R G   +3 more
core  

Magnetotail Source of Premidnight Upward Field‐Aligned Currents: Nature of the Substorm Current System

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract The substorm current wedge constitutes the backbone of the substorm current system. Its field‐aligned current components include an upward current in the premidnight sector and a downward current in the midnight‐morning sector, which connect the auroral ionosphere to the magnetotail.
Tsugunobu Nagai, Iku Shinohara
wiley   +1 more source

Responses of Field‐Aligned Currents and Equatorial Electrojet to Sudden Decrease of Solar Wind Dynamic Pressure During the March 2023 Geomagnetic Storm

Geophysical Research Letters
We present the observations of field‐aligned currents and the equatorial electrojet during the 23 March 2023 magnetic storm, focusing on the effect of the drastic decrease of the solar wind dynamic pressure occurred during the main phase.
Guan Le, Guiping Liu, Endawoke Yizengaw, Chin‐Chun Wu, Yihua Zheng, Sarah Vines, Natalia Buzulukova   +6 more
doaj   +1 more source

Investigation of the response time of the equatorial ionosphere in context of the equatorial electrojet and equatorial ionization anomaly [PDF]

Annales Geophysicae, 2011
Equatorial Electrojet (EEJ) and Equatorial Ionization Anomaly (EIA) are two large-scale processes in the equatorial/low latitude ionosphere, driven primarily by the eastward electric field during daytime.
L. Jose, S. Ravindran, C. Vineeth, T. K. Pant, S. Alex   +4 more
doaj   +1 more source