Results 11 to 20 of about 1,041 (168)

Counter equatorial electrojet and overshielding after substorm onset: Global MHD simulation study [PDF]

Journal of Geophysical Research: Space Physics, 2014
By performing a global magnetohydrodynamic (MHD) simulation, we have demonstrated for the first time that an electrojet at the dayside magnetic equator can be reversed and an overshielding condition can be established in the inner magnetosphere after ...
Ebihara, Y., Kikuchi, T., Tanaka, T.
core   +3 more sources

Equatorial Ionospheric VTEC Perturbations During the 21 June 2020 Solar Eclipse

Earth and Space Science
The annular solar eclipse of 21 June 2020, provided a valuable opportunity to examine the ionospheric response to celestial events. This study analyzes variations in Vertical Total electron content (VTEC) over the equatorial region using data from the ...
Atirsaw Muluye Tilahun, Asebe Oljira, Melessew Nigussie, Sujan Prasad Gautam, Yohannes Getachew Ejigu   +4 more
doaj   +2 more sources

The equatorial E-region and its plasma instabilities: a tutorial [PDF]

, 2009
In this short tutorial we first briefly review the basic physics of the E-region of the equatorial ionosphere, with emphasis on the strong electrojet current system that drives plasma instabilities and generates strong plasma waves that are easily ...
D. T. Farley
core   +16 more sources

Prompt penetration effects on Equatorial Electrojet from the Indian sector

Earth, Planets and Space, 2023
The morphology of prompt penetration effects (PP) in the Equatorial Electrojet (EEJ) at Vencode (VEN, Geomagnetic latitude 0.29ºN) was studied using 5-min samples of EEJ and interplanetary Ey component data from 2011 to 2015.
R. K. Archana, Kusumita Arora, Nandini Nagarajan   +2 more
doaj   +1 more source

Meridional equatorial electrojet current in the American sector [PDF]

Annales Geophysicae, 1999
Huancayo is the only equatorial electrojet station where the daytime increase of horizontal geomagnetic field (H) is associated with a simultaneous increase of eastward geomagnetic field (Y). It is shown that during the counter electrojet period when ∆
R. G. Rastogi
doaj   +1 more source

Observations of equatorial ionization anomaly over Africa and Middle East during a year of deep minimum [PDF]

Annales Geophysicae, 2017
In this work, we investigated the veracity of an ion continuity equation in controlling equatorial ionization anomaly (EIA) morphology using total electron content (TEC) of 22 GPS receivers and three ground-based magnetometers (Magnetic Data ...
O. Bolaji, O. Bolaji, O. Owolabi, E. Falayi, E. Jimoh, A. Kotoye, O. Odeyemi, B. Rabiu, P. Doherty, E. Yizengaw, Y. Yamazaki, J. Adeniyi, R. Kaka, K. Onanuga   +13 more
doaj   +1 more source

Counter electrojet features in the Brazilian sector: simultaneous observation by radar, digital sounder and magnetometers [PDF]

Annales Geophysicae, 2009
In the present work we show new results regarding equatorial counter electrojet (CEJ) events in the Brazilian sector, based on the RESCO radar, two set of fluxgate magnetometer systems and a digital sounder.
C. M. Denardini, M. A. Abdu, H. C. Aveiro, L. C. A. Resende, P. D. S. C. Almeida, Ê. P. A. Olívio, J. H. A. Sobral, C. M. Wrasse   +7 more
doaj   +1 more source

Electrodynamical response of the Indian low-mid latitude ionosphere to the very large solar flare of 28 October 2003 – a case study [PDF]

Annales Geophysicae, 2009
The electrodynamic effects on the low-mid latitude ionospheric region have been investigated using GPS (global positioning system) data, ionosonde data and ΔH values, during the very large solar flare (X17.2/4B) of 28 October 2003.
G. Manju, T. K. Pant, C. V. Devasia, S. Ravindran, R. Sridharan   +4 more
doaj   +1 more source

On the origin of pre-reversal enhancement of the zonal equatorial electric field [PDF]

Annales Geophysicae, 2009
In November 2004, a large and variable interplanetary electric field (IEF) was felt in the reference frame of the Earth. This electric field penetrated to the magnetic equator and, when the Jicamarca Radio Observatory (JRO) was in the dusk sector ...
M. C. Kelley, R. R. Ilma, G. Crowley
doaj   +1 more source

Equatorial electrojet at African longitudes: first results from magnetic measurements [PDF]

Annales Geophysicae, 1998
In the framework of the French participation in the International Equatorial Electrojet Year (IEEY), ten magnetotelluric stations were installed between November 1992 and November 1994 along a 1200-km-long meridian profile, between Lamto (latitude 6.2°
V. Doumouya, J. Vassal, Y. Cohen, O. Fambitakoye, M. Menvielle   +4 more
doaj   +1 more source