Results 21 to 30 of about 501,910 (164)
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
Vertical winds as a plausible cause for equatorial counter electrojet
Geophysical Research Letters, 1980 The signatures of the counter‐electrojet that occurs in the afternoon hours as recorded on the ground and satellite‐borne magnetometers during the magnetically quiet days, clearly indicate reversal of the jet current in a narrow latitude region centered around the dip equator.
R. Raghavarao, B. Anandarao
semanticscholar +2 more sources
MEAN WINDS AND TIDAL COMPONENTS AT THE EQUATOR DURING COUNTER ELECTROJET EVENTS
Brazilian Journal of Geophysics, 2018 Para solicitação de resumo, entrar em contato com editor-chefe (editor@sbgf.org.br).
V. Somayajulu +3 more
semanticscholar +2 more sources
Space WeatherDuring the recovery phase of the Gannon Superstorm on 11 May 2024, the thermosphere‐ionosphere system experienced dramatic changes marked by an unusual redistribution of plasma density.
K. Shimna +5 more
doaj +2 more sources
Solar flare effects on the geomagnetic elements during normal and counter electrojet periods [PDF]
Earth, Planets and Space, 1999 The paper describes the study of solar flare effects (sfe) on horizontal (H), eastward (Y) and vertical (Z) components of the geomagnetic field at the Indo-USSR chain of magnetic observatories extending from the magnetic latitudes 0° to 45°N, a network ...
R. G. Rastogi +4 more
semanticscholar +2 more sources
Mean winds and tidal components during counter electrojet events
Geophysical Research Letters, 1993 The first observations of mean winds and the amplitude and phases of the tidal components measured with a meteor wind radar located at Trivandrum (8.5°N, 77°E) during five consecutive days of counter electrojet events identified in the horizontal component of the earth's magnetic field from January 27–31, 1987 are described. The mean zonal winds in the
V. Somayajulu +4 more
semanticscholar +2 more sources
The equatorial counter electrojet: Part of a worldwide current system?
Geophysical Research Letters, 2002 The method of natural orthogonal components was applied to the ground geomagnetic data in the Central Asian sector (72–83°E), during the summer months of 1995, in an attempt to identify additional current systems that are superposed on the normal Sq current vortex and related to the equatorial counter electrojet (CEJ).
S. Gurubaran
semanticscholar +2 more sources
Longitudinal Difference in Magnetic Field Variations Associated with Quiet Day Counter Electrojet.
Journal of geomagnetism and geoelectricity, 1993 Significant features of a rare sequence of noon-time counter electrojet events in the Indian sector are analysed. They are compared with records from nearby electrojet stations in the east and west to show the limited longitudinal extent of the noon-time CEJ. It is also shown that quiet-time CEJ is not altogether controlled by lunar tidal oscillations.
G. Rangarajan, R. G. Rastogi
semanticscholar +3 more sources
The QBO modulation of the occurrence of the counter electrojet
Geophysical Research Letters, 1995 Continuous hourly measurements of horizontal component of geomagnetic field obtained at Trivandrum, India, have been used to study the occurrence of the Counter Electrojet (CEJ). Because the data cover nearly three solar activity cycles, they can be used to investigate long‐term variations of the CEJ. After the data have been processed and detrented to
Peiyan Chen, Yi Luo, Jun Ma
semanticscholar +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