Asymmetries in the equatorial electrojet around N-E Brazil sector [PDF]
Annales Geophysicae, 2009 The paper examines the data of geographic northward (X), eastward (Y) and vertical (Z) components of the magnetic field from a dense array of 26 vector magnetometers operated in N-NE Brazil from November 1990 to March 1991.
R. G. Rastogi, N. B. Trivedi
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Equatorial electrojet as part of the global circuit: a case-study from the IEEY [PDF]
Annales Geophysicae, 1998 Geomagnetic storm-time variations often occur coherently at high latitude and the day-side dip equator where they affect the normal eastward Sq field. This paper presents an analysis of ground magnetic field and ionospheric electrodynamic data related
A. T. Kobea +7 more
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Improving and testing the empirical equatorial electrojet model with CHAMP satellite data [PDF]
Annales Geophysicae, 2004 The longitudinal variation of the Equatorial Electrojet (EEJ) intensity has been revised including data from the equatorial station of Baclieu (Vietnam), where an unexpected enhancement of the EEJ magnetic effects is observed.
V. Doumouya, Y. Cohen
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Evidence and effects of a wave-driven nonlinear current in the equatorial electrojet [PDF]
Annales Geophysicae, 1997 Ionospheric two-stream waves and gradient-drift waves nonlinearly drive a large-scale (D.C.) current in the E-region ionosphere. This current flows parallel to, and with a comparable magnitude to, the fundamental Pedersen current.
M. Oppenheim
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AE, D ST and their SuperMAG Counterparts : the effect of improved spatial resolution in geomagnetic indices [PDF]
, 2020 For decades, geomagnetic indices have been used extensively to parameterize space weather events, as input to various models and as space weather specifications.
Bergin, Aisling +2 more
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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 +7 more
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On Ps6 and longer period geomagnetic pulsations in the Indian equatorial region [PDF]
Annales Geophysicae, 1994 Adopting an appropriate procedure suitable for processing the amplitude-time records based on the two-component spectral analysis technique, the statistical information on Ps6 and other longer periods are worked out on the geomagnetic field ...
D. R. K. Rao, R. L. Asinkar
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Characterizations of the diurnal shapes of OI 630.0 nm dayglow intensity variations: inferences [PDF]
Annales Geophysicae, 2002 Measurements of OI 630.0 nm thermospheric dayglow emission by means of the Dayglow Photometer (DGP) at Mt. Abu (24.6° N, 73.7° E, dip lat 19.09° N), a station under the crest of Equatorial Ionization Anomaly (EIA), reveal day-to-day changes in the ...
D. Chakrabarty +6 more
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An intense SFE and SSC event in geomagnetic H, Y and Z fields at the Indian chain of observatories [PDF]
Annales Geophysicae, 1997 Changes in the three components of geomagnetic field are reported at the chain of ten geomagnetic observatories in India during an intense solar crochet that occurred at 1311 h 75° EMT on 15 June 1991 and the subsequent sudden commencement (SSC) of ...
R. G. Rastogi +5 more
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Simulations of secondary Farley-Buneman instability driven by a kilometer-scale primary wave: anomalous transport and formation of flat-topped electric fields [PDF]
, 2019 Since the 1950s, high frequency and very high frequency radars near the magnetic equator have frequently detected strong echoes caused ultimately by the Farley‐Buneman instability (FBI) and the gradient drift instability (GDI).
Dimant Y. S. +4 more
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