Results 131 to 140 of about 312 (156)
ELECTRIC FIELDS IN THE E REGION DURING THE COUNTER ELECTROJET
, 1979 The electron density distribution in the E region during counter electrojets is investigated. Rocket-borne Langmuir probes were flown from Thumba, India (dip 0.47 arcmin S) on August 17, 1972, a magnetically quiet day, and on April 25, a magnetically ...
S. Prakash +3 more
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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 ...
Y Ebihara, T Tanaka, T Kikuchi
exaly +2 more sources
Journal of Geophysical Research: Space Physics, 2018 Studies made earlier using ground-based observations of geomagnetic field over the Indian longitudes revealed that the occurrence of equatorial counter electrojet (CEJ) events in afternoon hours is more frequent during June solstice (May-June-July-August)
Kuldeep Pandey, R Sekar, B G Anandarao
exaly +2 more sources
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Equatorial Electrojet and Counter Electrojet caused by the 15 January 2022 Tonga Volcanic Eruption
2023We present space and ground-based multi-instrument observations demonstrating the impact of the 2022 Tonga volcanic eruption on dayside equatorial electrodynamics. A strong counter electrojet (CEJ) was observed by Swarm and ground-based magnetometers on 15 January after the Tonga eruption and during the recovery phase of a moderate geomagnetic storm ...
Guan Le +3 more
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Journal of Geophysical Research: Space Physics, 1981
Measurements of plasma instabilities in the equatorial electrojet with HF and VHF radars have always been performed in a large scale turbulent medium. It is only in the exceptional case of a strong daytime counter‐electrojet, as observed in Africa in 1977, that the background can be considered as almost laminar.
C. Hanuise, M. Crochet
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Measurements of plasma instabilities in the equatorial electrojet with HF and VHF radars have always been performed in a large scale turbulent medium. It is only in the exceptional case of a strong daytime counter‐electrojet, as observed in Africa in 1977, that the background can be considered as almost laminar.
C. Hanuise, M. Crochet
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Counter equatorial electrojet currents in the Indian zone
Planetary and Space Science, 1973The paper describes the phenomenon of afternoon depression of the geomagnetic H field on quiet days near the magnetic equator in the Indian zone. These events occur most frequently around 1600 solar hr and are localized in longitude; sometimes, not seen at stations separated by even 2 hr LT.
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Lunar effects in the counter electrojet near the magnetic equator
Journal of Atmospheric and Terrestrial Physics, 1974Abstract The examination of H magnetograms of Huancayo for the period, 1948–1971, has shown that the negative effects on the daily variation of H occur primarily in the morning hours around 07 hr and in the evening between 15 and 17 hr. The occurrence of the evening event is maximum around lunar ages 1.4 and 13.4 hr or around lunar times 2.2 and ...
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The enigma of the counter equatorial electrojet and lunar tidal influences in the equatorial region
Advances in Space Research, 1992Abstract The properties of the counter-electrojet (CEJ) are reviewed together with some of the theories proposed to explain these. It appears that most of the properties can be explained by an additional current system driven by a solar or lunar semidiurnal tide.
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Characteristics of Counter Electrojet Using Multi‐Spacecraft Swarm Observations
Journal of Geophysical Research: Space PhysicsAbstractThe characteristics of the westward ionospheric current flowing at the geomagnetic equator, known as Counter Electrojet (CEJ), are studied here using multi‐satellite Swarm mission magnetic field data collected during January 2014 to March 2021.
J. Sreelakshmi, Geeta Vichare
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Do solar eclipses trigger counter equatorial electrojets ?
2008The occurrence of counter electrojets as a response of the equatorial electrojet to solar eclipses is studied in this work. We analyzed the magnetic field measurements obtained by three satellites, CHAMP, SAC-C and Ørsted and correlated them with ground-base observations during the eclipses.
Tomás, A. +5 more
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