Results 191 to 200 of about 3,685 (224)

Contours of equatorial electrojet current density

Journal of Atmospheric and Terrestrial Physics, 1989
Abstract A set of 17 rocket measured altitude profiles of the equatorial electrojet current density have been used to determine the parameters of a two-dimensional model of the equatorial electrojet with which the contours of equal current density of the electrojet have been constructed.
C.A. Onwumechili, P.C. Ozoemena
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Contour maps of the equatorial electrojet

Journal of Atmospheric and Terrestrial Physics, 1968
Abstract The magnetic elements tabulated for the four I.G.Y. Pacific observatories of Guam, Koror, Fanning and Jarvis Islands are used to produce contour charts of the diurnal variation field by the method of projecting the observatory onto a geocentric sphere which is stationary with respect to the Sun.
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Westward equatorial electrojet during daytime hours

Journal of Geophysical Research, 1974
The phenomenon of the depression of the geomagnetic horizontal field during the daytime hours of magnetically quiet days at equatorial stations is described. These events are generally seen around 0700 and 1600 LT, being more frequent during the evening than the morning hours.
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Classes of the Equatorial Electrojet

2005
The equatorial electrojet signal recorded on the Overhauser Magnetometer (OVM) on board CHAMP can be divided into four classes: the classical electrojet (EEJ), the counter electrojet (CEJ), no electrojet (NEJ) and a new term, formation of the electrojet (FEJ).
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Geomagnetic disturbances associated with equatorial electrojet

Journal of Atmospheric and Terrestrial Physics, 1964
Abstract Diurnal ranges in the horizontal and vertical force at Kodaikanal, situated about 170 km north of the dip equator in South India, have been worked out for quiet and disturbed days at periods of low as well as high solar activity. The maintenance of the range on disturbed days at the same value as on quiet days is discussed.
B.N. Bhargava, R.V. Subrahmanyan
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Rocket measurement of the equatorial electrojet

Journal of Geophysical Research, 1970
Four Nike-Apache rockets, equipped with cesium vapor magnetometers, were launched in the equatorial electrojet region in March 1965. The rocket launched at the magnetic equator during the period of maximum electrojet current flow detected a 220-γ discontinuity in the magnetic field between 96 and 130 km. A peak current density of 13.5 amp/km² at 106 km
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Introduction to Geomagnetism: The Equatorial Electrojet

American Journal of Physics, 1961
The fundamentals of the measurement of the earth's magnetic field are described. The general form of the geomagnetic field is approximated to the field of a theoretical dipole magnet. The solar daily type (S) of transient variation in the geomagnetic field depends on the solar activity, the seasons, the geographical latitude, and local time.
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Sporadic-E and the equatorial electrojet

Journal of Atmospheric and Terrestrial Physics, 1964
Abstract An analysis of characteristics of sporadic- E at Indian and American equatorial stations has been made for quiet and disturbed days during the year 1958. The analysis reveals certain differences between the two chains of stations which indicate a possible difference in the width of the equatorial electrojet at the two zones.
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Some features of the equatorial electrojet

Planetary and Space Science, 1969
Abstract The equivalent circuit method of Stening (1968) is used to calculate current distributions in the vicinity of the equatorial electrojet. Both height and latitude profiles are obtained which show reasonable agreement with observations. The tube of magnetic force model employed in the calculations is useful in understanding some of the ...
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A thin mantle transition zone beneath the equatorial Mid-Atlantic Ridge

Nature, 2021
Matthew R Agius, Catherine A Rychert, Nicholas Harmon   +2 more
exaly