scholarly journals The characterization of diffusion tensor for mid-latitude ionospheric plasma

2014 ◽  
Vol 57 (2) ◽  
Author(s):  
Selcuk Sagir ◽  
Ali Yesil ◽  
Gulay Sanac ◽  
Ibrahim Unal
Keyword(s):  
Magnetic Field ◽  
Electrical Conductivity ◽  
Diffusion Coefficient ◽  
Diffusion Tensor ◽  
Earth’S Magnetic Field ◽  
Longitudinal Conductivity ◽  
Earth's Magnetic Field ◽  
Semi Empirical ◽  
The Relationship

<p>In this study, the relationship between diffusion and the electrical conductivity tensor is investigated by using the real geometry of the Earth’s magnetic field in the Northern Hemisphere for mid-latitudes. This relationship is derived from equation. Only in the elements of the diagonal of the tensor is an equal relationship found between the electrical conductivity called the longitudinal conductivity and the diffusion coefficient. The diagonal elements are equal to each other and do not depend on the Earth’s magnetic field; however, the other elements of the tensor strongly depend on the Earth’s magnetic field and they have characteristic of Bohm diffusion became a semi-empirical model (D<sub>B</sub>= (1/16)kT/eB) but they do not depend on the electrical conductivity or the classical diffusion coefficient.</p>

scholarly journals II. The lunar diurnal magnetic variation at Greenwich and other observatories

1926 ◽  
Vol 225 (626-635) ◽  
pp. 49-91 ◽  
Keyword(s):  
Magnetic Field ◽  
Electrical Conductivity ◽  
Diurnal Variation ◽  
Solid Earth ◽  
Upper Atmosphere ◽  
Earth’S Magnetic Field ◽  
Terrestrial Magnetism ◽  
Magnetic Variation ◽  
Earth's Magnetic Field ◽  
The Subject

§ 1. The present research forms part of a wider investigation of terrestrial magnetism, the main object of which is the study of certain electrical phenomena that are associated with solar emissions absorbed in the upper atmosphere, and with the systematic motions of the upper atmosphere. The subject also bears on the electrical conductivity of the solid earth and oceans. The results are briefly discussed from this standpoint in Part IV. The immediate subject of the paper is the lunar diurnal variation of the earth’s magnetic field, and particularly that of the declination at Greenwich, although the results of extensive reductions for other elements, at Batavia, Zikawei, and Pavlovsk, are also included.

MAGNETIC ANOMALIES AND MAGNETIZATIONS OF THE BIWABIK IRON‐FORMATION, MESABI AREA, MINNESOTA

Geophysics ◽  
1962 ◽  
Vol 27 (5) ◽  
pp. 627-650 ◽  
Author(s):  
Gordon D. Bath
Keyword(s):  
Magnetic Field ◽  
Magnetic Anomalies ◽  
Iron Formation ◽  
Earth’S Magnetic Field ◽  
Aeromagnetic Anomalies ◽  
Magnetite Content ◽  
Earth's Magnetic Field ◽  
Relationship Of ◽  
The Relationship ◽  
Iron Formations

In a study of the relationship of magnetic anomalies to the magnetite content and structure of layered Precambrian iron‐formations, the effective induced and remanent magnetizations of the Biwabik iron‐formation were determined by analyses of aeromagnetic anomalies recorded 1,000 ft above the Biwabik in areas of known geology. The induced magnetization along the layers is relatively insignificant because the formation is almost perpendicular to the earth’s magnetic field. For the relatively unmetamorphosed iron‐formation of the Main Mesabi district, the dominant magnetization was found to be across the layers, about 0.012 gauss, and most likely induced. For the strongly metamorphosed iron‐formation of the East Mesabi district, the dominant magnetization was found to be along the layers, about 0.100 gauss, and remanent. These values are used as bases for explaining aeromagnetic anomalies from correlatives of the Biwabik iron‐formation in the Gunflint, Cuyuna, and Gogebic districts.

The Atlas of the Earth's Magnetic Field

2012 ◽  
Author(s):  
A. Soloviev ◽  
A. Khokhlov ◽  
E. Jalkovsky ◽  
A. Berezko ◽  
A. Lebedev ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Earth’S Magnetic Field ◽  
Earth's Magnetic Field

Atlas of Earth's magnetic field

2011 ◽  
Vol 12 (2) ◽  
pp. 1-9
Author(s):  
A. E. Berezko ◽  
A. V. Khokhlov ◽  
A. A. Soloviev ◽  
A. D. Gvishiani ◽  
E. A. Zhalkovsky ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Earth’S Magnetic Field ◽  
Earth's Magnetic Field

scholarly journals Night-time Sferic Propagation at Frequencies Below 10 KHz

1967 ◽  
Vol 20 (1) ◽  
pp. 101 ◽  
Author(s):  
KJW Lynn ◽  
J Crouchley
Keyword(s):  
Magnetic Field ◽  
Geographic Distribution ◽  
Angle Of Incidence ◽  
European Studies ◽  
Earth’S Magnetic Field ◽  
Night Time ◽  
The West ◽  
Earth's Magnetic Field ◽  
Effective Angle

Results of a study at Brisbane of individual night-time sferics of known origin are described. A propagation attenuation minimum was observed in the 3-6 kHz range. The geographic distribution of sferic types was also examined. Apparent propagation asynunetries were observed, since sferics were detected at greater ranges to the west than to the east at 10 kHz, whilst the number of tweek-sferics arising from the east was about four times that arising from the west. Comparison with European studies suggest that these asymmetries are general. These results are then " interpreted in terms of an ionospheric reflection cgefficient which is a function of the effective angle of incidence of the wave on the ionosphere and of orientation with respect to the Earth's magnetic field within the ionosphere.

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