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Journal of Navigation, 1950
The Institute has now completed two years of its existence. The papers which have been read before it during these two years have covered a wide range of subjects and have served to emphasize the many ramifications of the science of navigation. Because of the high speed of modern aircraft, air navigation presents more problems and of greater variety ...
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The Institute has now completed two years of its existence. The papers which have been read before it during these two years have covered a wide range of subjects and have served to emphasize the many ramifications of the science of navigation. Because of the high speed of modern aircraft, air navigation presents more problems and of greater variety ...
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Contemporary Physics, 1984
Abstract There is a good observational record of the history of the Earth's magnetic field throughout geological time. The physical processes occurring in the liquid core, where the field originates, are very complex however, and they are only just beginning to be understood.
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Abstract There is a good observational record of the history of the Earth's magnetic field throughout geological time. The physical processes occurring in the liquid core, where the field originates, are very complex however, and they are only just beginning to be understood.
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1986
Scientists have been measuring the Earth’s magnetic field for several centuries. They have built up an increasingly more detailed worldwide picture of the field and its variation with time. Field measurements are now made from ships, aeroplanes and satellites as well as on the ground. For older records of the geomagnetic field and its changes with time
Frank Oldfield, Roy Thompson
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Scientists have been measuring the Earth’s magnetic field for several centuries. They have built up an increasingly more detailed worldwide picture of the field and its variation with time. Field measurements are now made from ships, aeroplanes and satellites as well as on the ground. For older records of the geomagnetic field and its changes with time
Frank Oldfield, Roy Thompson
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Protons in the Earth's Magnetic Field
Physical Review Letters, 1959The identity, flux, and energy distribution of particles trapped in the earth's magnetic field were determined for those particles which penetrate more than 6 g/cm/sup 2/ of material. Nuclear emulsions exposed to the Van Allen radiation belt by a Thor-Able ballistic missile were used in the measurements. The separation of protons and electrons was done
Stanley C. Freden, R. Stephen White
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On the magnetic field of the Earth
Terrestrial Magnetism and Atmospheric Electricity, 1911Dr. L. A. Bauer, in his very suggestive paper, “The external electric currents and the Earth's magnetization,”1 has come to the following “working hypothesis:” The Earth is chiefly an electromagnet, the magnetizing currents being outside and consisting of negative electric currents circulating overhead in the same general direction as that of the Earth'
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Reversals of the earth's magnetic field
Physics Reports, 1971Abstract One of the most intriguing problems in geophysics to-day is why the Earth's magnetic field reverses. This review summarizes the progress in our knowledge of the subject since Bullard's [1] Bakerian Lecture to the Royal Society in 1967. Reversals have played a major role in the changed outlook in geological thinking through the development of
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Magnetic field of the earth and planets
Space Science Reviews, 1963Satellite observations and magnetic theory used to describe the planetary magnetic fields and their effects on solar system ...
J. W. Kern, Ernest H. Vestine
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Rotation of the Earth's Magnetic Field
Nature, 1973HALLEY1 first noticed that the magnetic declination at a number of sites changed with time in a manner that was consistent with a steady westward drift of the magnetic field relative to the surface of the Earth. After long neglect, interest in westward drift was revived by the work of Bullard et al.2, who examined the westward drift of the non-dipole ...
I. Saunders, S. R. C. Malin
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Magnetic disturbances and the Earth's magnetic field
Journal of Geophysical Research, 1961An attempt is made to explain the origin of the observed magnetic field of the earth as being due to a current system circulating in the core, the current system in its turn being maintained by world-wide magnetic disturbances. The mantle behaves as a semiconductor, and the conduction electron density is given by the Boltzmann distribution law.
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The Earth’s magnetic field and magnetosphere [PDF]
, 2012 It has been known for hundreds of years that the Earth possesses a magnetic field. The modern science of geomagnetism, however, can probably be dated back to the English physicist William Gilbert who in 1600 published his book De Magnete in which he stated that Magnus magnetis ipse est globus terrestris (“The Earth itself is a great magnet”).
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