|Author||Stegelmann, E. J. ♦ von Kenschitzki, C. H.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||PHYSICS ♦ ABSORPTION ♦ BEAMS ♦ CONFIGURATION ♦ EARTH ♦ EQUATIONS ♦ INTERACTIONS ♦ MAGNETIC FIELDS ♦ MAGNETOHYDRODYNAMICS ♦ MOTION ♦ PERFORMANCE ♦ PLASMA ♦ SHOCK WAVES ♦ SUN ♦ TURBULENCE ♦ VARIATIONS|
|Abstract||The propagation and geometric attenuation of hydromagnetic waves in the geomagnetic field are calculated by the methods of geometrical optics. The waves are assumed to be generated by point sources located at a distance of 6 earth radii from the center of the earth. It is shown that the ray tracing method candnot be used to explain the rise time of sudden commencements of geomagnetic storms. However, the calculated propagation times of hydromagnetic disturbances can give an understanding of delay times and latitude dependence of arrival times. If extended sources are considered, the following conclusion results from the analysis: According to geometric optics, hydromagnetic disturbances of the fast mode produced at 6 earth radii by the interaction of a solar plasma front with the earth's magnetosphere will reach the earth only if they are produced in a region within a radius of a few thousand kilometers of the subsolar point. (auth)|
|Learning Resource Type||Article|
|Publisher Department||Lockheed-California Co., Burbank|
|Journal||Journal of Geophysical Research|
|Organization||Lockheed-California Co., Burbank|
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