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Generation of ULF waves by electric or magnetic dipolesThe generation of ULF waves by ground-based magnetic and electric dipoles is studied with a simplified model consisting of three adjoining homogeneous regions representing the groud, the vacuum (free space) region, and the ionosphere. The system is assumed to be immersed in a homogeneous magnetic field with an arbitrary tilt angle. By the use of Fourier techniques and the method of stationary phase, analytic expressions are obtained for the field strength of the compressional Alfven waves in the ionosphere. Expressions are also obtained for the strength of the torsional Alfven wave in the ionosphere and the ULF magnetic field at ground level. Numerical results are obtained for the compressional Alfven-wave field strength in the ionosphere with a nonvertical geomagnetic field and for the ULF magnetic field at ground level for a vertical geomagnetic field.
Document ID
19750058660
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Harker, K. J.
(Stanford University Stanford, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
August 1, 1975
Publication Information
Publication: Journal of Geophysical Research
Volume: 80
Subject Category
Geophysics
Accession Number
75A42732
Funding Number(s)
CONTRACT_GRANT: N00014-67-A-0112-0066
CONTRACT_GRANT: NGL-05-020-176
Distribution Limits
Public
Copyright
Other

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