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Detailed Reference Information |
Nickolaenko, A.P. and Hayakawa, M. (1998). Natural electromagnetic pulses in the ELF range. Geophysical Research Letters 25: doi: 10.1029/98GL01699. issn: 0094-8276. |
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We analyze the propagation of electromagnetic waves in the ELF. We apply the modal solution for the spherical Earth-ionosphere cavity and obtain the time domain fields using the FFT algorithm. The Schumann resonance amplitude over the frequency-distance plane consists of summits and depressions exhibiting separate extended zones. When the source--observer distance is small, the field maximum is found at some hundred hertz. This component rapidly decays with the distance. The time domain ELF pulse travels with a constant velocity and bounces from the source antipode. Its width increases along the path due to absorption of the high frequency component. The distance dependence of the pulse amplitude depends on both the geometrical focusing and the high frequency absorption. ¿ 1998 American Geophysical Union |
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Abstract |
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Keywords
Electromagnetics, Transient and time domain, Meteorology and Atmospheric Dynamics, Lightning, Meteorology and Atmospheric Dynamics, Theoretical modeling |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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