SOME QUANTITATIVE CHARACTERISTICS OF THE SCHUMANN-ELF NATURAL ELECTROMAGNETIC BACKGROUND
Author:
- J. A. ShandJSJ. A. Shand
- 1 March 1966
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Physics
- Vol. 44 (3) , 449-459
Abstract
Samples of Schumann-ELF natural background recorded in three components at widely separated points have been resolved, both by analogue and digital methods, into their constituent modes for quantitative comparison. ELF bursts display a world-wide coherence and uniform average signal strength to a high degree. Corresponding X and Y component traces are virtually identical at sites separated by 1 000 km or less. In contrast, among stations set in differing geological environments the strength of the vertical magnetic components of the same bursts may vary by orders of magnitude. No evidence of solar, auroral, or other nonlightning sources for natural ELF activity has been found.Keywords
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