Abstract
SEVERAL workers, the earliest of whom seems to be Schuster1, have extensively analysed the world-wide distribution of the daily magnetic field variation, in order to obtain estimates of crustal electrical conductivity. Much of this work was done before the advent of high speed computers, and may have been affected by subjective errors. The object of this communication is to present the results obtained by a full Fourier analysis of a year's data from two British observatories. Comparison of these allows the errors in amplitude and phase of the spectral peaks to be estimated.
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References
Schuster, A., Phil. Trans. Roy. Soc., A, 208, 163.
Riddihough, R. P., Nature, 215, 720 (1967).
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LAMDEN, R. Trend in the Harmonic Energies of the Diurnal Variation at Two British Observatories. Nature 217, 347–349 (1968). https://doi.org/10.1038/217347a0
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DOI: https://doi.org/10.1038/217347a0
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