Abstract
WHILE examining data for atmospheric pressure and terrestrial magnetism at various observatories of the Meteorological Office to discover possible relationships, and after meeting with no clear-cut success so long as attention was confined to daily mean values of pressure, I have now obtained results pointing to a hitherto unsuspected relation between the type of the diurnal variation of pressure and the general state of magnetic conditions, as regards disturbance and quiet, over the earth. As the best available index of the degree of magnetic disturbance on each Greenwich day, the international magnetic character figure was used ; the pressure data were those for Aberdeen Observatory as printed in the Observatories' Year Books of the Meteorological Office, Air Ministry. Mean diurnal inequalities of pressure corrected for non-periodic change were computed for the two sets of days, magnetically quiet and magnetically disturbed, on the basis of the five days of each type per month selected at De Bilt over the seven years 1922–28.
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STAGG, J. Atmospheric Pressure and the State of the Earth's Magnetism. Nature 127, 402 (1931). https://doi.org/10.1038/127402a0
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DOI: https://doi.org/10.1038/127402a0
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