Abstract
IN 1948, H. W. Newton1 found that the diurnal frequency of occurrence of ‘sudden commencements’ associated with geomagnetic disturbances at Greenwich over the period 1879–1944 had a broad minimum around 8 hr., and suggested that the effect was likely to be a local one. The available data from certain other observatories appeared to support this view.
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References
Mon. Not. Roy. Astro. Soc., Geophys. Supp., 5, 159 (1948).
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FERRARO, V., PARKINSON, W. Sudden Commencements in Geomagnetism: their Dependence on Local Time and Geomagnetic Longitude. Nature 165, 243–244 (1950). https://doi.org/10.1038/165243a0
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DOI: https://doi.org/10.1038/165243a0
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