Abstract
THE Kodaikanal Observatory magnetographs recorded the “sudden commencement” of this storm on August 11 at 6h. 58m. G.M.T., horizontal force showing an instantaneous rise of 149γ and vertical force about 35γ, while the declination magnet was deflected, about I′ towards west. I have measured the three traces, and, after making due allowance for the errors affecting the hour-marks, the following values were obtained:—
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EVERSHED, J. The Magnetic Storm of August 11–12, 1919. Nature 104, 436 (1920). https://doi.org/10.1038/104436a0
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DOI: https://doi.org/10.1038/104436a0
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