Abstract
MAGNETIC ‘STORM’ AND Sunspots.—On Oct. 12, at 10½h, a considerable disturbance commenced and lasted mtil 21 on the following morning. The chief characteristies as shown by the declination magnetograph records at Greenwich were, first, the sudden commencement; and secondly, the occurrence between 18h and 21h of three distinct waves of magnitude about 30′, 25′, and 40′ respectively. The total range in declination throughout the disturbance was about 1°. A lesser disturbance, of interest on account of its sharp commencement, also took place between Oct. 9, 20½h and Oct. 10, 23h.
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Our Astronomical Column. Nature 120, 597 (1927). https://doi.org/10.1038/120597a0
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DOI: https://doi.org/10.1038/120597a0