Abstract
MAGNETIC DISTURBANCES AND SUNSPOTS.—On Oct. 22, a magnetic disturbance commenced sharply at 6¾ and continued until lOh on Oct. 23 with an intervening diminution between 16h and midnight. During the first phase the excursion shown by the Greenwic declination magnetograph traces was and during the second about 40′. The disturbance is worth comment on account of its being one of those instances in which it does not appear possible to ascribe a connexion between a pronounced magnetic disturbance and a particular sunspot. A small stream of spots crossed the suns central meridian on Oct. 22–6, but in general appearance it was but one of many which are now of frequent occurrence. An examination by Mr. Evershed of spectroheliograms tnkcn nt his observatory at Ewhurst, Surrey, also failed to show any unusual solar activity (the daily record at Ewhurst, as elsewhere in Great Britain, was, however, broken by cloudy weather).
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Our Astronomical Column. Nature 120, 670 (1927). https://doi.org/10.1038/120670a0
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DOI: https://doi.org/10.1038/120670a0