Letter | Published:

Earth Currents and Sun-spots

Nature volume 6, page 534 | Download Citation



IN the last number of NATURE there appears a letter from Mr. W. H. Preece respecting the recent occurrence of electric storms of considerable intensity; and in connection with this interesting subject it may be worth while relating that the solar Spots have lately (that is to say, during the last few weeks) been larger than usual. One of them attained great proportions, and was distinctly visible to the unassisted eye (on October 15) through a fog which partially obscured the sun's intense light. On the date mentioned this spot had completed about one-half of its transit across the solar disc, and it is remarkable that on the same day the electric storms attained their maximum, and “the interruptions to business were serious,” as remarked by your correspondent. The spot referred to was not so large as several which appeared during the two preceding years, but exceeded in magnitude any of those which have come under my observation during the present year. It disappeared from the sun's western edge on about the 21st of October; but just previously to this the spot had been considerably smaller, and showed indications of dissolution. The spots now visible on the solar surface are not very conspicuous; there are, however, two visible of the larger class—one of these is situated in the north-east quadrant, and the other in the south-east quadrant, and they are situate at about the same distances from the limb. Between these spots there were yesterday two small ones perceptible running parallel with the equator.

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  1. Bristol, Oct 28



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