Abstract
THE LARGE SUN-SPOT.—The spot on the solar disc which appeared on September 3 last at the eastern limb, and which, when on the central meridian (September 9), was the probable origin of the aurora and magnetic storm, has again (September 30) made its appearance on the eastern limb, having been of sufficient dimensions to last a period of rotation of the sun. The spot is accompanied by several others of smaller size, and its umbra is divided into three separate parts, which form objects of interesting observation. Even in one day considerable changes have been noted to have taken place in the smaller spots in its neighbourhood, although the large one has not shown any marked change. It will be interesting to know whether another aurora and concurrent magnetic storm will be observed and recorded when the spot reaches the central meridian (which will take place on October 6), as was the case at its last meridian passage.
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Our Astronomical Column. Nature 58, 553–554 (1898). https://doi.org/10.1038/058553a0
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DOI: https://doi.org/10.1038/058553a0