The Recurrence of Magnetic Storms

Abstract

IN recent communications to the French Academy of Sciences Prof. H. Deslandres (see NATURE, vol. 118, p. 71), the distinguished director of the Meudon Observatory, has described a tendency in magnetic storms to follow one another at intervals iT/6, where i is integral, T being the rotation period shown by sunspots. It is now, I think, generally agreed that there is a tendency to a repetition in magnetic conditions, whether disturbed or quiet, in what is described for brevity as the 27-day interval. Investigations (Phil. Trans. A, vol. 212, p. 75, and A, vol. 213, p. 245) which I made in 1912 and 1913 showed a tendency to recurrence in intervals which were multiples of T, but in none shorter. Supposing in accordance with modern ideas, as seems to have been first suggested by Kr. Birkeland, that magnetic storms are due to the discharge of ions from the sun, if such discharge, whether from sunspots or other approximately fixed limited areas, went on for a long time, a repetition of disturbance according to the solar rotation period is exactly what we should expect. But repetition at intervals submultiples of T would suggest a different explanation, namely, that the sun as a whole acts somewhat like an intermittent geyser. The subject seemed so important both to magneticians and astronomers that I have further considered it.

Access options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

Author information

Affiliations

Authors

Rights and permissions

Reprints and Permissions

About this article

Cite this article

CHREE, C. The Recurrence of Magnetic Storms. Nature 118, 335–336 (1926). https://doi.org/10.1038/118335a0

Download citation

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.