Ananthakrishnan, R. (1953) Geomagnetic activity and the sunspot cycle Nature, 172 . pp. 854-855. ISSN 0028-0836
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Official URL: http://www.nature.com/nature/journal/v172/n4384/ab...
Related URL: http://dx.doi.org/10.1038/172854a0
Abstract
It is well known that the daily international magnetic character figure C i constitutes a valuable index for classifying days according to their magnetic activity averaged over a large part of the earth. As a measure of the intensity of geomagnetic disturbance, C i is in fact comparable to the Zurich relative sunspot number S, which is a recognized measure of solar activity. Daily C i values are available in an unbroken sequence from 1884 onwards.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Nature Publishing Group. |
| ID Code: | 1994 |
| Deposited On: | 08 Oct 2010 09:35 |
| Last Modified: | 12 May 2011 10:20 |
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