Geomagnetic activity and the sunspot cycle

dc.contributor.author	Ananthakrishnan, R
dc.date.accessioned	2009-06-16T16:19:10Z
dc.date.available	2009-06-16T16:19:10Z
dc.date.issued	1953-11
dc.identifier.citation	Nature, Vol. 172, No. 4384, pp. 854 – 855	en
dc.identifier.issn	0028-0836
dc.identifier.uri	http://hdl.handle.net/2248/4555
dc.description	Restricted Access
dc.description.abstract	It is well known that the daily international magnetic character figure Ci 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, Ci is in fact comparable to the Zurich relative sunspot number S, which is a recognized measure of solar activity. Daily Ci values are available in an unbroken sequence from 1884 onwards.	en
dc.language.iso	en	en
dc.publisher	Nature Publishing Group	en
dc.relation.uri	http://www.nature.com/doifinder/10.1038/172854a0	en
dc.subject	Geomagnetic Activity	en
dc.subject	Sunspot Cycle	en
dc.title	Geomagnetic activity and the sunspot cycle	en
dc.type	Article	en