Articles | Volume 23, issue 5
https://doi.org/10.5194/angeo-23-1959-2005
https://doi.org/10.5194/angeo-23-1959-2005
28 Jul 2005
 | 28 Jul 2005

Letter to the Editor
On the use of the sunspot number for the estimation of past solar and upper atmosphere conditions from historical and modern auroral observations

J. M Vaquero

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