Sunspot drawing of 1974-2-4

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https://doi.org/10.7891/e-manuscripta-97762



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1974-02-04
09:15
Hs 1304.5:5290
https://doi.org/10.7891/e-manuscripta-97762
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
13 2 A -7.3 6.0
1 2