Sunspot drawing of 1974-10-31

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https://doi.org/10.7891/e-manuscripta-97881



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1974-10-31
08:00
Hs 1304.5:5524
https://doi.org/10.7891/e-manuscripta-97881
Observer : Sergio Cortesi
Seeing (SIDC) : 3
Group Not Weighted Weighted Type Latitude Carrington Longit.
172 5 J -5.6 25.7
176 4 B -20.0 316.8
2 9