2698
2699
Alpha
72
72
  • Area = 3
  • Zurich = C
  • Penumbra = small symmetric (s) north to south diameter < 2.5
  • Leading = 1
  • NN = 6

Catania sunspot groups
2018-02-16 07:36:00
NOAA AR/sunspot
NOAA Halpha plage
NOAA expected region
2018-02-17 00:30:00
PROBA2/SWAP 17.4nm
2018-02-18T01:41:09.932