2814 2815 2813
2816
Beta
2817
Beta
86
86
  • Area = 8
  • Zurich = D
  • Penumbra = small symmetric (s) north to south diameter < 2.5
  • Leading = 4
  • NN = 13
87
87
  • Area = 10
  • Zurich = D
  • Penumbra = small symmetric (s) north to south diameter < 2.5
  • Leading = 5
  • NN = 10
88
88
  • Area = 1
  • Zurich = A
  • Penumbra = no penumbra (Zurich class A or B)
  • Leading =
  • NN = 1
89
89
  • Area = 2
  • Zurich = H
  • Penumbra = small symmetric (s) north to south diameter < 2.5
  • Leading =
  • NN = 1

Catania sunspot groups
2021-04-20 07:30:00
NOAA AR/sunspot
NOAA Halpha plage
NOAA expected region
2021-04-20 00:30:00
PROBA2/SWAP 17.4nm
2021-04-20T09:35:40.702