Statistics of sunspot activity
Solar activity in 2004
Visual indices of solar activity by National Geophysical Data Center
  | Average by |
monthIIIIII
IVVVI
VIIVIIIIX
XXIXIIdaysmonths | | | | | | | | | | | | | | |
N | 31 | 29 | 31 | 30 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 31 | 30.50 | 30.50 |
W | 57.43 | 68.20 | 72.91 | 53.42 | 67.91 | 70.62 | 75.10 | 63.98 | 43.52 | 71.75 | 63.31 | 30.01 | 61.52 | 61.51 |
Wn | 18.92 | 26.54 | 22.05 | 10.97 | 10.13 | 18.87 | 38.28 | 26.36 | 14.95 | 31.52 | 27.53 | 10.85 | 21.42 | 21.41 |
Ws | 38.52 | 41.66 | 50.86 | 42.45 | 57.78 | 51.75 | 36.82 | 37.61 | 28.57 | 40.23 | 35.78 | 19.15 | 40.10 | 40.10 |
n | 2.98 | 3.98 | 3.94 | 3.32 | 3.91 | 3.74 | 3.41 | 3.13 | 2.49 | 4.24 | 3.60 | 1.96 | 3.39 | 3.39 |
A | 0.24 | 0.72 | 0.42 | 0.37 | 0.34 | 0.81 | 0.30 | 0.21 | 0.23 | 0.41 | 0.33 | 0.35 | 0.40 | 0.39 |
B | 0.20 | 0.39 | 0.34 | 0.42 | 0.43 | 0.65 | 0.39 | 0.17 | 0.10 | 0.40 | 0.13 | 0.13 | 0.31 | 0.31 |
C | 0.65 | 0.72 | 0.60 | 0.72 | 0.82 | 0.67 | 0.76 | 0.42 | 0.37 | 0.69 | 0.58 | 0.41 | 0.62 | 0.62 |
D | 0.94 | 1.05 | 0.81 | 0.74 | 0.83 | 0.28 | 0.78 | 0.66 | 0.61 | 0.94 | 0.94 | 0.46 | 0.75 | 0.75 |
E | 0.22 | 0.28 | 0.26 | 0.08 | 0.10 | 0.10 | 0.16 | 0.27 | 0.13 | 0.33 | 0.29 | 0.07 | 0.19 | 0.19 |
F | 0.01 | 0.00 | 0.05 | 0.00 | 0.15 | 0.34 | 0.41 | 0.20 | 0.01 | 0.02 | 0.14 | 0.05 | 0.12 | 0.11 |
G | 0.29 | 0.20 | 0.53 | 0.11 | 0.11 | 0.22 | 0.10 | 0.42 | 0.07 | 0.12 | 0.15 | 0.01 | 0.19 | 0.19 |
H | 0.06 | 0.00 | 0.07 | 0.02 | 0.13 | 0.03 | 0.02 | 0.01 | 0.21 | 0.01 | 0.04 | 0.02 | 0.05 | 0.05 |
I | 0.37 | 0.63 | 0.87 | 0.87 | 1.00 | 0.64 | 0.51 | 0.77 | 0.76 | 1.31 | 1.00 | 0.47 | 0.77 | 0.77 |
x | 0.44 | 1.10 | 0.76 | 0.78 | 0.77 | 1.46 | 0.69 | 0.38 | 0.33 | 0.82 | 0.47 | 0.48 | 0.70 | 0.71 |
r | 0.14 | 0.36 | 0.15 | 0.13 | 0.10 | 0.12 | 0.10 | 0.10 | 0.13 | 0.07 | 0.17 | 0.10 | 0.14 | 0.14 |
s | 1.14 | 1.12 | 1.32 | 1.20 | 1.19 | 0.79 | 1.05 | 0.97 | 0.69 | 1.60 | 1.03 | 0.61 | 1.06 | 1.06 |
a | 0.77 | 1.08 | 1.26 | 1.04 | 1.50 | 0.82 | 1.12 | 1.07 | 0.98 | 1.48 | 1.52 | 0.72 | 1.11 | 1.11 |
h | 0.04 | 0.08 | 0.15 | 0.02 | 0.05 | 0.06 | 0.04 | 0.10 | 0.16 | 0.07 | 0.01 | 0.01 | 0.06 | 0.06 |
k | 0.46 | 0.23 | 0.30 | 0.15 | 0.31 | 0.50 | 0.42 | 0.51 | 0.20 | 0.20 | 0.41 | 0.05 | 0.31 | 0.31 |
x | 0.67 | 1.35 | 1.36 | 1.25 | 1.47 | 1.48 | 0.82 | 0.99 | 1.20 | 1.74 | 1.37 | 0.83 | 1.21 | 1.21 |
o | 1.58 | 1.93 | 1.88 | 1.71 | 1.93 | 1.65 | 1.78 | 1.55 | 0.80 | 1.89 | 1.37 | 0.75 | 1.57 | 1.57 |
i | 0.56 | 0.56 | 0.54 | 0.35 | 0.34 | 0.51 | 0.37 | 0.25 | 0.43 | 0.51 | 0.51 | 0.31 | 0.44 | 0.44 |
c | 0.17 | 0.14 | 0.16 | 0.01 | 0.18 | 0.11 | 0.44 | 0.34 | 0.06 | 0.10 | 0.35 | 0.07 | 0.17 | 0.18 |
CV | 58.12 | 55.43 | 65.14 | 40.63 | 56.03 | 50.44 | 60.87 | 63.61 | 40.62 | 58.70 | 61.32 | 23.92 | 52.95 | 52.90 |
CVn | 17.49 | 20.41 | 19.02 | 8.69 | 7.71 | 16.98 | 36.50 | 31.78 | 8.66 | 24.10 | 26.50 | 10.18 | 19.04 | 19.00 |
CVs | 40.63 | 35.03 | 46.11 | 31.94 | 48.32 | 33.45 | 24.37 | 31.83 | 31.96 | 34.60 | 34.82 | 13.74 | 33.91 | 33.90 |
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