Statistics of sunspot activity
Solar activity in 2009
Visual indices of solar activity by National Geophysical Data Center
| | Average by |
monthIIIIII
IVVVI
VIIVIIIIX
XXIXIIdays| months | | | | | | | | | | | | | | |
| N | 31 | 28 | 31 | 30 | 31 | 30 | 31 | 31 | 30 | 31 | 30 | 31 | 30.42 | 30.42 |
| W | 4.31 | 2.99 | 2.69 | 1.61 | 4.70 | 7.01 | 6.23 | 0.42 | 8.33 | 9.27 | 9.45 | 15.05 | 6.02 | 6.00 |
| Wn | 2.44 | 1.28 | 1.90 | 0.73 | 3.75 | 4.19 | 0.35 | 0.42 | 5.62 | 7.85 | 8.35 | 9.52 | 3.88 | 3.87 |
| Ws | 1.87 | 1.70 | 0.78 | 0.88 | 0.96 | 2.82 | 5.87 | 0.00 | 2.71 | 1.42 | 1.10 | 5.53 | 2.15 | 2.14 |
| n | 0.32 | 0.26 | 0.23 | 0.13 | 0.37 | 0.52 | 0.36 | 0.03 | 0.62 | 0.56 | 0.72 | 0.97 | 0.42 | 0.42 |
| A | 0.17 | 0.20 | 0.13 | 0.08 | 0.10 | 0.10 | 0.08 | 0.00 | 0.21 | 0.26 | 0.30 | 0.06 | 0.14 | 0.14 |
| B | 0.13 | 0.05 | 0.09 | 0.00 | 0.19 | 0.22 | 0.05 | 0.00 | 0.13 | 0.06 | 0.35 | 0.40 | 0.15 | 0.14 |
| C | 0.02 | 0.01 | 0.01 | 0.03 | 0.02 | 0.08 | 0.03 | 0.03 | 0.09 | 0.06 | 0.05 | 0.10 | 0.05 | 0.04 |
| D | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.14 | 0.00 | 0.10 | 0.17 | 0.02 | 0.23 | 0.06 | 0.06 |
| E | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.11 | 0.01 | 0.01 |
| F | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| G | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.00 | 0.00 | 0.01 | 0.00 | 0.06 | 0.01 | 0.01 |
| H | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| I | 0.00 | 0.00 | 0.00 | 0.02 | 0.06 | 0.07 | 0.00 | 0.00 | 0.09 | 0.00 | 0.00 | 0.00 | 0.02 | 0.02 |
| x | 0.30 | 0.25 | 0.22 | 0.08 | 0.29 | 0.32 | 0.13 | 0.00 | 0.34 | 0.33 | 0.65 | 0.47 | 0.28 | 0.28 |
| r | 0.00 | 0.00 | 0.01 | 0.01 | 0.06 | 0.09 | 0.01 | 0.03 | 0.02 | 0.02 | 0.07 | 0.06 | 0.03 | 0.03 |
| s | 0.01 | 0.01 | 0.00 | 0.01 | 0.02 | 0.07 | 0.12 | 0.00 | 0.07 | 0.05 | 0.00 | 0.19 | 0.05 | 0.05 |
| a | 0.02 | 0.00 | 0.00 | 0.03 | 0.00 | 0.05 | 0.10 | 0.00 | 0.19 | 0.13 | 0.00 | 0.19 | 0.06 | 0.06 |
| h | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | 0.05 | 0.01 | 0.00 |
| k | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | 0.01 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 |
| x | 0.17 | 0.20 | 0.13 | 0.10 | 0.16 | 0.17 | 0.08 | 0.00 | 0.30 | 0.26 | 0.30 | 0.06 | 0.16 | 0.16 |
| o | 0.14 | 0.07 | 0.10 | 0.03 | 0.21 | 0.31 | 0.16 | 0.03 | 0.26 | 0.12 | 0.27 | 0.69 | 0.20 | 0.20 |
| i | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.12 | 0.00 | 0.06 | 0.16 | 0.15 | 0.15 | 0.06 | 0.06 |
| c | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.02 | 0.00 | 0.06 | 0.01 | 0.01 |
| CV | 0.76 | 0.43 | 0.35 | 0.47 | 0.92 | 2.58 | 5.44 | 0.16 | 4.29 | 5.93 | 1.65 | 12.77 | 3.01 | 2.98 |
| CVn | 0.46 | 0.28 | 0.19 | 0.07 | 0.68 | 1.30 | 0.03 | 0.16 | 3.08 | 5.81 | 1.55 | 8.23 | 1.84 | 1.82 |
| CVs | 0.31 | 0.15 | 0.15 | 0.40 | 0.24 | 1.28 | 5.41 | 0.00 | 1.21 | 0.13 | 0.10 | 4.55 | 1.18 | 1.16 |
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