Statistics of sunspot activity
Solar activity in 1997
Visual indices of solar activity by author's observations
| | Average by |
monthIIIIII
IVVVI
VIIVIIIIX
XXIXIIdays| months | | | | | | | | | | | | | | |
| N | 15 | 11 | 9 | 17 | 21 | 26 | 29 | 21 | 18 | 15 | 7 | 3 | 16.00 | 16.00 |
| W | 2.60 | 5.45 | 9.67 | 11.18 | 23.19 | 16.42 | 7.86 | 19.10 | 45.56 | 26.13 | 44.86 | 26.00 | 18.35 | 19.83 |
| Wn | 1.67 | 2.64 | 5.67 | 0.00 | 16.33 | 10.77 | 7.00 | 17.38 | 20.28 | 18.47 | 30.71 | 26.00 | 11.62 | 13.08 |
| Ws | 0.93 | 2.82 | 4.00 | 11.18 | 6.86 | 5.65 | 0.86 | 1.71 | 25.28 | 7.67 | 14.14 | 0.00 | 6.73 | 6.76 |
| n | 0.20 | 0.36 | 0.78 | 0.76 | 1.71 | 1.08 | 0.55 | 1.14 | 2.33 | 1.73 | 2.43 | 1.00 | 1.14 | 1.17 |
| A | 0.00 | 0.00 | 0.11 | 0.00 | 0.10 | 0.04 | 0.21 | 0.10 | 0.00 | 0.00 | 0.14 | 0.00 | 0.07 | 0.06 |
| B | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.04 | 0.00 | 0.00 | 0.00 | 0.13 | 0.00 | 0.00 | 0.03 | 0.02 |
| C | 0.13 | 0.09 | 0.22 | 0.29 | 0.33 | 0.15 | 0.03 | 0.19 | 0.17 | 0.47 | 0.57 | 0.00 | 0.21 | 0.22 |
| D | 0.07 | 0.18 | 0.00 | 0.41 | 0.48 | 0.46 | 0.28 | 0.24 | 0.78 | 0.40 | 0.29 | 0.00 | 0.35 | 0.30 |
| E | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.56 | 0.07 | 0.86 | 1.00 | 0.11 | 0.22 |
| F | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.11 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 |
| G | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.00 | 0.00 | 0.00 | 0.22 | 0.00 | 0.14 | 0.00 | 0.04 | 0.04 |
| H | 0.00 | 0.00 | 0.11 | 0.00 | 0.29 | 0.00 | 0.00 | 0.38 | 0.11 | 0.00 | 0.14 | 0.00 | 0.09 | 0.09 |
| I | 0.00 | 0.09 | 0.33 | 0.06 | 0.33 | 0.38 | 0.03 | 0.14 | 0.39 | 0.67 | 0.29 | 0.00 | 0.23 | 0.23 |
| x | 0.00 | 0.00 | 0.11 | 0.00 | 0.19 | 0.08 | 0.21 | 0.10 | 0.00 | 0.13 | 0.14 | 0.00 | 0.09 | 0.08 |
| r | 0.13 | 0.18 | 0.22 | 0.29 | 0.67 | 0.50 | 0.00 | 0.05 | 0.11 | 0.40 | 0.86 | 0.00 | 0.28 | 0.28 |
| s | 0.07 | 0.18 | 0.44 | 0.29 | 0.52 | 0.19 | 0.21 | 0.62 | 0.44 | 0.20 | 0.14 | 0.00 | 0.31 | 0.28 |
| a | 0.00 | 0.00 | 0.00 | 0.18 | 0.33 | 0.31 | 0.14 | 0.38 | 1.44 | 1.00 | 1.00 | 0.00 | 0.41 | 0.40 |
| 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 |
| k | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.29 | 1.00 | 0.06 | 0.14 |
| x | 0.00 | 0.09 | 0.56 | 0.06 | 0.71 | 0.42 | 0.24 | 0.62 | 0.50 | 0.67 | 0.57 | 0.00 | 0.40 | 0.37 |
| o | 0.20 | 0.09 | 0.22 | 0.35 | 0.90 | 0.35 | 0.14 | 0.24 | 0.56 | 0.73 | 0.71 | 0.00 | 0.39 | 0.37 |
| i | 0.00 | 0.18 | 0.00 | 0.35 | 0.10 | 0.31 | 0.17 | 0.14 | 0.89 | 0.27 | 1.14 | 0.67 | 0.29 | 0.35 |
| c | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.39 | 0.07 | 0.00 | 0.33 | 0.06 | 0.08 |
| CV | 1.93 | 5.18 | 5.33 | 11.59 | 17.57 | 12.77 | 7.72 | 15.57 | 54.50 | 18.60 | 41.00 | 50.00 | 17.08 | 20.15 |
| CVn | 1.07 | 2.82 | 3.89 | 0.00 | 14.00 | 6.12 | 7.41 | 14.67 | 20.67 | 11.87 | 35.29 | 50.00 | 10.44 | 13.98 |
| CVs | 0.87 | 2.36 | 1.44 | 11.59 | 3.57 | 6.65 | 0.31 | 0.90 | 33.83 | 6.73 | 5.71 | 0.00 | 6.64 | 6.16 |
| gr | 0.20 | 0.27 | 0.60 | 0.59 | 1.24 | 0.85 | 0.38 | 0.71 | 2.06 | 1.47 | 1.86 | 1.00 | 0.89 | 0.94 |
| grfp | 0.33 | 0.63 | 1.40 | 1.47 | 4.29 | 3.19 | 1.45 | 4.48 | 15.72 | 5.80 | 14.29 | 11.00 | 4.47 | 5.34 |
| grf | 0.27 | 1.09 | 1.10 | 1.88 | 1.81 | 2.19 | 0.76 | 2.76 | 6.22 | 2.73 | 5.71 | 5.00 | 2.29 | 2.63 |
| efp | 0.00 | 0.09 | 0.10 | 0.12 | 0.38 | 0.19 | 0.00 | 0.33 | 0.28 | 0.27 | 0.43 | 0.00 | 0.19 | 0.18 |
| ef | 0.00 | 0.00 | 0.10 | 0.06 | 0.05 | 0.08 | 0.21 | 0.10 | 0.00 | 0.00 | 0.14 | 0.00 | 0.07 | 0.06 |
| Cond | 2.67 | 2.55 | 2.60 | 2.59 | 2.10 | 2.23 | 2.22 | 2.14 | 2.81 | 2.80 | 2.35 | 3.50 | 2.43 | 2.55 |
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