Statistics of sunspot activity
October, 1997
Visual indices of solar activity by National Geophysical Data Center
| Date | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | Average | % |
| W | 33.00 | 25.75 | 26.75 | 26.25 | 27.67 | 23.25 | 23.00 | 15.67 | 26.00 | 33.33 | 31.50 | 40.50 | 38.67 | 36.67 | 40.25 | 44.00 | 50.75 | 44.00 | 29.00 | 25.75 | 26.00 | 20.67 | 11.00 | 11.00 | 12.67 | 14.00 | 35.75 | 47.00 | 40.33 | 51.00 | 51.00 | 31.04 | 100 |
| Wn | 10.50 | 14.75 | 15.75 | 15.25 | 15.00 | 12.00 | 14.75 | 15.67 | 26.00 | 33.33 | 31.50 | 40.50 | 38.67 | 36.67 | 40.25 | 44.00 | 50.75 | 44.00 | 29.00 | 25.75 | 26.00 | 16.33 | 0.00 | 0.00 | 12.67 | 14.00 | 15.75 | 19.67 | 15.67 | 19.67 | 17.67 | 22.95 | 73.95 |
| Ws | 22.50 | 11.00 | 11.00 | 11.00 | 12.67 | 11.25 | 8.25 | 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 | 4.33 | 11.00 | 11.00 | 0.00 | 0.00 | 20.00 | 27.33 | 24.67 | 31.33 | 33.33 | 8.09 | 26.05 |
| n | 2.75 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 1.00 | 2.00 | 2.33 | 2.00 | 2.50 | 2.33 | 2.33 | 2.50 | 3.00 | 3.00 | 3.00 | 2.33 | 2.00 | 2.00 | 1.67 | 1.00 | 1.00 | 1.00 | 1.00 | 2.50 | 2.67 | 2.00 | 2.00 | 2.67 | 2.08 | 100 |
| A | 0.25 | 0.00 | 0.25 | 0.00 | 0.33 | 0.25 | 1.50 | 0.00 | 0.25 | 0.33 | 0.00 | 0.75 | 0.33 | 0.67 | 0.00 | 0.25 | 0.00 | 0.00 | 0.33 | 0.25 | 0.00 | 0.33 | 1.00 | 1.00 | 0.00 | 0.00 | 0.25 | 0.33 | 0.00 | 0.00 | 0.67 | 0.30 | 14.45 |
| B | 0.50 | 0.25 | 0.25 | 0.00 | 0.33 | 0.75 | 0.50 | 0.67 | 1.75 | 1.33 | 1.00 | 0.50 | 0.67 | 0.67 | 0.25 | 0.25 | 1.25 | 0.67 | 0.00 | 0.00 | 0.75 | 1.00 | 0.00 | 0.00 | 0.67 | 0.00 | 1.00 | 0.33 | 0.67 | 0.33 | 0.33 | 0.54 | 25.81 |
| C | 0.25 | 0.75 | 0.50 | 1.00 | 0.67 | 0.00 | 0.00 | 0.33 | 0.00 | 0.33 | 0.50 | 0.25 | 0.33 | 0.00 | 1.50 | 1.75 | 1.00 | 1.67 | 1.00 | 0.75 | 0.50 | 0.00 | 0.00 | 0.00 | 0.33 | 1.00 | 1.25 | 1.67 | 0.67 | 0.67 | 0.67 | 0.62 | 29.94 |
| D | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.50 | 1.00 | 1.00 | 1.00 | 0.25 | 0.75 | 0.75 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.67 | 0.33 | 0.26 | 12.65 |
| E | 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 | 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 | 0.00 | 0.00 | 0.33 | 0.01 | 0.52 |
| 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 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| G | 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 | 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 | 0.33 | 0.33 | 0.33 | 0.03 | 1.55 |
| 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 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| I | 1.75 | 1.00 | 0.75 | 1.00 | 0.67 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 0.75 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.31 | 15.10 |
| x | 0.75 | 0.25 | 0.50 | 0.00 | 0.67 | 1.00 | 2.00 | 0.67 | 2.00 | 1.67 | 1.00 | 1.25 | 1.00 | 1.33 | 0.25 | 0.50 | 1.25 | 0.67 | 0.33 | 0.25 | 0.75 | 1.33 | 1.00 | 1.00 | 0.67 | 0.00 | 1.25 | 0.67 | 0.67 | 0.33 | 1.00 | 0.84 | 40.26 |
| r | 0.00 | 0.50 | 0.00 | 0.75 | 0.67 | 0.75 | 0.00 | 0.00 | 0.00 | 0.33 | 0.50 | 0.25 | 0.33 | 0.00 | 0.25 | 0.25 | 0.25 | 0.00 | 0.33 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.33 | 0.50 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.22 | 10.71 |
| s | 1.50 | 0.75 | 1.25 | 1.25 | 0.67 | 0.25 | 0.00 | 0.33 | 0.00 | 0.33 | 0.50 | 0.50 | 0.33 | 0.33 | 1.25 | 2.00 | 1.25 | 2.00 | 1.33 | 1.00 | 0.50 | 0.33 | 0.00 | 0.00 | 0.00 | 0.25 | 1.25 | 1.00 | 0.33 | 0.33 | 0.33 | 0.68 | 32.77 |
| a | 0.50 | 0.50 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.67 | 0.67 | 0.75 | 0.25 | 0.25 | 0.33 | 0.33 | 0.75 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 1.00 | 0.67 | 0.67 | 0.00 | 0.28 | 13.68 |
| 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 | 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 | 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 | 0.00 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 1.00 | 0.05 | 2.58 |
| x | 2.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.25 | 1.50 | 0.00 | 0.25 | 0.33 | 0.00 | 0.75 | 0.33 | 0.67 | 0.50 | 0.25 | 0.00 | 0.00 | 1.33 | 1.25 | 0.75 | 0.67 | 1.00 | 1.00 | 0.00 | 0.00 | 0.25 | 0.33 | 0.00 | 0.00 | 0.67 | 0.62 | 29.55 |
| o | 0.75 | 1.00 | 1.00 | 1.00 | 1.00 | 0.75 | 0.50 | 1.00 | 1.75 | 2.00 | 2.00 | 1.25 | 2.00 | 1.67 | 2.00 | 2.75 | 3.00 | 3.00 | 1.00 | 0.75 | 1.25 | 1.00 | 0.00 | 0.00 | 1.00 | 1.00 | 2.25 | 2.33 | 1.67 | 2.00 | 1.33 | 1.42 | 68.13 |
| i | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 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 | 0.00 | 0.00 | 0.33 | 0.00 | 0.67 | 0.05 | 2.32 |
| c | 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 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| CV | 20.00 | 14.25 | 18.50 | 16.50 | 11.00 | 7.25 | 2.50 | 5.00 | 3.75 | 13.00 | 15.50 | 26.50 | 24.33 | 23.00 | 23.75 | 36.50 | 30.00 | 34.33 | 18.33 | 16.25 | 11.50 | 5.67 | 1.00 | 1.00 | 3.00 | 7.25 | 16.00 | 24.67 | 29.67 | 33.33 | 52.33 | 17.60 | 100 |
| CVn | 1.25 | 5.00 | 10.75 | 8.00 | 5.67 | 2.50 | 1.75 | 5.00 | 3.75 | 13.00 | 15.50 | 26.50 | 24.33 | 23.00 | 23.75 | 36.50 | 30.00 | 34.33 | 18.33 | 16.25 | 11.50 | 5.00 | 0.00 | 0.00 | 3.00 | 7.25 | 11.00 | 14.67 | 5.00 | 6.00 | 6.00 | 12.08 | 68.65 |
| CVs | 18.75 | 9.25 | 7.75 | 8.50 | 5.33 | 4.75 | 0.75 | 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 | 0.67 | 1.00 | 1.00 | 0.00 | 0.00 | 5.00 | 10.00 | 24.67 | 27.33 | 46.33 | 5.52 | 31.35 |
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