Statistics of sunspot activity
September, 1993
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 | Average | % |
| W | 33.60 | 31.00 | 28.60 | 40.40 | 35.50 | 25.00 | 14.00 | 16.20 | 20.25 | 11.00 | 0.00 | 11.00 | 16.50 | 13.75 | 19.75 | 29.20 | 28.80 | 42.67 | 17.25 | 21.00 | 20.00 | 11.67 | 15.00 | 29.00 | 55.80 | 64.60 | 57.60 | 71.60 | 72.80 | 69.00 | 30.75 | 100 |
| Wn | 33.60 | 31.00 | 28.60 | 30.20 | 23.25 | 19.50 | 14.00 | 16.20 | 20.25 | 11.00 | 0.00 | 11.00 | 16.50 | 5.50 | 5.75 | 6.80 | 0.00 | 0.00 | 0.00 | 2.20 | 0.00 | 4.33 | 0.00 | 0.00 | 24.00 | 30.40 | 33.60 | 55.20 | 60.00 | 52.60 | 17.85 | 58.04 |
| Ws | 0.00 | 0.00 | 0.00 | 10.20 | 12.25 | 5.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 8.25 | 14.00 | 22.40 | 28.80 | 42.67 | 17.25 | 18.80 | 20.00 | 7.33 | 15.00 | 29.00 | 31.80 | 34.20 | 24.00 | 16.40 | 12.80 | 16.40 | 12.90 | 41.96 |
| n | 3.00 | 2.80 | 2.40 | 2.80 | 2.25 | 1.75 | 1.00 | 1.20 | 1.75 | 1.00 | 0.00 | 1.00 | 1.50 | 1.25 | 1.50 | 2.40 | 2.00 | 2.33 | 1.00 | 1.20 | 1.60 | 1.00 | 1.00 | 1.00 | 2.80 | 3.40 | 3.20 | 4.00 | 3.40 | 2.40 | 1.93 | 100 |
| A | 0.40 | 0.80 | 0.60 | 0.40 | 0.75 | 1.00 | 0.00 | 0.20 | 1.25 | 1.00 | 0.00 | 1.00 | 1.50 | 1.25 | 0.50 | 1.00 | 0.20 | 0.00 | 0.00 | 0.20 | 0.60 | 0.67 | 0.00 | 0.00 | 0.00 | 0.40 | 0.20 | 0.60 | 1.20 | 0.00 | 0.52 | 27.13 |
| B | 0.20 | 0.00 | 0.00 | 0.80 | 0.25 | 0.25 | 1.00 | 1.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.40 | 1.00 | 0.50 | 0.80 | 1.00 | 0.33 | 0.50 | 0.00 | 0.80 | 1.20 | 0.60 | 0.80 | 0.00 | 0.00 | 0.40 | 20.94 |
| C | 0.20 | 0.00 | 0.60 | 1.20 | 1.25 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.75 | 0.60 | 1.20 | 0.33 | 0.00 | 0.20 | 0.00 | 0.00 | 0.50 | 0.00 | 0.40 | 0.20 | 0.60 | 1.20 | 0.80 | 0.20 | 0.36 | 18.53 |
| D | 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 | 0.25 | 0.20 | 0.00 | 1.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.60 | 1.60 | 1.00 | 0.40 | 0.00 | 0.00 | 0.25 | 13.03 |
| 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 | 0.40 | 0.00 | 0.00 | 0.01 | 0.69 |
| 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 | 0.40 | 1.00 | 0.80 | 0.07 | 3.80 |
| 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 | 0.40 | 0.20 | 0.00 | 0.20 | 0.03 | 1.38 |
| 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 | 0.40 | 0.00 | 0.00 | 0.00 | 0.01 | 0.69 |
| I | 2.20 | 2.00 | 1.20 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 1.20 | 0.27 | 13.81 |
| x | 0.60 | 0.80 | 0.60 | 1.20 | 1.00 | 1.25 | 1.00 | 1.20 | 1.75 | 1.00 | 0.00 | 1.00 | 1.50 | 1.25 | 0.50 | 1.20 | 0.60 | 1.00 | 0.50 | 1.00 | 1.60 | 1.00 | 0.50 | 0.00 | 0.80 | 1.60 | 0.80 | 1.40 | 1.20 | 0.00 | 0.93 | 48.07 |
| r | 0.40 | 0.00 | 0.00 | 0.80 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.60 | 0.67 | 0.00 | 0.20 | 0.00 | 0.00 | 0.25 | 0.00 | 0.20 | 0.20 | 0.00 | 0.20 | 0.20 | 0.00 | 0.15 | 7.71 |
| s | 1.60 | 1.40 | 0.20 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.20 | 0.20 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.80 | 0.20 | 0.00 | 0.60 | 0.20 | 1.00 | 0.26 | 13.64 |
| a | 0.40 | 0.60 | 1.60 | 0.80 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 1.00 | 0.60 | 0.67 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.75 | 0.80 | 0.80 | 1.00 | 0.40 | 0.60 | 0.40 | 0.40 | 20.57 |
| 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 | 0.20 | 0.20 | 0.20 | 0.00 | 0.02 | 1.04 |
| 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 | 0.20 | 0.60 | 1.20 | 1.20 | 1.00 | 1.00 | 0.17 | 8.98 |
| x | 2.60 | 2.80 | 1.80 | 0.80 | 0.75 | 1.00 | 0.00 | 0.20 | 1.25 | 1.00 | 0.00 | 1.00 | 1.50 | 1.25 | 0.50 | 1.40 | 0.40 | 0.00 | 0.00 | 0.20 | 0.60 | 0.67 | 0.00 | 0.00 | 0.00 | 0.40 | 0.60 | 0.60 | 1.60 | 1.20 | 0.80 | 41.63 |
| o | 0.40 | 0.00 | 0.60 | 2.00 | 1.50 | 0.75 | 1.00 | 1.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 1.60 | 2.00 | 1.00 | 0.80 | 1.00 | 0.33 | 1.00 | 0.25 | 2.40 | 2.40 | 2.20 | 2.60 | 0.80 | 0.40 | 0.95 | 49.25 |
| i | 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 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.75 | 0.40 | 0.60 | 0.40 | 0.80 | 1.00 | 0.80 | 0.18 | 9.12 |
| 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 |
| CV | 21.40 | 19.00 | 14.40 | 12.00 | 10.50 | 5.50 | 2.00 | 2.20 | 2.25 | 1.00 | 0.00 | 1.00 | 1.50 | 1.25 | 12.00 | 14.00 | 10.80 | 21.67 | 12.00 | 3.00 | 2.60 | 1.33 | 5.00 | 22.75 | 44.80 | 51.60 | 74.80 | 80.20 | 65.60 | 60.40 | 19.22 | 100 |
| CVn | 21.40 | 19.00 | 14.40 | 9.80 | 6.75 | 5.00 | 2.00 | 2.20 | 2.25 | 1.00 | 0.00 | 1.00 | 1.50 | 0.50 | 0.50 | 2.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.67 | 0.00 | 0.00 | 18.60 | 16.20 | 41.60 | 56.20 | 51.40 | 47.40 | 10.72 | 55.77 |
| CVs | 0.00 | 0.00 | 0.00 | 2.20 | 3.75 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.75 | 11.50 | 12.00 | 10.80 | 21.67 | 12.00 | 2.80 | 2.60 | 0.67 | 5.00 | 22.75 | 26.20 | 35.40 | 33.20 | 24.00 | 14.20 | 13.00 | 8.50 | 44.23 |
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