Statistics of sunspot activity
September, 1988
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 | 152.67 | 137.29 | 143.71 | 167.86 | 146.50 | 114.00 | 110.00 | 96.00 | 91.50 | 93.00 | 101.40 | 94.67 | 105.67 | 104.00 | 109.20 | 126.71 | 116.67 | 107.57 | 117.71 | 155.00 | 201.67 | 157.14 | 203.33 | 184.43 | 171.43 | 172.00 | 151.00 | 167.67 | 117.17 | 124.00 | 134.70 | 100 |
| Wn | 59.67 | 48.29 | 61.71 | 78.71 | 65.83 | 49.83 | 57.86 | 51.67 | 44.67 | 61.29 | 49.60 | 43.17 | 59.17 | 55.83 | 58.60 | 63.86 | 46.83 | 49.29 | 47.43 | 85.00 | 119.67 | 83.00 | 123.67 | 129.43 | 127.43 | 118.57 | 92.00 | 119.83 | 83.83 | 95.60 | 74.38 | 55.22 |
| Ws | 93.00 | 89.00 | 82.00 | 89.14 | 80.67 | 64.17 | 52.14 | 44.33 | 46.83 | 31.71 | 51.80 | 51.50 | 46.50 | 48.17 | 50.60 | 62.86 | 69.83 | 58.29 | 70.29 | 70.00 | 82.00 | 74.14 | 79.67 | 55.00 | 44.00 | 53.43 | 59.00 | 47.83 | 33.33 | 28.40 | 60.32 | 44.78 |
| n | 6.00 | 5.14 | 6.43 | 8.14 | 8.50 | 7.67 | 7.71 | 7.33 | 6.33 | 7.00 | 7.60 | 7.00 | 7.50 | 7.17 | 7.20 | 8.57 | 7.83 | 6.00 | 7.71 | 10.83 | 13.33 | 9.14 | 11.17 | 10.43 | 9.57 | 9.29 | 8.33 | 8.83 | 6.17 | 5.80 | 7.99 | 100 |
| A | 1.17 | 0.71 | 1.43 | 1.71 | 1.33 | 3.50 | 2.57 | 2.00 | 0.83 | 1.00 | 0.40 | 1.83 | 1.83 | 1.50 | 1.20 | 2.14 | 1.33 | 0.86 | 1.29 | 1.33 | 3.50 | 1.71 | 1.50 | 0.86 | 1.14 | 0.71 | 0.50 | 2.33 | 0.33 | 0.80 | 1.45 | 18.09 |
| B | 0.83 | 0.43 | 1.43 | 2.00 | 1.33 | 1.00 | 1.00 | 1.50 | 1.83 | 2.29 | 2.40 | 2.00 | 1.50 | 1.67 | 2.20 | 3.43 | 2.17 | 0.71 | 2.14 | 2.17 | 4.67 | 1.71 | 3.33 | 3.00 | 1.43 | 1.00 | 2.00 | 2.17 | 2.00 | 2.00 | 1.91 | 23.92 |
| C | 1.17 | 1.57 | 0.71 | 1.57 | 3.33 | 0.33 | 1.00 | 1.33 | 1.83 | 2.00 | 2.80 | 1.50 | 1.33 | 1.17 | 1.20 | 0.57 | 2.00 | 1.71 | 1.29 | 2.83 | 2.83 | 1.57 | 2.00 | 1.86 | 1.86 | 1.43 | 1.50 | 1.50 | 1.17 | 0.60 | 1.59 | 19.84 |
| D | 0.83 | 0.14 | 0.29 | 0.14 | 0.67 | 0.83 | 1.14 | 0.50 | 0.17 | 0.57 | 1.00 | 1.00 | 1.83 | 1.67 | 1.60 | 1.86 | 2.00 | 1.00 | 0.71 | 1.67 | 0.50 | 2.14 | 3.17 | 4.00 | 4.00 | 3.71 | 2.83 | 0.83 | 0.67 | 0.60 | 1.40 | 17.55 |
| E | 1.67 | 1.71 | 1.29 | 0.71 | 1.00 | 0.17 | 0.57 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.43 | 0.29 | 0.17 | 0.00 | 0.14 | 0.17 | 0.14 | 0.43 | 0.57 | 0.17 | 1.00 | 1.00 | 0.60 | 0.41 | 5.10 |
| F | 0.00 | 0.00 | 0.14 | 0.29 | 0.00 | 0.17 | 0.00 | 0.00 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.40 | 0.05 | 0.62 |
| G | 0.17 | 0.43 | 0.43 | 0.43 | 0.00 | 0.67 | 0.43 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.14 | 1.57 | 0.83 | 0.67 | 0.71 | 0.50 | 0.14 | 0.00 | 0.14 | 0.17 | 0.00 | 0.33 | 0.40 | 0.32 | 3.96 |
| H | 0.00 | 0.00 | 0.00 | 0.29 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | 0.29 | 0.50 | 0.00 | 0.00 | 0.20 | 0.08 | 0.97 |
| I | 0.17 | 0.14 | 0.71 | 1.00 | 0.67 | 1.00 | 1.00 | 1.67 | 1.67 | 1.14 | 0.80 | 0.67 | 1.00 | 1.17 | 0.80 | 0.57 | 0.33 | 0.14 | 0.43 | 1.17 | 1.17 | 1.14 | 0.50 | 0.29 | 0.71 | 1.43 | 0.67 | 1.00 | 0.50 | 0.20 | 0.79 | 9.95 |
| x | 2.00 | 1.14 | 2.86 | 3.71 | 2.67 | 4.50 | 3.57 | 3.50 | 2.67 | 3.29 | 2.80 | 3.83 | 3.33 | 3.17 | 3.40 | 5.57 | 3.50 | 1.57 | 3.43 | 3.50 | 8.17 | 3.43 | 4.83 | 3.86 | 2.57 | 1.71 | 2.50 | 4.50 | 2.33 | 2.80 | 3.36 | 42.01 |
| r | 0.00 | 0.29 | 0.29 | 1.00 | 1.33 | 0.67 | 0.86 | 0.50 | 0.67 | 0.71 | 1.20 | 0.17 | 1.00 | 0.33 | 0.60 | 0.00 | 0.17 | 0.29 | 0.43 | 2.67 | 1.33 | 0.14 | 1.17 | 0.71 | 0.86 | 0.86 | 0.33 | 0.33 | 0.33 | 0.00 | 0.64 | 8.02 |
| s | 0.67 | 0.43 | 0.29 | 1.57 | 2.83 | 1.00 | 1.00 | 1.67 | 1.83 | 1.86 | 2.40 | 1.17 | 2.17 | 2.00 | 0.40 | 1.43 | 2.50 | 1.43 | 2.29 | 1.83 | 2.83 | 3.00 | 1.83 | 1.86 | 2.71 | 3.43 | 2.17 | 1.83 | 2.00 | 1.00 | 1.78 | 22.28 |
| a | 0.83 | 1.00 | 1.14 | 0.57 | 0.50 | 0.83 | 1.86 | 1.50 | 1.17 | 1.14 | 0.80 | 1.50 | 0.67 | 1.50 | 1.60 | 1.43 | 1.67 | 2.71 | 1.57 | 2.17 | 0.67 | 1.57 | 3.17 | 3.57 | 3.00 | 2.86 | 2.17 | 1.17 | 0.33 | 0.60 | 1.51 | 18.88 |
| h | 0.00 | 0.00 | 0.29 | 0.29 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.00 | 0.00 | 0.17 | 0.80 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.14 | 0.00 | 0.43 | 0.29 | 0.14 | 0.17 | 0.00 | 0.17 | 0.40 | 0.15 | 1.88 |
| k | 2.50 | 2.29 | 1.57 | 1.00 | 1.00 | 0.67 | 0.43 | 0.17 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.40 | 0.14 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.86 | 0.17 | 0.00 | 0.14 | 0.29 | 1.00 | 1.00 | 1.00 | 1.00 | 0.55 | 6.93 |
| x | 1.33 | 0.86 | 2.14 | 3.00 | 2.17 | 4.50 | 3.57 | 3.67 | 2.50 | 2.14 | 1.40 | 2.50 | 2.83 | 2.67 | 2.20 | 2.71 | 1.67 | 1.00 | 1.71 | 2.83 | 4.67 | 2.86 | 2.00 | 1.29 | 1.86 | 2.43 | 1.67 | 3.33 | 0.83 | 1.20 | 2.32 | 29.01 |
| o | 2.67 | 2.57 | 2.71 | 4.00 | 5.33 | 2.83 | 3.57 | 3.67 | 3.50 | 4.29 | 6.20 | 4.50 | 4.67 | 4.33 | 4.00 | 5.14 | 6.00 | 4.29 | 5.29 | 7.17 | 8.17 | 5.57 | 8.17 | 8.00 | 6.29 | 4.57 | 5.50 | 3.83 | 4.00 | 3.20 | 4.80 | 60.07 |
| i | 1.67 | 1.71 | 1.14 | 0.86 | 1.00 | 0.33 | 0.57 | 0.00 | 0.33 | 0.57 | 0.00 | 0.00 | 0.00 | 0.17 | 0.80 | 0.71 | 0.17 | 0.71 | 0.71 | 0.83 | 0.50 | 0.71 | 1.00 | 1.14 | 1.43 | 2.29 | 1.17 | 1.67 | 1.33 | 1.40 | 0.83 | 10.40 |
| c | 0.33 | 0.00 | 0.43 | 0.29 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.52 |
| CV | 142.67 | 124.29 | 113.71 | 100.14 | 107.17 | 69.67 | 73.43 | 52.50 | 38.33 | 44.71 | 73.40 | 54.50 | 69.33 | 65.17 | 91.80 | 65.71 | 72.17 | 74.00 | 79.86 | 115.83 | 84.33 | 123.29 | 113.17 | 130.29 | 133.14 | 143.29 | 130.33 | 98.83 | 99.67 | 98.40 | 92.77 | 100 |
| CVn | 40.00 | 37.29 | 34.00 | 26.14 | 29.83 | 16.83 | 30.00 | 23.83 | 19.00 | 31.00 | 35.60 | 16.17 | 19.67 | 27.00 | 45.60 | 22.71 | 16.17 | 27.71 | 26.29 | 45.17 | 28.00 | 54.71 | 66.00 | 95.43 | 99.71 | 92.14 | 66.00 | 45.83 | 49.67 | 53.00 | 40.68 | 43.85 |
| CVs | 102.67 | 87.00 | 79.71 | 74.00 | 77.33 | 52.83 | 43.43 | 28.67 | 19.33 | 13.71 | 37.80 | 38.33 | 49.67 | 38.17 | 46.20 | 43.00 | 56.00 | 46.29 | 53.57 | 70.67 | 56.33 | 68.57 | 47.17 | 34.86 | 33.43 | 51.14 | 64.33 | 53.00 | 50.00 | 45.40 | 52.09 | 56.15 |
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