Statistics of sunspot activity
August, 1998
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 | 73.67 | 92.25 | 90.25 | 78.75 | 85.75 | 103.75 | 122.67 | 110.75 | 139.75 | 134.75 | 142.00 | 131.25 | 106.50 | 75.00 | 94.00 | 92.25 | 90.50 | 91.50 | 113.25 | 105.25 | 105.25 | 92.75 | 98.75 | 92.50 | 100.00 | 114.25 | 116.50 | 157.50 | 117.00 | 124.75 | 123.00 | 106.97 | 100 |
| Wn | 37.00 | 58.25 | 62.75 | 58.75 | 48.75 | 60.25 | 79.00 | 65.25 | 56.50 | 52.25 | 66.00 | 69.75 | 62.25 | 44.75 | 63.00 | 51.00 | 46.00 | 46.25 | 70.50 | 68.25 | 72.25 | 66.50 | 75.50 | 69.75 | 78.00 | 88.75 | 91.25 | 141.00 | 92.75 | 91.50 | 84.50 | 68.33 | 63.88 |
| Ws | 36.67 | 34.00 | 27.50 | 20.00 | 37.00 | 43.50 | 43.67 | 45.50 | 83.25 | 82.50 | 76.00 | 61.50 | 44.25 | 30.25 | 31.00 | 41.25 | 44.50 | 45.25 | 42.75 | 37.00 | 33.00 | 26.25 | 23.25 | 22.75 | 22.00 | 25.50 | 25.25 | 16.50 | 24.25 | 33.25 | 38.50 | 38.64 | 36.12 |
| n | 6.00 | 7.75 | 7.00 | 5.00 | 4.00 | 5.75 | 6.67 | 5.50 | 5.50 | 6.00 | 6.00 | 6.50 | 6.00 | 4.50 | 6.00 | 6.25 | 6.00 | 7.00 | 8.75 | 7.75 | 7.50 | 6.25 | 6.25 | 5.50 | 6.25 | 7.75 | 7.00 | 7.50 | 6.25 | 7.00 | 5.25 | 6.34 | 100 |
| A | 1.00 | 2.00 | 1.50 | 0.25 | 0.50 | 1.00 | 0.33 | 0.50 | 0.25 | 0.25 | 0.00 | 0.50 | 0.75 | 0.25 | 1.25 | 0.25 | 0.00 | 0.50 | 0.75 | 0.75 | 1.25 | 0.75 | 1.50 | 0.50 | 1.25 | 2.00 | 1.25 | 1.00 | 0.25 | 1.00 | 1.00 | 0.78 | 12.39 |
| B | 1.00 | 1.00 | 1.25 | 1.00 | 0.00 | 0.25 | 2.33 | 1.25 | 0.50 | 1.25 | 1.00 | 1.00 | 1.00 | 0.75 | 0.75 | 0.25 | 0.25 | 0.25 | 1.25 | 0.75 | 1.00 | 0.75 | 0.75 | 0.75 | 1.00 | 1.50 | 1.00 | 2.50 | 1.00 | 0.00 | 0.00 | 0.88 | 13.92 |
| C | 0.67 | 1.00 | 0.75 | 0.75 | 2.00 | 1.00 | 1.00 | 1.25 | 2.50 | 1.75 | 2.50 | 2.00 | 1.50 | 1.50 | 1.75 | 2.50 | 2.50 | 2.50 | 1.50 | 1.25 | 1.50 | 1.25 | 1.25 | 1.50 | 0.50 | 0.75 | 1.25 | 0.00 | 0.75 | 0.50 | 0.50 | 1.35 | 21.34 |
| D | 0.00 | 0.25 | 0.25 | 1.00 | 0.00 | 0.75 | 0.67 | 0.25 | 0.00 | 0.25 | 0.25 | 0.75 | 0.75 | 0.50 | 0.00 | 1.25 | 1.75 | 0.75 | 1.25 | 1.00 | 1.50 | 2.00 | 0.75 | 0.75 | 0.50 | 0.25 | 2.00 | 2.00 | 1.50 | 2.25 | 1.50 | 0.86 | 13.58 |
| E | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.25 | 1.00 | 1.00 | 0.12 | 1.91 |
| F | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 0.75 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.75 | 0.75 | 0.25 | 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 | 0.00 | 0.00 | 0.00 | 0.27 | 4.33 |
| G | 0.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.25 | 1.00 | 1.00 | 1.25 | 1.00 | 1.25 | 1.50 | 0.75 | 0.75 | 0.50 | 0.00 | 0.75 | 0.50 | 0.25 | 1.00 | 0.00 | 0.75 | 1.25 | 0.25 | 0.00 | 0.25 | 0.50 | 1.00 | 0.59 | 9.29 |
| H | 1.00 | 0.75 | 0.00 | 0.00 | 0.00 | 0.50 | 1.00 | 0.75 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.15 | 2.42 |
| I | 2.33 | 2.75 | 2.25 | 1.00 | 0.50 | 1.00 | 0.33 | 0.50 | 0.75 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.75 | 1.25 | 0.75 | 2.50 | 3.75 | 3.25 | 1.75 | 1.25 | 1.00 | 1.75 | 2.00 | 2.00 | 1.25 | 2.00 | 2.25 | 1.75 | 0.25 | 1.32 | 20.83 |
| x | 2.00 | 3.00 | 2.75 | 1.25 | 0.50 | 1.25 | 2.67 | 1.75 | 0.75 | 1.50 | 1.00 | 1.50 | 1.75 | 1.00 | 2.00 | 0.50 | 0.25 | 0.75 | 2.00 | 1.50 | 2.25 | 1.50 | 2.25 | 1.25 | 2.25 | 3.50 | 2.25 | 3.50 | 1.25 | 1.00 | 1.00 | 1.67 | 26.30 |
| r | 0.00 | 0.25 | 0.50 | 0.75 | 0.50 | 1.25 | 0.00 | 0.00 | 0.50 | 0.25 | 0.50 | 0.00 | 0.25 | 0.00 | 0.00 | 0.50 | 0.00 | 0.25 | 0.00 | 0.25 | 0.00 | 0.25 | 0.00 | 0.25 | 0.00 | 0.25 | 0.25 | 0.00 | 0.25 | 0.75 | 0.25 | 0.26 | 4.07 |
| s | 1.33 | 3.25 | 3.50 | 0.75 | 2.00 | 2.00 | 0.67 | 0.50 | 1.25 | 0.75 | 0.75 | 1.50 | 1.00 | 1.25 | 1.50 | 2.00 | 2.00 | 3.25 | 3.00 | 4.00 | 3.50 | 2.50 | 2.25 | 1.25 | 1.50 | 3.00 | 3.75 | 2.50 | 2.25 | 2.25 | 1.50 | 2.02 | 31.82 |
| a | 1.67 | 0.50 | 0.25 | 2.00 | 0.75 | 0.25 | 1.67 | 0.75 | 0.75 | 1.50 | 1.75 | 1.50 | 1.00 | 0.25 | 0.75 | 2.25 | 2.75 | 2.00 | 3.00 | 1.00 | 0.75 | 1.00 | 0.75 | 1.75 | 1.50 | 0.00 | 0.75 | 1.50 | 1.75 | 1.00 | 0.50 | 1.21 | 19.13 |
| h | 1.00 | 0.75 | 0.00 | 0.25 | 0.00 | 0.25 | 0.67 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.50 | 0.50 | 0.00 | 0.50 | 0.50 | 0.50 | 0.25 | 0.00 | 0.25 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.22 | 3.52 |
| k | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.75 | 1.00 | 2.50 | 2.00 | 2.00 | 2.00 | 2.00 | 1.50 | 1.50 | 1.75 | 0.50 | 0.50 | 0.25 | 0.50 | 1.00 | 0.75 | 1.00 | 0.75 | 1.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.50 | 1.75 | 2.00 | 0.96 | 15.15 |
| x | 4.33 | 5.50 | 3.75 | 1.25 | 1.00 | 2.50 | 1.67 | 1.75 | 1.25 | 0.50 | 0.00 | 0.50 | 0.75 | 0.25 | 2.00 | 1.50 | 0.75 | 3.00 | 4.75 | 4.00 | 3.00 | 2.00 | 2.50 | 2.25 | 3.25 | 4.00 | 2.50 | 3.00 | 2.50 | 2.75 | 1.25 | 2.26 | 35.64 |
| o | 1.67 | 2.25 | 3.25 | 3.75 | 2.00 | 2.50 | 4.00 | 2.75 | 3.00 | 4.25 | 4.25 | 4.50 | 3.75 | 4.00 | 4.00 | 4.50 | 4.75 | 3.50 | 3.75 | 3.75 | 4.25 | 4.00 | 3.25 | 2.75 | 2.50 | 3.50 | 3.75 | 4.00 | 3.00 | 2.75 | 3.00 | 3.45 | 54.43 |
| i | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.25 | 0.50 | 0.25 | 1.00 | 0.75 | 0.75 | 0.00 | 0.00 | 0.00 | 0.50 | 0.25 | 0.25 | 0.00 | 0.25 | 0.25 | 0.50 | 0.25 | 0.00 | 0.00 | 0.50 | 0.00 | 0.50 | 0.75 | 0.50 | 0.27 | 4.33 |
| c | 0.00 | 0.00 | 0.00 | 0.00 | 0.75 | 0.50 | 1.00 | 0.75 | 0.75 | 1.00 | 0.75 | 0.75 | 0.75 | 0.25 | 0.00 | 0.25 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.50 | 0.25 | 0.25 | 0.50 | 0.25 | 0.75 | 0.50 | 0.35 | 5.60 |
| CV | 68.67 | 75.75 | 63.25 | 61.75 | 61.25 | 97.75 | 119.00 | 129.25 | 131.75 | 140.50 | 143.75 | 153.75 | 144.50 | 123.25 | 109.25 | 109.50 | 113.00 | 98.75 | 100.00 | 105.75 | 104.25 | 97.00 | 88.25 | 77.25 | 89.00 | 96.00 | 83.75 | 73.00 | 94.75 | 157.50 | 137.50 | 104.80 | 100 |
| CVn | 18.67 | 26.25 | 34.75 | 33.50 | 23.75 | 56.00 | 70.00 | 86.50 | 86.25 | 85.25 | 86.75 | 95.50 | 86.75 | 81.50 | 73.50 | 71.75 | 70.00 | 60.75 | 72.75 | 76.50 | 78.75 | 73.25 | 68.00 | 62.25 | 75.00 | 82.25 | 68.00 | 58.00 | 56.25 | 98.00 | 86.75 | 67.84 | 64.74 |
| CVs | 50.00 | 49.50 | 28.50 | 28.25 | 37.50 | 41.75 | 49.00 | 42.75 | 45.50 | 55.25 | 57.00 | 58.25 | 57.75 | 41.75 | 35.75 | 37.75 | 43.00 | 38.00 | 27.25 | 29.25 | 25.50 | 23.75 | 20.25 | 15.00 | 14.00 | 13.75 | 15.75 | 15.00 | 38.50 | 59.50 | 50.75 | 36.95 | 35.26 |
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