Statistics of sunspot activity
July, 1999
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 | 219.33 | 209.00 | 179.25 | 201.50 | 190.67 | 171.75 | 151.33 | 149.00 | 158.00 | 169.00 | 164.50 | 181.25 | 146.75 | 106.00 | 111.33 | 97.00 | 90.67 | | | | 113.25 | 126.25 | 143.67 | 163.50 | 160.67 | 133.33 | 130.25 | 169.75 | 170.33 | 157.00 | 144.50 | 153.89 | 100 |
| Wn | 103.33 | 110.00 | 79.75 | 99.00 | 104.33 | 97.00 | 53.67 | 53.00 | 76.00 | 90.67 | 81.50 | 85.50 | 69.50 | 49.33 | 56.33 | 50.00 | 45.67 | | | | 101.00 | 113.25 | 121.33 | 122.00 | 105.33 | 78.33 | 58.25 | 68.75 | 55.33 | 39.67 | 38.25 | 78.79 | 51.20 |
| Ws | 116.00 | 99.00 | 99.50 | 102.50 | 86.33 | 74.75 | 97.67 | 96.00 | 82.00 | 78.33 | 83.00 | 95.75 | 77.25 | 56.67 | 55.00 | 47.00 | 45.00 | | | | 12.25 | 13.00 | 22.33 | 41.50 | 55.33 | 55.00 | 72.00 | 101.00 | 115.00 | 117.33 | 106.25 | 75.10 | 48.80 |
| n | 10.67 | 10.33 | 9.25 | 10.25 | 10.67 | 10.50 | 9.33 | 10.33 | 10.50 | 11.00 | 9.50 | 11.00 | 8.75 | 6.00 | 6.00 | 5.33 | 4.67 | | | | 6.00 | 6.00 | 6.00 | 7.50 | 7.33 | 5.67 | 6.25 | 8.50 | 7.33 | 7.00 | 7.00 | 8.17 | 100 |
| A | 2.33 | 0.33 | 1.00 | 1.75 | 1.33 | 1.25 | 1.33 | 1.33 | 0.50 | 1.67 | 0.50 | 1.00 | 1.25 | 0.33 | 0.67 | 0.33 | 0.00 | | | | 1.00 | 0.75 | 0.33 | 0.50 | 0.00 | 0.67 | 0.25 | 1.50 | 0.00 | 0.67 | 1.25 | 0.85 | 10.42 |
| B | 0.67 | 2.67 | 0.50 | 0.00 | 0.67 | 2.00 | 1.33 | 2.00 | 1.75 | 1.00 | 0.75 | 1.25 | 0.75 | 0.00 | 0.67 | 0.67 | 0.00 | | | | 0.50 | 0.75 | 1.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.75 | 1.33 | 0.33 | 1.00 | 0.87 | 10.64 |
| C | 1.00 | 2.33 | 0.50 | 1.75 | 2.33 | 2.25 | 1.33 | 1.33 | 2.25 | 3.67 | 3.00 | 2.25 | 2.00 | 1.33 | 1.00 | 1.00 | 1.00 | | | | 0.25 | 0.50 | 0.67 | 1.00 | 1.00 | 0.00 | 1.00 | 0.75 | 1.67 | 2.67 | 1.75 | 1.49 | 18.19 |
| D | 2.00 | 1.00 | 2.25 | 1.75 | 3.00 | 1.50 | 0.33 | 1.33 | 2.75 | 0.33 | 1.00 | 1.50 | 1.75 | 1.33 | 0.67 | 0.67 | 1.67 | | | | 1.00 | 1.75 | 1.33 | 2.00 | 0.67 | 1.00 | 1.25 | 1.00 | 1.33 | 1.00 | 0.50 | 1.35 | 16.47 |
| E | 1.67 | 1.00 | 0.25 | 1.00 | 0.33 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | | | | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 1.00 | 0.00 | 0.00 | 0.24 | 2.99 |
| F | 0.33 | 0.67 | 1.00 | 0.75 | 1.00 | 0.75 | 1.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | | | | 0.50 | 1.00 | 1.00 | 1.00 | 1.00 | 1.33 | 1.25 | 0.75 | 0.33 | 0.33 | 0.50 | 0.56 | 6.85 |
| G | 1.00 | 1.00 | 1.25 | 0.75 | 0.00 | 0.75 | 1.00 | 0.67 | 1.75 | 3.00 | 2.00 | 2.25 | 0.75 | 0.67 | 2.00 | 2.33 | 1.67 | | | | 0.50 | 0.00 | 0.00 | 0.00 | 1.33 | 0.67 | 1.00 | 1.50 | 1.33 | 1.33 | 1.25 | 1.13 | 13.88 |
| H | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.25 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.33 | 0.00 | 0.00 | 0.00 | | | | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 0.77 |
| I | 1.67 | 1.33 | 2.50 | 2.50 | 1.67 | 1.50 | 2.67 | 3.00 | 1.50 | 1.33 | 1.75 | 2.25 | 1.75 | 1.67 | 1.00 | 0.33 | 0.33 | | | | 2.25 | 1.25 | 1.67 | 2.00 | 2.33 | 2.00 | 1.50 | 1.75 | 0.33 | 0.67 | 0.75 | 1.62 | 19.79 |
| x | 3.00 | 3.00 | 1.50 | 1.75 | 2.00 | 3.25 | 2.67 | 3.33 | 2.25 | 2.67 | 1.25 | 2.25 | 2.00 | 0.33 | 1.33 | 1.00 | 0.00 | | | | 1.50 | 1.50 | 1.33 | 1.50 | 1.00 | 0.67 | 0.25 | 2.25 | 1.33 | 1.00 | 2.25 | 1.72 | 21.06 |
| r | 0.67 | 0.00 | 0.25 | 0.75 | 0.00 | 1.50 | 1.67 | 0.00 | 0.50 | 1.33 | 0.25 | 0.00 | 0.25 | 1.00 | 1.33 | 0.00 | 0.33 | | | | 0.25 | 0.25 | 0.67 | 0.50 | 0.33 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.45 | 5.47 |
| s | 2.67 | 3.33 | 2.75 | 2.75 | 2.67 | 2.75 | 2.00 | 3.33 | 4.25 | 3.67 | 2.50 | 3.25 | 2.00 | 1.33 | 0.67 | 1.33 | 0.33 | | | | 2.50 | 2.00 | 1.00 | 1.50 | 2.67 | 2.33 | 2.50 | 2.50 | 2.67 | 2.00 | 2.75 | 2.36 | 28.86 |
| a | 4.00 | 3.33 | 4.50 | 4.50 | 5.00 | 1.00 | 1.33 | 3.00 | 3.00 | 2.67 | 5.50 | 5.25 | 4.25 | 3.00 | 2.67 | 3.00 | 4.00 | | | | 1.75 | 1.50 | 1.33 | 2.00 | 2.33 | 1.33 | 2.00 | 2.50 | 1.33 | 3.33 | 1.75 | 2.90 | 35.50 |
| h | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.50 | 0.00 | 0.33 | 0.25 | 0.67 | 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 | 0.33 | 0.00 | 0.00 | 0.11 | 1.31 |
| k | 0.33 | 0.67 | 0.25 | 0.50 | 0.33 | 1.50 | 1.67 | 0.33 | 0.25 | 0.00 | 0.00 | 0.25 | 0.25 | 0.33 | 0.00 | 0.00 | 0.00 | | | | 0.00 | 0.50 | 1.67 | 2.00 | 1.00 | 1.33 | 1.50 | 1.25 | 1.33 | 0.33 | 0.25 | 0.64 | 7.80 |
| x | 4.00 | 1.67 | 3.50 | 4.25 | 3.33 | 3.00 | 4.33 | 4.33 | 2.00 | 3.00 | 2.25 | 3.50 | 3.25 | 2.33 | 1.67 | 0.67 | 0.33 | | | | 3.25 | 2.00 | 2.00 | 2.50 | 2.33 | 2.67 | 1.75 | 3.25 | 0.33 | 1.33 | 2.00 | 2.53 | 30.98 |
| o | 4.33 | 7.00 | 4.50 | 4.25 | 5.33 | 6.50 | 4.00 | 5.33 | 8.00 | 8.00 | 6.75 | 7.25 | 5.25 | 3.33 | 4.33 | 4.67 | 4.33 | | | | 2.25 | 2.50 | 2.67 | 4.00 | 4.00 | 1.33 | 3.00 | 4.00 | 5.00 | 5.33 | 4.50 | 4.71 | 57.62 |
| i | 1.67 | 1.00 | 0.75 | 1.25 | 1.67 | 0.75 | 0.67 | 0.67 | 0.50 | 0.00 | 0.50 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | | | | 0.50 | 1.00 | 0.67 | 0.00 | 0.67 | 1.00 | 1.00 | 0.50 | 1.33 | 0.33 | 0.25 | 0.61 | 7.43 |
| c | 0.67 | 0.67 | 0.50 | 0.50 | 0.33 | 0.25 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | | | | 0.00 | 0.50 | 0.67 | 1.00 | 0.33 | 0.67 | 0.50 | 0.75 | 0.67 | 0.00 | 0.25 | 0.32 | 3.97 |
| CV | 151.00 | 146.33 | 141.75 | 145.75 | 167.00 | 163.75 | 132.33 | 120.67 | 153.50 | 139.67 | 118.25 | 142.50 | 105.00 | 84.67 | 67.33 | 78.67 | 77.33 | | | | 70.00 | 103.00 | 116.67 | 148.00 | 126.67 | 128.33 | 143.50 | 145.50 | 161.00 | 94.67 | 88.50 | 123.62 | 100 |
| CVn | 84.33 | 86.00 | 81.00 | 65.75 | 85.33 | 95.50 | 55.67 | 51.67 | 74.25 | 70.00 | 57.75 | 66.50 | 50.00 | 42.33 | 34.00 | 37.00 | 38.67 | | | | 64.75 | 84.50 | 101.33 | 100.50 | 75.33 | 55.67 | 62.75 | 61.25 | 60.33 | 26.33 | 28.50 | 64.18 | 51.92 |
| CVs | 66.67 | 60.33 | 60.75 | 80.00 | 81.67 | 68.25 | 76.67 | 69.00 | 79.25 | 69.67 | 60.50 | 76.00 | 55.00 | 42.33 | 33.33 | 41.67 | 38.67 | | | | 5.25 | 18.50 | 15.33 | 47.50 | 51.33 | 72.67 | 80.75 | 84.25 | 100.67 | 68.33 | 60.00 | 59.44 | 48.08 |
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