Statistics of sunspot activity
July, 1990
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 | 330.83 | 312.00 | 299.20 | 280.17 | 240.17 | 230.80 | 228.60 | 174.00 | 115.20 | 134.33 | 129.43 | 127.00 | 136.67 | 140.00 | 127.00 | 124.14 | 107.86 | 72.50 | 74.43 | 103.00 | 168.83 | 224.60 | 210.43 | 232.14 | 258.86 | 274.25 | 226.00 | 194.86 | 188.14 | 150.33 | 176.29 | 186.84 | 100 |
| Wn | 132.83 | 125.67 | 120.20 | 113.00 | 102.67 | 101.20 | 105.40 | 87.17 | 62.80 | 76.83 | 84.57 | 77.25 | 89.67 | 80.57 | 95.00 | 86.71 | 67.86 | 36.67 | 41.57 | 62.33 | 111.33 | 133.20 | 126.29 | 123.43 | 127.71 | 140.75 | 107.60 | 75.71 | 71.00 | 55.83 | 62.71 | 93.08 | 49.82 |
| Ws | 198.00 | 186.33 | 179.00 | 167.17 | 137.50 | 129.60 | 123.20 | 86.83 | 52.40 | 57.50 | 44.86 | 49.75 | 47.00 | 59.43 | 32.00 | 37.43 | 40.00 | 35.83 | 32.86 | 40.67 | 57.50 | 91.40 | 84.14 | 108.71 | 131.14 | 133.50 | 118.40 | 119.14 | 117.14 | 94.50 | 113.57 | 93.76 | 50.18 |
| n | 14.67 | 12.00 | 11.20 | 10.33 | 11.00 | 11.80 | 11.80 | 10.17 | 7.40 | 9.00 | 8.43 | 7.00 | 7.67 | 8.57 | 7.75 | 8.43 | 8.14 | 4.50 | 4.14 | 5.00 | 9.00 | 12.80 | 11.57 | 13.29 | 14.14 | 14.50 | 12.40 | 12.43 | 12.57 | 10.50 | 11.86 | 10.13 | 100 |
| A | 1.50 | 0.50 | 0.40 | 0.17 | 1.17 | 2.00 | 1.60 | 0.67 | 0.40 | 2.33 | 2.43 | 0.75 | 0.67 | 2.14 | 1.25 | 1.00 | 1.57 | 1.00 | 0.57 | 1.17 | 1.50 | 1.60 | 2.00 | 3.14 | 3.71 | 1.25 | 0.20 | 0.43 | 1.43 | 1.67 | 1.86 | 1.36 | 13.40 |
| B | 2.17 | 0.83 | 0.20 | 0.00 | 1.00 | 0.80 | 1.60 | 1.33 | 1.40 | 1.67 | 1.29 | 0.50 | 1.00 | 0.86 | 0.75 | 1.29 | 0.71 | 0.00 | 0.00 | 0.33 | 2.67 | 3.60 | 2.43 | 3.00 | 1.86 | 2.00 | 1.40 | 1.71 | 2.14 | 1.50 | 1.14 | 1.33 | 13.11 |
| C | 2.67 | 2.00 | 1.00 | 1.33 | 2.67 | 1.00 | 0.80 | 0.67 | 1.40 | 1.33 | 0.57 | 1.00 | 1.83 | 2.29 | 1.50 | 1.14 | 1.14 | 0.67 | 0.71 | 1.00 | 1.17 | 1.20 | 1.29 | 2.43 | 2.29 | 2.75 | 2.60 | 2.71 | 3.00 | 3.33 | 3.43 | 1.71 | 16.85 |
| D | 2.00 | 3.50 | 5.60 | 5.17 | 3.00 | 3.80 | 3.40 | 2.50 | 1.00 | 0.83 | 1.14 | 2.25 | 2.17 | 1.29 | 1.75 | 1.71 | 1.14 | 0.00 | 0.14 | 0.17 | 0.33 | 0.80 | 1.14 | 0.14 | 1.14 | 1.75 | 3.60 | 2.43 | 1.29 | 0.83 | 1.29 | 1.85 | 18.25 |
| E | 1.67 | 1.83 | 1.20 | 1.33 | 1.67 | 0.60 | 1.20 | 0.67 | 0.00 | 0.00 | 0.14 | 0.25 | 0.00 | 0.00 | 0.50 | 0.00 | 0.14 | 0.83 | 1.00 | 0.67 | 0.00 | 0.00 | 0.14 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.45 | 4.45 |
| F | 0.33 | 0.50 | 0.60 | 0.33 | 0.33 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.33 | 0.67 | 1.00 | 1.00 | 0.71 | 0.86 | 1.00 | 0.80 | 0.29 | 0.00 | 0.00 | 0.00 | 0.29 | 2.89 |
| G | 2.00 | 1.83 | 1.20 | 1.67 | 1.00 | 1.60 | 1.00 | 1.33 | 1.00 | 1.00 | 0.71 | 0.75 | 0.00 | 0.00 | 0.00 | 0.57 | 0.71 | 0.00 | 0.43 | 1.00 | 1.33 | 1.40 | 1.00 | 1.14 | 1.29 | 1.75 | 0.20 | 0.71 | 0.71 | 0.50 | 0.86 | 0.93 | 9.14 |
| H | 0.17 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.60 | 0.00 | 0.00 | 0.50 | 0.43 | 0.08 | 0.74 |
| I | 2.17 | 1.00 | 1.00 | 0.17 | 0.17 | 2.00 | 2.20 | 2.83 | 2.20 | 1.67 | 2.00 | 1.50 | 2.00 | 2.00 | 2.00 | 2.71 | 2.71 | 1.67 | 1.29 | 0.33 | 1.33 | 3.20 | 2.57 | 2.57 | 3.00 | 4.00 | 3.00 | 4.14 | 4.00 | 2.17 | 2.86 | 2.14 | 21.16 |
| x | 3.67 | 1.33 | 0.60 | 0.17 | 2.17 | 2.80 | 3.20 | 2.00 | 1.80 | 4.00 | 3.71 | 1.25 | 1.67 | 3.00 | 2.00 | 2.29 | 2.29 | 1.00 | 0.57 | 1.50 | 4.17 | 5.20 | 4.43 | 6.14 | 5.57 | 3.25 | 1.60 | 2.14 | 3.57 | 3.17 | 3.00 | 2.69 | 26.51 |
| r | 0.50 | 0.00 | 0.00 | 0.33 | 0.33 | 0.20 | 0.40 | 0.17 | 0.00 | 0.17 | 0.14 | 0.50 | 0.17 | 0.14 | 0.75 | 0.14 | 0.29 | 0.00 | 0.29 | 0.33 | 1.17 | 1.00 | 0.71 | 0.57 | 0.71 | 0.75 | 0.00 | 0.43 | 0.71 | 0.00 | 0.14 | 0.36 | 3.52 |
| s | 2.17 | 1.83 | 1.00 | 1.50 | 1.50 | 1.60 | 2.40 | 2.67 | 1.00 | 1.17 | 1.71 | 1.00 | 2.83 | 1.86 | 2.50 | 1.57 | 1.57 | 1.17 | 1.14 | 0.67 | 1.50 | 1.80 | 2.00 | 2.57 | 2.71 | 5.50 | 3.80 | 4.00 | 3.29 | 2.33 | 3.86 | 2.14 | 21.09 |
| a | 4.67 | 6.00 | 5.00 | 4.33 | 3.83 | 4.00 | 3.60 | 4.00 | 3.60 | 2.50 | 2.43 | 4.25 | 3.00 | 3.57 | 2.50 | 4.43 | 4.00 | 1.67 | 0.86 | 0.67 | 0.17 | 2.40 | 2.43 | 2.00 | 3.14 | 2.00 | 5.00 | 4.71 | 4.00 | 4.17 | 3.57 | 3.31 | 32.64 |
| h | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.00 | 0.50 | 0.00 | 0.33 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | 0.17 | 0.00 | 0.14 | 0.57 | 0.29 | 0.25 | 0.20 | 0.29 | 0.43 | 0.17 | 0.71 | 0.15 | 1.51 |
| k | 3.67 | 2.83 | 4.60 | 4.00 | 3.17 | 2.80 | 2.20 | 0.83 | 1.00 | 0.83 | 0.29 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 1.14 | 1.83 | 1.83 | 2.40 | 1.86 | 1.43 | 1.71 | 2.75 | 1.80 | 0.86 | 0.57 | 0.67 | 0.57 | 1.49 | 14.75 |
| x | 3.83 | 1.50 | 1.40 | 0.50 | 1.33 | 4.00 | 3.80 | 3.50 | 2.60 | 4.17 | 4.57 | 2.25 | 2.67 | 4.14 | 3.25 | 3.71 | 4.29 | 2.83 | 1.86 | 1.50 | 2.83 | 4.80 | 4.57 | 5.71 | 6.71 | 5.25 | 3.80 | 4.57 | 5.43 | 4.33 | 5.14 | 3.58 | 35.30 |
| o | 7.50 | 6.67 | 6.20 | 6.00 | 6.83 | 5.80 | 5.00 | 4.33 | 4.40 | 4.50 | 3.14 | 4.25 | 4.33 | 3.86 | 3.75 | 4.71 | 3.71 | 0.67 | 1.29 | 2.50 | 5.50 | 7.00 | 5.71 | 6.71 | 6.57 | 8.00 | 7.00 | 7.29 | 6.71 | 6.17 | 6.57 | 5.25 | 51.80 |
| i | 2.67 | 3.67 | 3.40 | 3.67 | 2.83 | 1.80 | 2.80 | 2.33 | 0.40 | 0.33 | 0.71 | 0.50 | 0.67 | 0.57 | 0.75 | 0.00 | 0.14 | 1.00 | 1.00 | 1.00 | 0.67 | 1.00 | 1.29 | 0.86 | 0.86 | 1.25 | 1.40 | 0.57 | 0.43 | 0.00 | 0.14 | 1.25 | 12.32 |
| c | 0.67 | 0.17 | 0.20 | 0.17 | 0.00 | 0.20 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 0.57 |
| CV | 272.83 | 264.33 | 310.40 | 294.00 | 234.17 | 235.00 | 206.60 | 170.83 | 98.40 | 100.17 | 83.29 | 84.75 | 82.17 | 67.14 | 81.75 | 80.43 | 74.71 | 62.83 | 83.86 | 104.67 | 125.33 | 169.00 | 158.00 | 150.14 | 171.43 | 238.25 | 213.40 | 164.14 | 134.71 | 107.00 | 145.43 | 153.84 | 100 |
| CVn | 133.33 | 131.33 | 159.60 | 147.33 | 130.83 | 131.20 | 123.40 | 108.17 | 72.00 | 78.00 | 65.29 | 57.50 | 59.83 | 45.43 | 64.75 | 62.00 | 48.86 | 27.17 | 43.71 | 55.50 | 59.50 | 89.80 | 82.86 | 65.29 | 73.29 | 94.75 | 85.60 | 77.57 | 74.00 | 58.83 | 88.43 | 83.71 | 54.42 |
| CVs | 139.50 | 133.00 | 150.80 | 146.67 | 103.33 | 103.80 | 83.20 | 62.67 | 26.40 | 22.17 | 18.00 | 27.25 | 22.33 | 21.71 | 17.00 | 18.43 | 25.86 | 35.67 | 40.14 | 49.17 | 65.83 | 79.20 | 75.14 | 84.86 | 98.14 | 143.50 | 127.80 | 86.57 | 60.71 | 48.17 | 57.00 | 70.13 | 45.58 |
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