Statistics of sunspot activity
March, 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 | 219.17 | 221.17 | 213.75 | 152.20 | 130.67 | 134.67 | 138.50 | 123.00 | 93.43 | 107.67 | 99.33 | 104.67 | 116.25 | 101.14 | 139.17 | 167.67 | 161.50 | 233.25 | 250.33 | 260.50 | 301.29 | 255.00 | 285.40 | 284.40 | 264.00 | 253.50 | 206.50 | 164.40 | 174.00 | 163.67 | 134.57 | 182.41 | 100 |
| Wn | 83.50 | 89.00 | 104.00 | 72.60 | 61.83 | 50.67 | 56.25 | 53.33 | 40.57 | 50.33 | 58.67 | 79.00 | 92.00 | 70.86 | 96.00 | 113.83 | 102.50 | 105.75 | 97.33 | 98.63 | 91.43 | 43.00 | 53.40 | 64.20 | 57.50 | 55.25 | 45.25 | 36.00 | 48.25 | 45.17 | 52.29 | 69.95 | 38.35 |
| Ws | 135.67 | 132.17 | 109.75 | 79.60 | 68.83 | 84.00 | 82.25 | 69.67 | 52.86 | 57.33 | 40.67 | 25.67 | 24.25 | 30.29 | 43.17 | 53.83 | 59.00 | 127.50 | 153.00 | 161.88 | 209.86 | 212.00 | 232.00 | 220.20 | 206.50 | 198.25 | 161.25 | 128.40 | 125.75 | 118.50 | 82.29 | 112.46 | 61.65 |
| n | 12.00 | 12.17 | 11.25 | 8.20 | 7.00 | 7.33 | 6.25 | 5.00 | 5.14 | 7.33 | 7.17 | 6.67 | 7.25 | 6.71 | 8.33 | 9.83 | 9.50 | 12.50 | 14.33 | 13.63 | 13.71 | 10.29 | 11.20 | 11.80 | 10.67 | 10.50 | 9.50 | 8.80 | 10.75 | 11.17 | 8.71 | 9.51 | 100 |
| A | 1.33 | 0.83 | 1.25 | 1.00 | 2.17 | 2.17 | 1.50 | 0.00 | 0.14 | 0.50 | 1.17 | 0.50 | 1.00 | 0.43 | 1.33 | 1.83 | 0.50 | 1.75 | 1.00 | 2.50 | 3.57 | 3.14 | 1.40 | 2.00 | 1.50 | 1.25 | 1.75 | 0.60 | 0.75 | 0.83 | 0.43 | 1.29 | 13.62 |
| B | 0.33 | 1.00 | 0.50 | 1.00 | 0.67 | 0.50 | 0.00 | 0.67 | 0.57 | 1.67 | 1.67 | 1.50 | 1.00 | 0.14 | 0.33 | 0.00 | 1.00 | 2.50 | 3.50 | 2.00 | 2.57 | 0.71 | 2.20 | 2.60 | 1.33 | 1.75 | 1.25 | 0.80 | 1.75 | 1.17 | 0.14 | 1.19 | 12.50 |
| C | 2.50 | 3.33 | 3.00 | 1.80 | 0.67 | 0.83 | 1.00 | 0.67 | 0.86 | 1.50 | 1.00 | 1.33 | 1.50 | 2.00 | 1.50 | 2.00 | 0.83 | 1.75 | 1.50 | 2.00 | 2.57 | 1.29 | 1.60 | 2.20 | 2.17 | 1.75 | 2.50 | 2.60 | 2.50 | 1.83 | 0.86 | 1.72 | 18.13 |
| D | 3.50 | 3.33 | 3.25 | 2.40 | 2.00 | 2.67 | 2.75 | 2.33 | 2.00 | 1.67 | 1.67 | 2.50 | 2.50 | 2.14 | 1.67 | 1.50 | 0.83 | 1.25 | 2.00 | 2.13 | 0.86 | 1.43 | 1.00 | 0.80 | 0.50 | 1.00 | 0.50 | 0.80 | 2.75 | 3.67 | 3.57 | 1.97 | 20.69 |
| E | 0.33 | 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 | 0.17 | 0.67 | 0.67 | 0.00 | 0.50 | 0.38 | 0.14 | 0.29 | 1.20 | 0.80 | 0.67 | 1.00 | 0.25 | 0.80 | 0.25 | 0.00 | 0.14 | 0.27 | 2.88 |
| 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 | 1.00 | 0.83 | 1.13 | 1.43 | 1.29 | 1.40 | 0.20 | 0.50 | 1.25 | 0.75 | 0.40 | 0.25 | 0.00 | 0.00 | 0.34 | 3.54 |
| G | 0.33 | 0.50 | 0.25 | 0.60 | 0.50 | 0.17 | 0.25 | 0.33 | 0.00 | 0.00 | 0.17 | 0.00 | 0.25 | 0.29 | 0.83 | 0.50 | 0.83 | 0.75 | 0.50 | 0.75 | 1.57 | 1.57 | 1.60 | 2.60 | 2.67 | 1.50 | 1.50 | 1.20 | 0.75 | 0.17 | 0.43 | 0.75 | 7.93 |
| H | 0.17 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.43 | 0.17 | 0.33 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.67 | 0.00 | 0.13 | 1.33 |
| I | 3.50 | 2.67 | 2.75 | 1.40 | 1.00 | 1.00 | 0.75 | 1.00 | 1.14 | 1.83 | 1.17 | 0.83 | 0.75 | 1.71 | 2.50 | 3.33 | 4.83 | 3.00 | 3.83 | 2.75 | 1.00 | 0.57 | 0.80 | 0.60 | 1.33 | 1.00 | 1.00 | 1.60 | 1.50 | 2.83 | 3.14 | 1.84 | 19.39 |
| x | 1.67 | 1.83 | 1.75 | 2.00 | 2.83 | 2.67 | 1.50 | 0.67 | 0.71 | 2.17 | 2.83 | 2.00 | 2.00 | 0.57 | 1.67 | 1.83 | 1.50 | 4.25 | 4.50 | 4.50 | 6.14 | 3.86 | 3.60 | 4.60 | 2.83 | 3.00 | 3.00 | 1.40 | 2.50 | 2.00 | 0.57 | 2.48 | 26.11 |
| r | 0.00 | 0.50 | 1.00 | 0.40 | 0.17 | 0.00 | 0.25 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.50 | 0.14 | 0.17 | 0.17 | 0.00 | 0.25 | 0.67 | 0.50 | 0.86 | 0.43 | 1.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.17 | 0.29 | 0.26 | 2.74 |
| s | 3.17 | 1.83 | 1.75 | 1.00 | 0.50 | 0.50 | 0.50 | 0.33 | 1.14 | 2.50 | 1.33 | 1.83 | 1.25 | 2.29 | 2.67 | 3.17 | 4.00 | 2.75 | 4.00 | 2.25 | 1.00 | 0.29 | 0.80 | 0.80 | 1.83 | 1.25 | 2.00 | 2.00 | 2.75 | 2.83 | 2.86 | 1.84 | 19.40 |
| a | 5.33 | 6.17 | 6.25 | 4.20 | 2.33 | 3.17 | 2.75 | 2.33 | 1.86 | 1.17 | 2.00 | 2.33 | 2.75 | 3.00 | 3.33 | 4.00 | 3.17 | 3.75 | 3.67 | 5.00 | 4.29 | 3.14 | 4.40 | 4.00 | 4.50 | 3.25 | 1.75 | 2.80 | 3.25 | 5.00 | 4.57 | 3.53 | 37.16 |
| h | 0.50 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.67 | 0.71 | 0.33 | 0.50 | 0.17 | 0.50 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.14 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.25 | 0.33 | 0.00 | 0.18 | 1.85 |
| k | 1.33 | 1.83 | 0.50 | 0.60 | 0.83 | 0.67 | 1.25 | 1.00 | 0.71 | 1.00 | 0.50 | 0.33 | 0.25 | 0.57 | 0.50 | 0.67 | 0.83 | 1.50 | 1.17 | 1.38 | 1.43 | 2.43 | 1.40 | 2.00 | 1.50 | 3.00 | 2.75 | 2.60 | 1.75 | 0.83 | 0.43 | 1.21 | 12.74 |
| x | 5.00 | 4.00 | 4.00 | 2.40 | 3.17 | 3.17 | 2.25 | 1.00 | 1.71 | 2.50 | 2.67 | 1.33 | 2.00 | 2.14 | 3.83 | 5.17 | 5.33 | 5.25 | 5.50 | 5.25 | 4.57 | 3.71 | 2.20 | 2.60 | 2.83 | 2.25 | 2.75 | 2.20 | 2.50 | 4.33 | 3.57 | 3.26 | 34.34 |
| o | 5.67 | 7.33 | 6.75 | 5.40 | 3.33 | 3.00 | 2.75 | 3.33 | 2.86 | 4.83 | 4.33 | 4.83 | 4.50 | 4.00 | 3.83 | 3.33 | 3.17 | 4.75 | 6.67 | 6.25 | 6.86 | 4.43 | 6.00 | 8.20 | 6.67 | 5.25 | 5.50 | 5.20 | 7.50 | 6.33 | 4.29 | 5.07 | 53.32 |
| i | 1.17 | 0.83 | 0.50 | 0.40 | 0.50 | 1.17 | 1.25 | 0.67 | 0.57 | 0.00 | 0.17 | 0.50 | 0.75 | 0.57 | 0.67 | 1.33 | 1.00 | 2.50 | 2.17 | 2.13 | 2.29 | 2.00 | 3.00 | 1.00 | 0.83 | 2.75 | 1.00 | 1.40 | 0.75 | 0.50 | 0.86 | 1.14 | 11.95 |
| c | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | 0.00 | 0.33 | 0.25 | 0.25 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.39 |
| CV | 194.50 | 179.00 | 133.75 | 102.20 | 97.33 | 101.50 | 108.00 | 113.67 | 104.00 | 107.00 | 94.00 | 91.17 | 103.25 | 102.29 | 105.67 | 122.00 | 127.00 | 159.50 | 186.83 | 176.00 | 158.00 | 180.86 | 171.40 | 176.60 | 167.67 | 211.75 | 177.25 | 175.20 | 177.00 | 161.00 | 131.57 | 141.84 | 100 |
| CVn | 88.00 | 77.67 | 47.25 | 38.60 | 43.50 | 36.33 | 40.75 | 37.67 | 45.43 | 52.17 | 55.50 | 70.67 | 80.25 | 74.71 | 77.00 | 84.67 | 80.83 | 78.50 | 62.83 | 52.63 | 29.71 | 12.14 | 18.60 | 24.60 | 26.50 | 24.50 | 17.50 | 25.40 | 29.75 | 44.67 | 52.29 | 49.37 | 34.81 |
| CVs | 106.50 | 101.33 | 86.50 | 63.60 | 53.83 | 65.17 | 67.25 | 76.00 | 58.57 | 54.83 | 38.50 | 20.50 | 23.00 | 27.57 | 28.67 | 37.33 | 46.17 | 81.00 | 124.00 | 123.38 | 128.29 | 168.71 | 152.80 | 152.00 | 141.17 | 187.25 | 159.75 | 149.80 | 147.25 | 116.33 | 79.29 | 92.46 | 65.19 |
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