Statistics of sunspot activity
June, 1991
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 | 174.60 | 198.71 | 205.14 | 214.50 | 232.50 | 215.40 | 220.00 | 264.83 | 304.25 | 264.00 | 243.67 | 247.67 | 207.00 | 232.25 | 226.00 | 219.71 | 180.17 | 182.86 | 172.20 | 159.67 | 183.86 | 169.00 | 150.00 | 171.00 | 177.14 | 160.50 | 177.33 | 233.83 | 243.29 | 249.29 | 209.35 | 100 |
| Wn | 90.80 | 106.29 | 128.57 | 154.00 | 169.00 | 162.00 | 166.00 | 177.50 | 198.75 | 144.75 | 138.83 | 120.00 | 62.14 | 66.25 | 74.00 | 64.00 | 52.33 | 59.71 | 46.80 | 65.50 | 72.14 | 56.71 | 53.17 | 79.50 | 88.14 | 75.00 | 97.17 | 116.50 | 113.71 | 137.43 | 104.56 | 49.94 |
| Ws | 83.80 | 92.43 | 76.57 | 60.50 | 63.50 | 53.40 | 54.00 | 87.33 | 105.50 | 119.25 | 104.83 | 127.67 | 144.86 | 166.00 | 152.00 | 155.71 | 127.83 | 123.14 | 125.40 | 94.17 | 111.71 | 112.29 | 96.83 | 91.50 | 89.00 | 85.50 | 80.17 | 117.33 | 129.57 | 111.86 | 104.79 | 50.06 |
| n | 8.20 | 10.86 | 11.00 | 11.00 | 12.17 | 10.60 | 11.00 | 10.67 | 12.50 | 12.50 | 12.17 | 11.50 | 10.14 | 11.50 | 11.50 | 11.71 | 10.00 | 10.29 | 9.00 | 7.50 | 9.86 | 9.00 | 9.17 | 11.67 | 11.00 | 9.17 | 10.00 | 11.33 | 11.86 | 12.29 | 10.70 | 100 |
| A | 1.20 | 2.29 | 0.71 | 0.67 | 1.00 | 0.60 | 2.00 | 1.67 | 0.75 | 1.50 | 3.00 | 2.33 | 2.29 | 1.75 | 1.00 | 1.00 | 2.83 | 2.57 | 1.40 | 1.00 | 2.86 | 1.57 | 1.83 | 2.33 | 1.00 | 0.33 | 1.17 | 2.33 | 2.71 | 2.29 | 1.67 | 15.57 |
| B | 1.20 | 2.00 | 1.29 | 0.17 | 0.67 | 0.40 | 0.67 | 0.83 | 1.50 | 1.25 | 2.33 | 1.83 | 2.14 | 4.25 | 2.25 | 1.14 | 0.17 | 1.29 | 0.60 | 0.50 | 0.57 | 0.71 | 1.33 | 1.50 | 1.43 | 1.17 | 0.50 | 2.33 | 3.71 | 1.71 | 1.38 | 12.91 |
| C | 1.60 | 1.57 | 3.29 | 2.00 | 1.17 | 2.40 | 2.83 | 2.33 | 3.75 | 2.25 | 1.83 | 2.00 | 0.86 | 2.50 | 3.50 | 3.57 | 3.33 | 1.57 | 2.00 | 2.00 | 2.43 | 2.43 | 1.83 | 4.17 | 4.14 | 3.83 | 2.67 | 2.00 | 1.57 | 3.43 | 2.50 | 23.31 |
| D | 1.40 | 1.14 | 2.43 | 3.50 | 3.67 | 3.60 | 1.83 | 2.33 | 2.50 | 2.25 | 1.17 | 0.83 | 1.71 | 0.50 | 2.75 | 3.43 | 2.33 | 2.71 | 2.20 | 3.00 | 3.00 | 2.43 | 2.33 | 1.50 | 2.29 | 1.83 | 2.50 | 2.17 | 1.29 | 1.14 | 2.19 | 20.48 |
| E | 1.00 | 1.14 | 0.43 | 1.17 | 1.50 | 0.80 | 0.83 | 1.00 | 0.50 | 0.50 | 0.33 | 0.50 | 0.86 | 1.25 | 0.75 | 1.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.14 | 0.29 | 0.00 | 0.00 | 0.00 | 0.17 | 0.33 | 0.67 | 1.29 | 1.00 | 0.59 | 5.48 |
| F | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 1.25 | 1.25 | 1.17 | 1.33 | 0.57 | 0.50 | 0.50 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.33 | 0.17 | 0.00 | 0.00 | 0.00 | 0.33 | 0.29 | 0.29 | 0.29 | 2.73 |
| G | 1.60 | 2.57 | 1.71 | 1.00 | 1.17 | 1.00 | 0.50 | 0.33 | 0.25 | 0.25 | 0.33 | 0.00 | 0.57 | 0.50 | 0.75 | 0.43 | 0.33 | 0.14 | 0.00 | 0.00 | 0.00 | 0.29 | 0.50 | 0.17 | 0.14 | 0.00 | 0.00 | 0.17 | 0.00 | 0.29 | 0.50 | 4.67 |
| H | 0.00 | 0.00 | 0.00 | 0.50 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.17 | 0.00 | 0.00 | 0.00 | 0.04 | 0.36 |
| I | 0.20 | 0.14 | 1.14 | 2.00 | 2.67 | 1.80 | 2.33 | 1.67 | 2.00 | 3.25 | 2.00 | 2.67 | 1.14 | 0.25 | 0.00 | 1.00 | 0.83 | 2.00 | 2.80 | 1.00 | 0.86 | 1.14 | 1.00 | 1.83 | 2.00 | 1.67 | 2.67 | 1.33 | 1.00 | 2.14 | 1.55 | 14.49 |
| x | 2.40 | 4.29 | 2.00 | 0.83 | 1.67 | 1.00 | 2.67 | 2.50 | 2.25 | 2.75 | 5.33 | 4.17 | 4.43 | 6.00 | 3.25 | 2.14 | 3.00 | 3.86 | 2.00 | 1.50 | 3.43 | 2.29 | 3.17 | 3.83 | 2.43 | 1.50 | 1.67 | 4.67 | 6.43 | 4.00 | 3.05 | 28.47 |
| r | 0.40 | 0.14 | 0.00 | 0.00 | 0.17 | 0.40 | 0.17 | 0.17 | 0.00 | 0.00 | 0.00 | 0.67 | 0.14 | 1.25 | 0.50 | 0.86 | 0.00 | 0.00 | 2.00 | 0.83 | 0.14 | 0.00 | 0.17 | 0.50 | 0.71 | 1.50 | 1.00 | 0.67 | 0.29 | 0.57 | 0.44 | 4.12 |
| s | 0.60 | 1.43 | 2.14 | 2.33 | 1.83 | 3.20 | 3.17 | 2.17 | 3.25 | 2.75 | 2.67 | 2.50 | 2.14 | 0.75 | 3.00 | 3.86 | 1.67 | 2.86 | 1.80 | 1.83 | 1.29 | 1.29 | 2.67 | 5.00 | 3.57 | 2.83 | 2.83 | 0.83 | 1.00 | 2.57 | 2.33 | 21.74 |
| a | 2.60 | 2.43 | 4.43 | 5.00 | 5.00 | 3.60 | 2.83 | 4.67 | 5.75 | 5.75 | 3.17 | 3.17 | 2.00 | 2.25 | 3.75 | 4.00 | 5.33 | 3.14 | 2.60 | 2.83 | 4.43 | 5.00 | 2.83 | 2.33 | 4.00 | 2.67 | 3.33 | 3.33 | 1.43 | 2.29 | 3.53 | 32.99 |
| h | 0.60 | 0.14 | 0.14 | 0.33 | 0.67 | 0.20 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.14 | 0.00 | 0.00 | 0.14 | 0.17 | 0.00 | 0.17 | 0.43 | 0.43 | 0.14 | 1.35 |
| k | 1.60 | 2.43 | 2.29 | 2.50 | 2.83 | 2.20 | 1.67 | 1.17 | 1.25 | 1.25 | 1.00 | 1.00 | 1.29 | 1.25 | 1.00 | 0.86 | 0.00 | 0.43 | 0.60 | 0.50 | 0.43 | 0.29 | 0.33 | 0.00 | 0.14 | 0.50 | 1.17 | 1.67 | 2.29 | 2.43 | 1.21 | 11.32 |
| x | 1.40 | 2.43 | 1.86 | 3.17 | 4.00 | 2.40 | 4.33 | 3.33 | 2.75 | 4.75 | 5.00 | 5.00 | 3.43 | 2.00 | 1.00 | 2.00 | 3.67 | 4.57 | 4.20 | 2.00 | 3.71 | 2.71 | 2.83 | 4.17 | 3.00 | 2.17 | 4.00 | 3.67 | 3.71 | 4.43 | 3.26 | 30.42 |
| o | 5.20 | 6.43 | 6.43 | 5.33 | 6.00 | 6.20 | 4.67 | 4.83 | 7.00 | 5.50 | 4.83 | 3.83 | 4.86 | 7.00 | 8.50 | 7.00 | 4.17 | 4.00 | 3.40 | 3.33 | 4.43 | 5.29 | 5.33 | 6.67 | 7.00 | 5.83 | 4.67 | 5.83 | 6.29 | 6.00 | 5.53 | 51.64 |
| i | 1.60 | 1.86 | 1.29 | 1.83 | 1.33 | 0.80 | 1.33 | 1.50 | 1.50 | 1.25 | 1.50 | 1.67 | 0.86 | 1.50 | 1.00 | 1.71 | 2.00 | 1.57 | 1.40 | 2.17 | 1.57 | 1.00 | 1.00 | 0.83 | 1.00 | 1.17 | 1.33 | 1.67 | 1.71 | 1.57 | 1.42 | 13.24 |
| c | 0.00 | 0.14 | 1.43 | 0.67 | 0.83 | 1.20 | 0.67 | 1.00 | 1.25 | 1.00 | 0.83 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 0.17 | 0.14 | 0.00 | 0.00 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.14 | 0.29 | 0.50 | 4.69 |
| CV | 162.00 | 196.29 | 215.86 | 240.33 | 269.17 | 225.40 | 184.50 | 167.67 | 195.50 | 184.75 | 143.83 | 140.83 | 152.57 | 131.00 | 175.75 | 184.14 | 103.83 | 113.29 | 99.20 | 104.33 | 114.29 | 110.71 | 109.83 | 106.17 | 117.00 | 108.00 | 138.50 | 150.17 | 164.29 | 191.29 | 156.68 | 100 |
| CVn | 98.20 | 130.29 | 139.14 | 151.67 | 164.00 | 151.80 | 142.67 | 119.83 | 138.25 | 120.50 | 89.67 | 84.67 | 63.14 | 60.75 | 88.50 | 89.43 | 40.00 | 51.86 | 38.60 | 40.83 | 49.00 | 34.57 | 42.00 | 54.17 | 70.57 | 66.50 | 87.83 | 93.33 | 100.86 | 120.43 | 90.77 | 57.93 |
| CVs | 63.80 | 66.00 | 76.71 | 88.67 | 105.17 | 73.60 | 41.83 | 47.83 | 57.25 | 64.25 | 54.17 | 56.17 | 89.43 | 70.25 | 87.25 | 94.71 | 63.83 | 61.43 | 60.60 | 63.50 | 65.29 | 76.14 | 67.83 | 52.00 | 46.43 | 41.50 | 50.67 | 56.83 | 63.43 | 70.86 | 65.91 | 42.07 |
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