Statistics of sunspot activity
April, 1982
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 | 157.00 | 169.60 | 190.50 | 194.00 | 126.80 | 144.60 | 152.50 | 164.60 | 131.43 | 191.67 | 187.60 | 198.33 | 195.00 | 186.60 | 178.80 | 156.50 | 99.80 | 117.17 | 113.00 | 117.33 | 117.60 | 126.25 | 210.00 | 222.50 | 201.67 | 193.00 | 151.40 | 133.33 | 123.25 | 121.20 | 159.10 | 100 |
| Wn | 77.50 | 96.80 | 85.50 | 94.00 | 67.20 | 75.20 | 76.00 | 72.40 | 62.71 | 95.00 | 92.60 | 98.67 | 92.00 | 85.00 | 78.20 | 75.25 | 48.40 | 44.33 | 40.20 | 66.00 | 77.00 | 109.50 | 190.75 | 196.50 | 174.83 | 159.40 | 117.80 | 96.00 | 86.75 | 72.00 | 93.45 | 58.74 |
| Ws | 79.50 | 72.80 | 105.00 | 100.00 | 59.60 | 69.40 | 76.50 | 92.20 | 68.71 | 96.67 | 95.00 | 99.67 | 103.00 | 101.60 | 100.60 | 81.25 | 51.40 | 72.83 | 72.80 | 51.33 | 40.60 | 16.75 | 19.25 | 26.00 | 26.83 | 33.60 | 33.60 | 37.33 | 36.50 | 49.20 | 65.65 | 41.26 |
| n | 9.00 | 10.40 | 13.50 | 11.00 | 8.00 | 9.80 | 11.25 | 12.20 | 9.14 | 11.67 | 11.60 | 12.33 | 12.00 | 12.60 | 11.80 | 10.50 | 7.80 | 8.50 | 8.20 | 8.00 | 7.20 | 7.25 | 8.50 | 10.33 | 9.50 | 10.20 | 8.20 | 6.67 | 6.75 | 8.00 | 9.73 | 100 |
| A | 1.00 | 2.00 | 2.00 | 1.00 | 0.60 | 0.20 | 1.00 | 3.00 | 1.14 | 1.00 | 2.00 | 2.67 | 2.20 | 2.00 | 3.00 | 1.75 | 1.40 | 2.50 | 1.20 | 0.67 | 0.20 | 0.50 | 0.25 | 0.50 | 1.00 | 1.80 | 0.80 | 0.00 | 0.50 | 1.00 | 1.30 | 13.32 |
| B | 1.75 | 0.80 | 2.25 | 1.33 | 0.40 | 0.40 | 1.50 | 0.00 | 0.43 | 0.67 | 0.60 | 2.33 | 1.80 | 2.20 | 1.00 | 0.25 | 0.20 | 0.00 | 0.00 | 0.00 | 0.60 | 1.00 | 1.00 | 2.50 | 0.83 | 1.40 | 0.80 | 0.00 | 0.00 | 1.20 | 0.91 | 9.33 |
| C | 2.75 | 2.40 | 3.25 | 1.00 | 1.40 | 1.80 | 3.25 | 2.20 | 1.43 | 2.00 | 1.80 | 2.33 | 3.20 | 2.20 | 2.20 | 1.25 | 1.20 | 1.00 | 1.60 | 1.67 | 1.60 | 1.75 | 2.75 | 2.17 | 2.17 | 1.40 | 0.80 | 0.33 | 1.00 | 1.00 | 1.83 | 18.81 |
| D | 1.75 | 2.80 | 2.75 | 4.00 | 2.40 | 2.80 | 1.00 | 1.80 | 2.29 | 3.67 | 3.20 | 1.67 | 1.00 | 1.40 | 1.60 | 2.50 | 1.00 | 1.00 | 1.60 | 2.00 | 2.80 | 1.75 | 1.50 | 2.00 | 1.50 | 1.40 | 0.80 | 1.33 | 2.00 | 1.20 | 1.95 | 20.04 |
| E | 0.75 | 0.40 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.60 | 1.00 | 0.80 | 0.40 | 0.60 | 0.25 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 1.25 | 1.00 | 1.17 | 1.20 | 0.40 | 0.00 | 0.00 | 0.20 | 0.37 | 3.84 |
| F | 0.00 | 0.40 | 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.14 |
| G | 0.00 | 0.20 | 1.00 | 1.00 | 0.60 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 0.60 | 0.40 | 0.75 | 0.20 | 0.17 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 1.20 | 2.40 | 2.67 | 1.25 | 1.00 | 0.48 | 4.96 |
| H | 0.00 | 0.00 | 0.25 | 0.33 | 0.00 | 0.40 | 0.25 | 0.00 | 0.14 | 0.33 | 1.00 | 0.33 | 1.20 | 1.40 | 0.80 | 0.50 | 1.00 | 1.00 | 1.40 | 2.00 | 0.80 | 0.75 | 0.75 | 0.67 | 0.17 | 0.40 | 0.40 | 0.67 | 0.50 | 0.40 | 0.59 | 6.11 |
| I | 1.00 | 1.40 | 2.00 | 1.67 | 2.60 | 4.20 | 4.25 | 5.20 | 3.71 | 3.67 | 2.40 | 2.00 | 1.60 | 2.40 | 2.20 | 3.25 | 2.80 | 2.83 | 2.20 | 1.33 | 1.20 | 1.50 | 1.00 | 1.50 | 2.17 | 1.40 | 1.80 | 1.67 | 1.50 | 2.00 | 2.28 | 23.45 |
| x | 2.75 | 2.80 | 4.25 | 2.33 | 1.00 | 0.60 | 2.50 | 3.00 | 1.57 | 1.67 | 2.60 | 5.00 | 4.00 | 4.20 | 4.00 | 2.00 | 1.60 | 2.50 | 1.20 | 0.67 | 0.80 | 1.50 | 1.25 | 3.00 | 1.83 | 3.20 | 1.60 | 0.00 | 0.50 | 2.20 | 2.20 | 22.65 |
| r | 2.50 | 1.00 | 1.25 | 0.33 | 0.20 | 1.20 | 1.25 | 0.60 | 0.14 | 0.33 | 1.20 | 0.00 | 0.40 | 0.20 | 0.00 | 1.25 | 1.20 | 0.17 | 0.20 | 0.33 | 0.20 | 1.25 | 0.50 | 0.50 | 0.67 | 0.20 | 0.00 | 0.00 | 0.25 | 0.40 | 0.59 | 6.07 |
| s | 2.25 | 3.20 | 4.50 | 3.67 | 4.80 | 5.60 | 5.75 | 6.20 | 5.71 | 6.00 | 3.60 | 4.67 | 4.00 | 3.40 | 2.20 | 3.25 | 2.20 | 3.33 | 4.20 | 2.33 | 3.00 | 2.50 | 2.50 | 1.83 | 2.83 | 3.40 | 2.20 | 2.00 | 3.00 | 2.60 | 3.56 | 36.57 |
| a | 0.75 | 2.40 | 2.25 | 4.00 | 1.80 | 2.00 | 1.25 | 2.00 | 1.14 | 3.33 | 2.40 | 1.33 | 1.20 | 2.20 | 3.60 | 2.75 | 1.80 | 1.00 | 1.20 | 2.00 | 1.00 | 0.25 | 1.25 | 1.83 | 1.83 | 0.80 | 1.80 | 3.33 | 2.25 | 1.80 | 1.89 | 19.38 |
| h | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.40 | 0.50 | 0.40 | 0.57 | 0.33 | 1.20 | 0.67 | 1.80 | 1.80 | 1.20 | 1.25 | 1.00 | 1.00 | 1.40 | 2.33 | 2.20 | 1.75 | 1.75 | 1.17 | 0.83 | 0.80 | 0.40 | 0.33 | 0.25 | 0.40 | 0.87 | 8.90 |
| k | 0.75 | 1.00 | 1.00 | 0.67 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.60 | 0.67 | 0.60 | 0.80 | 0.80 | 0.00 | 0.00 | 0.50 | 0.00 | 0.33 | 0.00 | 0.00 | 1.25 | 2.00 | 1.50 | 1.80 | 2.20 | 1.00 | 0.50 | 0.60 | 0.63 | 6.43 |
| x | 2.00 | 3.40 | 4.25 | 3.00 | 3.20 | 4.80 | 5.50 | 8.20 | 5.00 | 5.00 | 5.40 | 5.00 | 5.00 | 5.80 | 6.00 | 5.50 | 5.20 | 6.33 | 4.80 | 4.00 | 2.20 | 2.75 | 2.00 | 2.67 | 3.33 | 3.60 | 3.00 | 2.33 | 2.50 | 3.40 | 4.17 | 42.88 |
| o | 6.25 | 6.20 | 8.25 | 7.00 | 4.60 | 4.40 | 5.00 | 4.00 | 4.00 | 6.00 | 4.80 | 6.33 | 6.20 | 5.80 | 5.20 | 4.25 | 2.60 | 2.00 | 2.60 | 4.00 | 4.40 | 2.75 | 4.50 | 5.17 | 4.67 | 5.40 | 4.60 | 3.67 | 3.50 | 3.80 | 4.73 | 48.63 |
| i | 0.50 | 0.60 | 1.00 | 1.00 | 0.20 | 0.60 | 0.75 | 0.00 | 0.14 | 0.67 | 1.00 | 1.00 | 0.80 | 1.00 | 0.60 | 0.75 | 0.00 | 0.17 | 0.80 | 0.00 | 0.60 | 1.75 | 1.50 | 2.50 | 1.50 | 1.20 | 0.60 | 0.67 | 0.75 | 0.80 | 0.78 | 8.03 |
| c | 0.25 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.05 | 0.46 |
| CV | 103.50 | 141.80 | 170.00 | 172.33 | 113.00 | 130.20 | 113.75 | 125.40 | 124.29 | 156.67 | 186.80 | 153.00 | 177.00 | 189.60 | 166.00 | 157.75 | 98.20 | 119.17 | 135.60 | 177.00 | 163.40 | 129.25 | 192.75 | 196.50 | 175.67 | 189.40 | 174.20 | 144.00 | 122.25 | 114.60 | 150.44 | 100 |
| CVn | 54.00 | 99.60 | 97.25 | 101.67 | 67.60 | 78.20 | 59.25 | 60.80 | 66.29 | 83.67 | 110.40 | 100.00 | 115.00 | 109.60 | 98.40 | 85.25 | 52.40 | 55.83 | 76.40 | 113.00 | 113.80 | 118.50 | 175.50 | 181.33 | 160.33 | 151.00 | 143.20 | 118.33 | 97.50 | 73.20 | 100.58 | 66.86 |
| CVs | 49.50 | 42.20 | 72.75 | 70.67 | 45.40 | 52.00 | 54.50 | 64.60 | 58.00 | 73.00 | 76.40 | 53.00 | 62.00 | 80.00 | 67.60 | 72.50 | 45.80 | 63.33 | 59.20 | 64.00 | 49.60 | 10.75 | 17.25 | 15.17 | 15.33 | 38.40 | 31.00 | 25.67 | 24.75 | 41.40 | 49.86 | 33.14 |
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