Statistics of sunspot activity
April, 2013
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 | 83.67 | 97.33 | 119.33 | 106.33 | 115.33 | 113.00 | 100.33 | 127.67 | 135.50 | 147.33 | 125.33 | 129.33 | 140.00 | 109.33 | 95.33 | 85.00 | 91.00 | 83.00 | 89.67 | 94.00 | 72.67 | 95.50 | 79.67 | 99.00 | 103.67 | 100.00 | 111.67 | 96.33 | 120.00 | 155.33 | 107.39 | 100 |
| Wn | 37.33 | 53.33 | 63.00 | 65.67 | 68.00 | 84.33 | 74.00 | 95.00 | 99.00 | 90.33 | 74.67 | 80.33 | 82.67 | 41.67 | 23.33 | 13.33 | 13.00 | 7.33 | 34.67 | 63.67 | 61.00 | 76.50 | 63.00 | 72.00 | 76.67 | 72.00 | 62.33 | 45.67 | 45.33 | 64.00 | 60.11 | 55.97 |
| Ws | 46.33 | 44.00 | 56.33 | 40.67 | 47.33 | 28.67 | 26.33 | 32.67 | 36.50 | 57.00 | 50.67 | 49.00 | 57.33 | 67.67 | 72.00 | 71.67 | 78.00 | 75.67 | 55.00 | 30.33 | 11.67 | 19.00 | 16.67 | 27.00 | 27.00 | 28.00 | 49.33 | 50.67 | 74.67 | 91.33 | 47.28 | 44.03 |
| n | 6.00 | 6.67 | 7.67 | 6.67 | 7.67 | 7.33 | 6.33 | 7.67 | 8.00 | 8.00 | 6.33 | 6.00 | 6.33 | 6.00 | 5.67 | 4.67 | 5.00 | 4.67 | 6.67 | 6.00 | 3.33 | 4.00 | 4.33 | 5.67 | 7.33 | 6.67 | 7.00 | 5.00 | 6.67 | 6.67 | 6.20 | 100 |
| A | 1.00 | 0.67 | 2.33 | 1.00 | 1.67 | 1.33 | 1.67 | 1.00 | 1.50 | 0.67 | 0.00 | 0.33 | 0.33 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 1.33 | 0.67 | 0.00 | 0.50 | 0.33 | 0.67 | 1.00 | 1.00 | 1.67 | 0.33 | 0.67 | 1.33 | 0.78 | 12.54 |
| B | 0.67 | 1.00 | 0.67 | 2.00 | 1.33 | 0.00 | 0.67 | 0.33 | 0.50 | 1.00 | 0.33 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 1.33 | 0.67 | 0.00 | 1.00 | 1.33 | 0.67 | 0.00 | 1.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.51 | 8.15 |
| C | 0.67 | 2.33 | 1.33 | 2.33 | 1.33 | 3.67 | 2.00 | 2.67 | 2.00 | 1.67 | 1.00 | 0.33 | 0.33 | 0.33 | 2.00 | 1.33 | 2.00 | 1.00 | 1.67 | 1.67 | 0.67 | 0.50 | 0.33 | 0.67 | 0.67 | 1.33 | 0.67 | 0.67 | 1.33 | 0.33 | 1.29 | 20.88 |
| D | 1.33 | 0.67 | 1.67 | 0.33 | 1.67 | 1.67 | 1.00 | 2.33 | 3.50 | 3.33 | 3.00 | 3.33 | 2.67 | 3.67 | 1.33 | 2.00 | 2.67 | 1.67 | 0.33 | 2.33 | 1.33 | 1.00 | 0.00 | 0.67 | 2.33 | 1.67 | 1.00 | 1.33 | 1.00 | 2.67 | 1.78 | 28.76 |
| E | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.67 | 0.33 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 1.00 | 0.67 | 0.00 | 0.33 | 0.67 | 0.33 | 0.00 | 1.33 | 1.33 | 0.29 | 4.66 |
| 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 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 1.00 | 0.67 | 0.00 | 0.33 | 0.67 | 0.00 | 0.00 | 0.10 | 1.61 |
| G | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 0.33 | 0.07 | 1.08 |
| H | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.50 | 0.33 | 0.33 | 0.33 | 0.00 | 0.33 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.14 | 2.24 |
| I | 2.00 | 1.67 | 1.67 | 1.00 | 1.67 | 0.67 | 0.33 | 0.67 | 0.00 | 1.00 | 1.33 | 1.33 | 2.33 | 0.67 | 1.33 | 0.67 | 0.33 | 2.00 | 2.00 | 0.67 | 0.67 | 0.00 | 1.33 | 2.00 | 2.33 | 0.67 | 2.33 | 2.00 | 2.00 | 0.67 | 1.24 | 20.07 |
| x | 1.67 | 1.67 | 3.00 | 3.00 | 3.00 | 1.33 | 2.33 | 1.33 | 2.00 | 1.67 | 0.33 | 0.33 | 0.33 | 0.33 | 0.00 | 0.33 | 0.00 | 0.00 | 2.67 | 1.33 | 0.00 | 1.50 | 1.67 | 1.33 | 1.00 | 2.00 | 1.67 | 0.33 | 1.00 | 1.33 | 1.28 | 20.70 |
| r | 1.00 | 0.00 | 1.00 | 0.00 | 0.67 | 0.67 | 0.00 | 1.33 | 0.00 | 0.33 | 0.00 | 0.33 | 0.67 | 0.33 | 0.33 | 0.00 | 0.00 | 0.33 | 2.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.67 | 1.67 | 0.33 | 1.00 | 0.33 | 0.00 | 0.67 | 0.48 | 7.71 |
| s | 1.33 | 2.67 | 1.33 | 2.00 | 1.67 | 2.33 | 1.00 | 2.00 | 3.00 | 2.00 | 2.33 | 1.67 | 3.00 | 3.00 | 2.67 | 1.67 | 3.00 | 3.00 | 0.67 | 1.67 | 1.33 | 0.50 | 1.33 | 1.00 | 2.00 | 1.67 | 1.67 | 2.33 | 2.67 | 1.00 | 1.92 | 30.91 |
| a | 1.00 | 1.33 | 1.33 | 0.67 | 1.33 | 2.00 | 2.33 | 2.00 | 2.00 | 2.67 | 2.00 | 2.00 | 2.33 | 2.00 | 2.33 | 2.33 | 2.00 | 1.33 | 1.33 | 2.00 | 1.00 | 1.00 | 0.33 | 1.67 | 1.33 | 0.67 | 1.67 | 1.67 | 1.00 | 1.33 | 1.60 | 25.81 |
| h | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.50 | 0.00 | 0.67 | 0.33 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.33 | 0.67 | 0.00 | 0.00 | 0.67 | 1.00 | 0.18 | 2.96 |
| k | 1.00 | 0.67 | 1.00 | 1.00 | 1.00 | 1.00 | 0.67 | 0.33 | 0.50 | 1.33 | 1.00 | 1.33 | 0.00 | 0.00 | 0.33 | 0.33 | 0.00 | 0.00 | 0.00 | 0.33 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.33 | 1.00 | 0.33 | 1.33 | 1.33 | 0.74 | 11.92 |
| x | 3.33 | 2.67 | 4.00 | 2.00 | 3.33 | 2.00 | 2.00 | 2.33 | 2.00 | 2.00 | 1.67 | 2.00 | 2.67 | 1.00 | 1.33 | 1.33 | 0.33 | 2.00 | 3.33 | 1.33 | 0.67 | 0.50 | 1.67 | 2.67 | 3.33 | 2.00 | 4.33 | 2.33 | 2.67 | 2.00 | 2.16 | 34.86 |
| o | 2.33 | 3.67 | 3.67 | 4.00 | 3.67 | 4.00 | 3.33 | 3.67 | 3.50 | 3.67 | 2.67 | 2.33 | 1.33 | 3.33 | 3.00 | 2.67 | 3.67 | 1.33 | 3.33 | 3.67 | 1.33 | 2.50 | 1.67 | 2.00 | 2.33 | 3.00 | 1.00 | 0.67 | 1.67 | 2.00 | 2.70 | 43.55 |
| i | 0.33 | 0.33 | 0.00 | 0.67 | 0.67 | 1.33 | 1.00 | 0.67 | 1.50 | 1.33 | 1.33 | 1.00 | 1.00 | 1.00 | 0.67 | 0.67 | 0.67 | 1.33 | 0.00 | 1.00 | 0.67 | 0.00 | 0.33 | 0.33 | 1.00 | 0.00 | 0.67 | 0.67 | 1.33 | 0.67 | 0.74 | 11.92 |
| c | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.00 | 1.00 | 1.00 | 0.67 | 0.67 | 1.33 | 0.67 | 0.67 | 0.00 | 0.33 | 0.00 | 0.00 | 0.00 | 0.67 | 1.00 | 0.67 | 0.67 | 0.67 | 1.67 | 1.00 | 1.33 | 1.00 | 2.00 | 0.60 | 9.68 |
| CV | 77.33 | 87.00 | 88.67 | 74.67 | 95.67 | 106.00 | 78.67 | 125.67 | 150.00 | 149.67 | 153.00 | 143.67 | 110.33 | 128.33 | 100.67 | 75.00 | 87.00 | 66.00 | 32.67 | 80.67 | 88.67 | 83.00 | 72.33 | 89.00 | 132.67 | 144.67 | 107.33 | 92.00 | 150.00 | 181.00 | 105.04 | 100 |
| CVn | 23.33 | 34.33 | 30.67 | 24.33 | 41.00 | 64.00 | 49.67 | 83.33 | 99.00 | 87.67 | 78.33 | 80.67 | 65.67 | 50.00 | 21.00 | 8.67 | 11.00 | 6.67 | 10.00 | 68.33 | 79.33 | 75.50 | 70.00 | 78.00 | 102.00 | 113.67 | 47.00 | 44.67 | 51.33 | 52.67 | 55.06 | 52.42 |
| CVs | 54.00 | 52.67 | 58.00 | 50.33 | 54.67 | 42.00 | 29.00 | 42.33 | 51.00 | 62.00 | 74.67 | 63.00 | 44.67 | 78.33 | 79.67 | 66.33 | 76.00 | 59.33 | 22.67 | 12.33 | 9.33 | 7.50 | 2.33 | 11.00 | 30.67 | 31.00 | 60.33 | 47.33 | 98.67 | 128.33 | 49.98 | 47.58 |
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