Solar Flare Watch2013: sunspot number and solar flux
| Month | Sunspot number | F10.7 flux |
|---|---|---|
| January | 99.9 | 126.8 |
| February | 60.1 | 104.4 |
| March | 81.1 | 111.4 |
| April | 112.8 | 125.0 |
| May | 125.6 | 131.4 |
| June | 80.2 | 110.7 |
| July | 86.2 | 115.5 |
| August | 90.2 | 114.9 |
| September | 55.0 | 102.8 |
| October | 127.2 | 132.9 |
| November | 125.7 | 148.8 |
| December | 118.3 | 148.1 |
About this page
Monthly sunspot number and 10.7 cm solar radio flux in 2013, from NOAA SWPC solar-cycle data.