Solar Flare Watch2009: sunspot number and solar flux
| Month | Sunspot number | F10.7 flux |
|---|---|---|
| January | 2.8 | 69.7 |
| February | 2.5 | 69.8 |
| March | 0.8 | 69.1 |
| April | 1.3 | 69.6 |
| May | 4.0 | 70.4 |
| June | 6.6 | 68.6 |
| July | 5.1 | 68.2 |
| August | 0.4 | 67.4 |
| September | 6.7 | 70.3 |
| October | 7.0 | 72.1 |
| November | 7.7 | 73.7 |
| December | 15.8 | 76.8 |
About this page
Monthly sunspot number and 10.7 cm solar radio flux in 2009, from NOAA SWPC solar-cycle data.