Solar Flare Watch2018: sunspot number and solar flux
| Month | Sunspot number | F10.7 flux |
|---|---|---|
| January | 5.8 | 70.0 |
| February | 11.5 | 71.6 |
| March | 2.4 | 68.3 |
| April | 6.8 | 70.0 |
| May | 13.1 | 71.0 |
| June | 14.5 | 72.7 |
| July | 0.4 | 69.6 |
| August | 8.4 | 69.0 |
| September | 2.7 | 68.2 |
| October | 4.5 | 69.6 |
| November | 3.9 | 69.0 |
| December | 3.5 | 70.0 |
About this page
Monthly sunspot number and 10.7 cm solar radio flux in 2018, from NOAA SWPC solar-cycle data.