Solar Flare WatchSunspot number and solar flux since 1997
Last updated:
| Year | Sunspot number | F10.7 flux |
|---|---|---|
| 2026 | 89.9 | 128.8 |
| 2025 | 119.7 | 154.6 |
| 2024 | 147.2 | 190.7 |
| 2023 | 118.0 | 159.9 |
| 2022 | 78.1 | 124.6 |
| 2021 | 29.9 | 81.8 |
| 2020 | 8.2 | 73.8 |
| 2019 | 3.6 | 69.7 |
| 2018 | 6.4 | 69.9 |
| 2017 | 19.4 | 77.5 |
| 2016 | 36.8 | 88.9 |
| 2015 | 70.4 | 118.0 |
| 2014 | 121.5 | 146.5 |
| 2013 | 96.9 | 122.7 |
| 2012 | 81.7 | 120.1 |
| 2011 | 79.8 | 114.2 |
| 2010 | 25.6 | 79.9 |
| 2009 | 5.1 | 70.5 |
| 2008 | 4.6 | 68.9 |
| 2007 | 12.8 | 73.1 |
| 2006 | 26.1 | 80.6 |
| 2005 | 48.8 | 94.5 |
| 2004 | 68.6 | 116.4 |
| 2003 | 109.0 | – |
| 2002 | 176.7 | – |
| 2001 | 170.2 | – |
| 2000 | 172.9 | – |
| 1999 | 136.1 | – |
| 1998 | 88.5 | – |
| 1997 | 30.6 | – |
Method
Flares: GOES primary satellite X-ray flare list (7 days), kept in an archive by this site so that daily logs remain available. Regions: SWPC solar region summary for the latest observation date. Solar cycle: SWPC observed solar-cycle indices (monthly sunspot number from NOAA SWPC and F10.7 flux). Values are not modified.
About this page
Monthly sunspot number (NOAA SWPC) and 10.7 cm solar radio flux by year since 1997, with a chart of the current solar cycle, from NOAA SWPC.