Below you'll find a daily report brought to you by the NOAA about the solar activity and geophysical activity during the past day and the prediction for the coming days. This page is daily updated around midnight.
Solar and Geophysical Activity Summary 2025 Dec 18 0245 UTCBegin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0227 0227 0227 120
10 cm 119 SSN 068 Afr/Ap 010/018 X-ray Background B6.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 8.4e+05 GT 10 MeV 1.4e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 4.00e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 3 3 3 2 3 3 4 Planetary 3 3 3 2 3 3 4 5
None
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/12 | M1.1 |
| Last geomagnetic storm | 2025/12/12 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 128 +36.2 |
| Last 30 days | 108.4 +15.8 |