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 04 0245 UTCBegin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0059 0059 0059 160 0120 0131 0136 4299 N24E44 C4.1 Sf 1700 0139 0139 0139 240 0149 0153 0155 4600 0216 0223 0226 4297 C2.7 160 0216 0216 0216 140 0246 0246 0246 160 0329 0329 0329 440 0519 0519 0519 330 0532 0532 0532 2600 0646 0646 0646 23000 1008 1008 1008 280 1404 1409 1411 C3.8 1200 2327 2327 2327 140
10 cm 209 SSN 227 Afr/Ap 020/033 X-ray Background C1.6 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 4.2e+06 GT 10 MeV 1.6e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.20e+08 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 1 2 2 5 5 4 5 4 Planetary 2 3 2 3 5 4 7 5
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| Last X-flare | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/04 | M6.0 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| October 2025 | 114.6 -15.2 |
| December 2025 | 186 +71.4 |
| Last 30 days | 106.3 +12.6 |