Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0200 0200 0200 140 0843 0843 0843 800 1318 1318 1318 250 1322 1322 1322 100 1341 1341 1341 100 1344 1344 1345 400 1521 1521 1521 230 1752 1752 1752 110 1916 1916 1916 110 2253 2253 2253 170 2340 2340 2340 130
10 cm 161 SSN 192 Afr/Ap 060/109 X-ray Background C1.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 7.1e+07 GT 10 MeV 2.3e+05 p/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 2.40e+06 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder ? ? ? ? ? ? ? ? Planetary 4 5 7 8 7 8 7 5
The BOU magnetometer has been offline since 13 Feb 2023.
All times in UTC
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| Last X-flare | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/09 | M1.5 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 157.7 +65.9 |
| Last 30 days | 108.9 +11.4 |