Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0451 0512 0540 3234 M1.4 120 0828 0831 0831 220 0834 0835 0835 140 0856 0856 0856 120 1022 1027 1042 3230 C3.2 110 1336 1350 1358 3234 N27E57 M2.6 Sf
10 cm 152 SSN 100 Afr/Ap 004/005 X-ray Background C1.2 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.5e+06 GT 10 MeV 2.2e+04 p/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 3.50e+06 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder ? ? ? ? ? ? ? ? Planetary 1 0 1 1 2 1 2 2
BOU magnetometer has been offline since 17 Feb 2023.
All times in UTC
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| Last X-flare | 2026/01/18 | X1.9 |
| Last M-flare | 2026/01/21 | M3.4 |
| Last geomagnetic storm | 2026/01/22 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| January 2026 | 117.9 -6.1 |
| Last 30 days | 121.2 +12.1 |