Viewing archive of Wednesday, 31 December 2025
Geophysical report
Solar and Geophysical Activity Summary 2025 Dec 31 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 365 Issued at 0245Z on 31 Dec 2025 This report is compiled from data received at SWO on 30 DecA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 1456 1456 1456 250
B. Proton Events
None
C. Geomagnetic Activity Summary
Field levels were at quiet to
unsettled levels.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 182 SSN 141 Afr/Ap 005/008 X-ray Background C1.6 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.9e+06 GT 10 MeV 1.5e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.60e+08 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 1 2 2 1 3 3 2 2 Planetary 2 2 2 2 3 3 2 1
F. Comments
None
All times in UTC
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Space weather facts
| Last X-flare | 2026/01/18 | X1.9 |
| Last M-flare | 2026/01/21 | M3.4 |
| Last geomagnetic storm | 2026/01/28 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| December 2025 | 124 +32.2 |
| January 2026 | 119.2 -4.8 |
| Last 30 days | 119.5 +1.5 |