Viewing archive of Thursday, 11 December 2025
Geophysical report
Solar and Geophysical Activity Summary 2025 Dec 11 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 345 Issued at 0245Z on 11 Dec 2025 This report is compiled from data received at SWO on 10 DecA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0120 0125 0130 4294 S15W58 C7.8 Sf 2200 0417 0422 0427 4294 S14W60 M1.2 Sf 0431 0431 0431 140 0546 0546 0546 2900 0548 0548 0548 110 0731 0737 0742 4294 S15W62 M1.9 1n 0946 0955 1002 M1.0 0951 0951 0951 4294 110 1022 1029 1043 4294 S17W68 C4.1 Sf 1800 1114 1114 1114 210 1235 1235 1235 100 1315 1316 1322 4304 N23W31 Sf 2300 1332 1343 1349 4294 S22W62 M1.6 Sf 120 II 1421 1421 1422 190 1456 1505 1514 4294 C3.4 110 1724 1724 1724 110 1741 1741 1741 100 1754 1754 1754 120 2158 2208 2214 4294 S20W66 M4.4 2b 27000 520 II 2228 2228 2229 100
B. Proton Events
None.
C. Geomagnetic Activity Summary
The geomagnetic activity reached
Major Storm (Kp=6) levels.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 168 SSN 134 Afr/Ap 016/021 X-ray Background C1.7 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.8e+06 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 1 3 3 2 3 3 6 Planetary 3 2 3 2 2 2 3 6
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 | 119.3 -4.7 |
| Last 30 days | 120.3 +3.4 |