Viewing archive of Wednesday, 21 January 2026
Geophysical report
Solar and Geophysical Activity Summary 2026 Jan 21 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 021 Issued at 0245Z on 21 Jan 2026 This report is compiled from data received at SWO on 20 JanA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0119 0119 0119 100 0741 0741 0741 100 0749 0751 0751 120 0749 0749 0749 100 0759 0759 0759 480 1442 1442 1442 110
B. Proton Events
Proton event progressed throughout the period.
GOES-18 >10 MeV flux of 37,000 pfu at 1915Z and >100 MeV flux of
0.545 pfu at 0735 at 1140Z.
C. Geomagnetic Activity Summary
The geomagnetic field reached
severe (Kp=8) levels.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 178 SSN 172 Afr/Ap 091/143 X-ray Background C1.2 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.8e+08 GT 10 MeV 8.4e+06 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.20e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 7 5 7 8 7 5 5 6 Planetary 6 6 8 8 7 7 7 8
F. Comments
None
All times in UTC
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Space weather facts
| Last X-flare | 2026/02/04 | X4.21 |
| Last M-flare | 2026/03/28 | M1.3 |
| Last geomagnetic storm | 2026/03/25 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| March 2026 | 84 +5.8 |
| Last 30 days | 84 +6.2 |