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
Latest news
Monday, 19 January 2026
CME impact! S4 solar radiation storm
Sunday, 18 January 2026
X1.9 solar flare with earth-directed CME
Wednesday, 31 December 2025
Happy New Year! Celebrate with an M7.1 solar flare!
Latest forum messages
CH 17 14Do the high-resolution sunspot counts point to more complex sunspots? 36Broad-spectrum aurora pillars 44AR 4357 3Forum alert bar hidden at the bottom 4
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Solar activity or if there is a chance to see the aurora, but with more traffic comes higher costs to keep the servers online. If you like SpaceWeatherLive and want to support the project you can choose a subscription for an ad-free site or consider a donation. With your help we can keep SpaceWeatherLive online!
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 | 119.2 +0.9 |