Viewing archive of Thursday, 28 May 2026
Geophysical report
Solar and Geophysical Activity Summary 2026 May 28 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 148 Issued at 0245Z on 28 May 2026 This report is compiled from data received at SWO on 27 MayA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 1207 1216 1219 4446 C3.4 3800 2059 2100 2100 250 2130 2130 2130 110
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to
unsettled
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 142 SSN 165 Afr/Ap 012/011 X-ray Background B7.8 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 9.3e+05 GT 10 MeV 4.8e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.60e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) 3 Hour K-indices Boulder 3 3 4 2 3 4 2 3 Planetary 2 2 3 2 1 3 3 3
F. Comments
None
All times in UTC
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Latest forum messages
Unspecified geomagnetic activity 284Incoming & Unnumbered Active Regions 440Forum messages 18AR4455 24AR4446 (including AR4448/4449) 46
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Space weather facts
| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/05/29 | M1.1 |
| Last geomagnetic storm | 2026/05/16 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2026 | 79.3 -6.6 |
| May 2026 | 99.1 +19.8 |
| Last 30 days | 99.1 +7.5 |
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