Viewing archive of Sunday, 31 May 2026
Geophysical report
Solar and Geophysical Activity Summary 2026 May 31 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 151 Issued at 0245Z on 31 May 2026 This report is compiled from data received at SWO on 30 MayA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0524 0524 0524 840 1145 1153 1155 4446 S17W17 C4.7 1n 160 1640 1640 1640 150
B. Proton Events
None.
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to
active.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 142 SSN 133 Afr/Ap 013/015 X-ray Background B7.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.5e+05 GT 10 MeV 2.0e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.50e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) 3 Hour K-indices Boulder 4 3 2 2 2 3 3 3 Planetary 3 3 1 2 2 2 4 4
F. Comments
None.
All times in UTC
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Space weather facts
| Last X-flare | 2026/06/03 | X1.0 |
| Last M-flare | 2026/06/03 | M7.9 |
| 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 |
| June 2026 | 140 +60.7 |
| Last 30 days | 97 +3.2 |
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