Viewing archive of Tuesday, 28 April 2026
Geophysical report
Solar and Geophysical Activity Summary 2026 Apr 28 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 118 Issued at 0245Z on 28 Apr 2026 This report is compiled from data received at SWO on 27 AprA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0128 0137 0142 4420 C4.6 430 0209 0215 0218 4420 C6.5 110 0330 0337 0341 4420 C5.9 110 0639 0645 0650 4425 N06E44 M1.0 Sf 0938 0938 0938 120
B. Proton Events
None
C. Geomagnetic Activity Summary
Field activity was at quiet to
unsettled levels.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 142 SSN 122 Afr/Ap 006/007 X-ray Background B7.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.0e+05 GT 10 MeV 1.8e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.40e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) 3 Hour K-indices Boulder 2 2 1 2 2 2 ? ? Planetary 3 2 1 1 2 2 ? 1
F. Comments
None
All times in UTC
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Latest forum messages
Current Farside Activity 611Incoming & Unnumbered Active Regions 416Incoming AR 4452 (old 4432) 4Coronal Hole 53 105Unspecified geomagnetic activity 275
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Space weather facts
| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/05/22 | M2.3 |
| 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 | 89.2 +9.9 |
| Last 30 days | 95.5 +2.6 |
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