Viewing archive of Friday, 17 April 2026
Geophysical report
Solar and Geophysical Activity Summary 2026 Apr 17 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 107 Issued at 0245Z on 17 Apr 2026 This report is compiled from data received at SWO on 16 AprA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0831 0831 0831 110 1025 1025 1025 110 1030 1030 1030 100 1104 1114 1131 4419 B7.9 140 1138 1138 1138 140 1155 1155 1155 410 1340 1347 1351 4419 B6.3 130 1354 1358 1406 4419 N12E35 B7.3 Sf 100 1453 1453 1453 110 1541 1542 1542 120 1618 1618 1619 110 1634 1634 1634 100 2009 2009 2010 1600
B. Proton Events
None.
C. Geomagnetic Activity Summary
The geomagnetic activity was
quiet.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 108 SSN 065 Afr/Ap 003/??? X-ray Background B3.6 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 6.4e+05 GT 10 MeV 1.7e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 7.30e+07 e/(cm2-ster-day) (GOES-19 satellite synchronous orbit W72 degrees) 3 Hour K-indices Boulder 0 1 1 1 1 2 1 1 Planetary 1 1 1 1 1 0 1 ?
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 | 144.3 +65 |
| Last 30 days | 99 +5.2 |
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