Viewing archive of Tuesday, 21 May 2024
Geophysical report
Solar and Geophysical Activity Summary 2024 May 21 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 142 Issued at 0245Z on 21 May 2024 This report is compiled from data received at SWO on 20 MayA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0449 0449 0449 290 0757 0757 0758 870 0836 0836 0836 270 1407 1409 1409 250 1418 1418 1420 540 1739 1741 1744 3683 S20W66 Sf 120 1914 1914 1914 330 1942 1942 1942 150 1945 1945 1945 190 2005 2005 2005 120 2036 2036 2037 100 2234 2234 2234 150 2311 2311 2311 100
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 200 SSN 124 Afr/Ap 010/008 X-ray Background C1.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.9e+06 GT 10 MeV 3.1e+04 p/(cm2-ster-day) (GOES-18 satellite synchronous orbit W137 degrees) Daily Electron Fluence GT 2 MeV 1.30e+07 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 3 3 2 3 3 1 3 Planetary 2 3 3 1 2 2 2 3
F. Comments
None.
All times in UTC
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Space weather facts
| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/04 | M7.6 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 133.3 +47.4 |
| Last 30 days | 96.1 +32 |
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