Viewing archive of Tuesday, 21 May 2013
Geophysical report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Solar and Geophysical Activity Summary 2013 May 21 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 141 Issued at 0245Z on 21 May 2013 This report is compiled from data received at SWO on 20 MayA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0516 0525 0603 M1.7 1111 1116 1155 1748 N12W06 Sf 120 1141 1143 II 1459 1506 1510 1748 N13W08 C9.6 1b 300 1620 1626 1630 1748 N13W09 C6.0 Sn 110 1821 1821 1821 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 132 SSN 113 Afr/Ap 006/008 X-ray Background B7.0 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 7.0e+06 GT 10 MeV 2.0e+05 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 2.20e+06 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 3 1 0 1 3 2 2 3 Planetary 2 1 0 1 2 3 3 3
F. Comments
None
All times in UTC
Latest news
Friday, 14 November 2025
X4.0 solar flare
Tuesday, 11 November 2025
X5.1 solar flare, G4 geomagnetic storm watch
Monday, 10 November 2025
X1.2 solar flare with earth-directed CME
Latest forum messages
AR4274 X4.0 CME discussion 58AR 14274 CMES (featuring X5 full halo) 1421Space Weather Analyst 8Sunspot region 4274 808Filaments and prominences 384
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Solar activity or if there is a chance to see the aurora, but with more traffic comes higher costs to keep the servers online. If you like SpaceWeatherLive and want to support the project you can choose a subscription for an ad-free site or consider a donation. With your help we can keep SpaceWeatherLive online!
Space weather facts
| Last X-flare | 2025/11/14 | X4.0 |
| Last M-flare | 2025/11/14 | M1.3 |
| Last geomagnetic storm | 2025/11/13 | Kp7+ (G3) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| October 2025 | 114.6 -15.2 |
| November 2025 | 101 -13.6 |
| Last 30 days | 97.2 -37.2 |