Viewing archive of Tuesday, 31 May 2011
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 2011 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 2011 This report is compiled from data received at SWO on 30 MayA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0247 0252 0255 1224 C3.2 26 0559 0605 0607 1226 S23E51 C7.0 Sn 100 86 1048 1101 1122 1227 S18E60 C2.8 Sn II
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was quiet to
active during the past 24 hours.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 112 SSN 105 Afr/Ap 007/009 X-ray Background B4.5 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 7.3e+05 GT 10 MeV 1.2e+04 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 6.80e+08 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 2 2 2 4 2 2 2 2 Planetary 3 2 1 3 2 2 2 3
F. Comments
The greater than 2 MeV electron fluence at geosynchronous orbit was at high levels.
Latest news
Saturday, 4 May 2024
Sunspot region 3663, X1 solar flare
Monday, 22 April 2024
Lot's of sunspots! Big chance for major flare activity?
Saturday, 23 March 2024
X1.1 solar flare with earth-directed CME
Latest forum messages
AR3663 93Weakening of Earths magnetic field due to geomagnetic excursion 6Does anyone know what happened to solarham.net? 10AR3666 Beta-Gamma-Delta 7Sporadic E and Flare activity 18
More topicsSupport SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Space weather facts
| Last X-flare | 2024/05/03 | X1.6 |
| Last M-flare | 2024/05/04 | M1.2 |
| Last geomagnetic storm | 2024/05/02 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2024 | 136.5 +31.6 |
| Last 30 days | 151.9 +56.5 |