Viewing archive of Wednesday, 28 September 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 Sep 28 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 271 Issued at 0245Z on 28 Sep 2011 This report is compiled from data received at SWO on 27 SepA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0000 1010 IV 0000 0413 IV 0442 0450 0519 1302 N14E21 Sf IV 0803 1627 IV 1049 1054 1057 C1.8 IV 1124 1124 1124 180 1630 1630 1630 550 1635 2359 IV 1754 1754 1754 280 1756 1756 1756 530 1805 1810 1822 1302 N14E14 C1.1 Sf 220 1914 1914 1914 160 1934 1934 1934 120 1950 1950 1950 110 2044 2058 2111 1302 C6.4 400 2245 2250 2254 C1.7 IV
B. Proton Events
None
C. Geomagnetic Activity Summary
Activity ranged from unsettled to
severe storm levels.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 139 SSN 082 Afr/Ap 022/030 X-ray Background B5.2 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 2.9e+07 GT 10 MeV 5.9e+05 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 2.10e+07 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 6 4 4 3 4 3 3 4 Planetary 7 4 4 3 4 2 3 4
F. Comments
None
Latest news
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
Wednesday, 20 March 2024
Sunspot region 3615, G1 watch
Latest forum messages
Unproven theories 346AR3654 26Growth of Cycle 25 434Unspecified geomagnetic activity 954Changelog/Featurelog 154
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 | 2024/03/28 | X1.1 |
| Last M-flare | 2024/04/27 | M3.0 |
| Last geomagnetic storm | 2024/04/26 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2024 | 104.9 -19.8 |
| Last 30 days | 139.7 +33.3 |