Viewing archive of Friday, 21 December 2012
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 2012 Dec 21 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 356 Issued at 0245Z on 21 Dec 2012 This report is compiled from data received at SWO on 20 DecA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0306 0306 0306 140 0419 0419 0419 190 0542 0542 0542 100 0750 0750 0750 110 0815 0815 0816 140 0934 0934 0934 120 1110 1110 1110 150
B. Proton Events
None
C. Geomagnetic Activity Summary
The geomagnetic field was mostly
quiet.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 114 SSN 053 Afr/Ap 007/008 X-ray Background B2.4 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 1.6e+05 GT 10 MeV 1.1e+04 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W74 degrees) Daily Electron Fluence GT 2 MeV 9.90e+06 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W74 degrees) 3 Hour K-indices Boulder 1 2 2 2 2 3 2 1 Planetary 0 2 2 1 3 3 2 1
F. Comments
None
All times in UTC
Latest news
Sunday, 7 December 2025
M8.1 solar flare with earth-directed CME
Monday, 1 December 2025
X1.9 solar flare, Coronal hole faces Earth
Friday, 14 November 2025
X4.0 solar flare
Latest forum messages
Coronal Hole 06 58Geminid Meteor Shower 29Incoming & Unnumbered Active Regions 39Current Farside Activity 254Returning Carrington 14
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 | 2025/12/08 | X1.1 |
| Last M-flare | 2025/12/12 | M1.1 |
| Last geomagnetic storm | 2025/12/12 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 128 +36.2 |
| Last 30 days | 110.1 +18.9 |