Viewing archive of Monday, 13 September 2021
Geophysical report
Solar and Geophysical Activity Summary 2021 Sep 13 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 256 Issued at 0245Z on 13 Sep 2021 This report is compiled from data received at SWO on 12 SepA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 1737 1737 1737 120
B. Proton Events
None
C. Geomagnetic Activity Summary
Field conditions were at quiet
conditions.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 088 SSN 047 Afr/Ap 006/005 X-ray Background B2.2 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 5.5e+04 GT 10 MeV 4.5e+04 p/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.60e+06 e/(cm2-ster-day) (GOES-16 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 1 1 2 2 2 2 2 2 Planetary 1 1 1 2 1 1 1 2
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
AR4299 M8.1 CME 2025/12/06 471Photographing auroras 214AR4294 / 4296 / 4298 451Sporadic E and Flare activity 37Notification bug 1
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 | 2025/12/10 | M4.4 |
| Last geomagnetic storm | 2025/12/10 | Kp6+ (G2) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 155.3 +63.5 |
| Last 30 days | 109 +10.8 |