Viewing archive of Thursday, 14 September 2017
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 2017 Sep 14 0245 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Solar and Geophysical Activity Summary
SGAS Number 257 Issued at 0245Z on 14 Sep 2017 This report is compiled from data received at SWO on 13 SepA. Energetic Events
Begin Max End Rgn Loc Xray Op 245MHz 10cm Sweep 0538 0541 0551 2680 B1.1 1200 1719 1719 1719 140
B. Proton Events
The greater than 10 MeV proton flux reached S1
(Minor) levels with a peak flux of 98 pfu at 13/0630 UTC. The
greater than 100 MeV proton flux was below the 1 pfu
warning
threshold at the end of the period.
C. Geomagnetic Activity Summary
The geomagnetic field reached
minor storm conditions the first synoptic period, likely as
a
result of some influence from the 10 Sep far side CME. Levels
decreased to active, then to quiet as the period progressed.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 075 SSN 011 Afr/Ap 013/015 X-ray Background A1.6 Daily Proton Fluence (flux accumulation over 24 hrs) GT 1 MeV 4.4e+07 GT 10 MeV 7.0e+06 p/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) Daily Electron Fluence GT 2 MeV 1.30e+07 e/(cm2-ster-day) (GOES-13 satellite synchronous orbit W75 degrees) 3 Hour K-indices Boulder 4 4 4 3 2 2 1 1 Planetary 5 4 4 3 1 1 1 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
AR4294 / 4296 / 4298 363AR4299 M8.1 CME 2025/12/06 82New paper on the Gannon Storm 10-11 May 2024 2Electron event 10AR 4299 89
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 | 2025/12/01 | X1.9 |
| Last M-flare | 2025/12/06 | M8.1 |
| Last geomagnetic storm | 2025/12/04 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| November 2025 | 91.8 -22.8 |
| December 2025 | 167.7 +75.9 |
| Last 30 days | 107.1 +12.4 |