Viewing archive of Thursday, 14 September 2017

Geophysical report

Solar and Geophysical Activity Summary 2017 Sep 14 0245 UTC
Prepared by the NOAA © SWPC and processed by

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 Sep
A. 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

<< Go to daily overview page

Latest news


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:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2019/10/26Kp5 (G1)
Number of spotless days in 2020:16
Current stretch spotless days:14

This day in history*

Solar flares
*since 1994

Social networks