Viewing archive of Sunday, 21 September 2025

Geophysical report

Solar and Geophysical Activity Summary 2025 Sep 21 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 264 Issued at 0245Z on 21 Sep 2025 This report is compiled from data received at SWO on 20 Sep
A. Energetic Events
Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 0007 0007 0007                       480                           
 0145 0145 0145                       140                           
 0749 0749 0749                       100                           
 0825 0825 0826                       230                           
 0829 0829 0830                       100                           
 0923 0923 0923                       230                           
 1343 1343 1343                       130                           
 1346 1347 1347                       160                           
 1654 1654 1654                       140                           
 1850 1850 1850                       100                           
B. Proton Events
None
C. Geomagnetic Activity Summary
Field conditions were at quiet levels.
D. Stratwarm
Not available
E. Daily Indices: (real-time preliminary/estimated values)
10 cm 166  SSN 155  Afr/Ap 005/005   X-ray Background B9.4
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 5.0e+06   GT 10 MeV 1.6e+04 p/(cm2-ster-day)
(GOES-18 satellite synchronous orbit W137 degrees)
Daily Electron Fluence
GT 2 MeV 2.40e+08 e/(cm2-ster-day)
(GOES-19 satellite synchronous orbit W75 degrees)
3 Hour K-indices
Boulder 1 2 3 1 2 2 1 1 Planetary ? ? ? ? ? ? ? ? 
F. Comments
  None

All times in UTC

<< Go to daily overview page

Latest news

Support 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!

No Ads on SWL Pro!
No Ads on SWL Pro! Subscriptions
Donations
Support SpaceWeatherLive.com! Donate
Support SpaceWeatherLive with our merchandise
Check out our merchandise

Latest alerts

Get instant alerts!

Space weather facts

Last X-flare2025/12/01X1.9
Last M-flare2025/12/04M6.0
Last geomagnetic storm2025/12/04Kp5 (G1)
Spotless days
Last spotless day2022/06/08
Monthly mean Sunspot Number
November 202591.8 -22.8
December 2025186 +94.2
Last 30 days106.3 +12.6

This day in history*

Solar flares
12006X12.9
22006M2.63
32024M2.5
42014M2.22
52023M1.5
DstG
11958-176G3
21959-166G4
31989-79G1
41977-72G1
51982-55
*since 1994

Social networks