Viewing archive of Tuesday, 21 April 2026

Geophysical report

Joint USAF/NOAA Solar and Geophysical Activity Summary

A. Energetic Events

Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 0100 0100 0100                       100                           
 0101 0101 0101                       100                           
 0204 0204 0204                       300                           
 0237 0237 0237                       100                           
 0514 0514 0514                       100                           
 0721 0721 0721                       110                           
 0732 0732 0732                       150                           
 0833 0845 0852  4419 N16W11 C1.0  Sf 210                           
 0947 0947 0948                       100                           
 1458 1514 1525              C1.6     120                           

B. Proton Events

C. Geomagnetic Activity Summary

D. Stratwarm

E. Daily Indices: (real-time preliminary/estimated values)

10 cm 105  SSN 046  Afr/Ap 013/024   X-ray Background B3.4
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 1.3e+06   GT 10 MeV 1.8e+04 p/(cm2-ster-day)
(GOES-18 satellite synchronous orbit W137 degrees)
Daily Electron Fluence
GT 2 MeV 3.70e+07 e/(cm2-ster-day)
(GOES-19 satellite synchronous orbit W72 degrees)
3 Hour K-indices
Boulder 1 2 4 4 3 4 3 4 Planetary 1 2 4 4 3 5 5 4 

F. Comments

  None

All times in UTC

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