Geophysical report

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Solar and Geophysical Activity Summary 2026 Apr 20 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 110 Issued at 0245Z on 20 Apr 2026 This report is compiled from data received at SWO on 19 Apr

A. Energetic Events

Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 0032 0032 0032                       340                           
 0220 0220 0220                       160                           
 0223 0223 0223                       100                           
 0332 0332 0333                       350                           
 0620 0620 0620                       150                           
 0625 0625 0625                       120                           
 0636 0636 0637                       270                           
 0641 0641 0645                       210                           
 0733 0733 0736                       1900                          
 0943 0943 0943                       120                           
 1219 1219 1219                       100                           
 1231 1231 1231                       110                           
 1833 1833 1833                       130                           
 2030 2030 2031                       290

B. Proton Events

None

C. Geomagnetic Activity Summary

Geomagnetic activity reached Moderate storm levels.

D. Stratwarm

Not available

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

10 cm 105  SSN 035  Afr/Ap 016/023   X-ray Background B3.1
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 6.4e+05   GT 10 MeV 1.7e+04 p/(cm2-ster-day)
(GOES-18 satellite synchronous orbit W137 degrees)
Daily Electron Fluence
GT 2 MeV 4.10e+07 e/(cm2-ster-day)
(GOES-19 satellite synchronous orbit W72 degrees)
3 Hour K-indices
Boulder 3 5 5 3 2 2 1 2 Planetary 4 5 6 4 3 3 2 2

F. Comments

  None

All times in UTC

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Space weather facts

Last X-flare	2026/07/04	X1.3
Last M-flare	2026/07/12	M1.19
Last geomagnetic storm	2026/07/04	Kp7+ (G3)

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2026	3 days (2%)
Last spotless day	2026/02/24

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June 2026	94.4 -7.1
July 2026	74.8 -19.6
Last 30 days	87 -20.2

This day in history*

Solar flares
1	2002	X2.61
2	2023	M5.7
3	2000	M4.77
4	2000	M4.39
5	2002	M3.24

		Dst	G
1	1959	-183	G4
2	1961	-105	G4
3	1980	-80	G3
4	1991	-78	G1
5	1982	-73	G1

*since 1994

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