Geophysical report

Viewing archive of Thursday, 4 June 2026

Solar and Geophysical Activity Summary 2026 Jun 04 0245 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 155 Issued at 0245Z on 04 Jun 2026 This report is compiled from data received at SWO on 03 Jun

A. Energetic Events

Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 0057      0103                                     II              
 0122      0500                                        IV           
 0122 0136 0143  4455 N13W11 M9.3  Sf 55000  360                    
 0649 0700 0707  4455 N14W13 M7.7  1b 880    540    II              
 1119 1128 1135              X1.0     640    250                    
 1137 1137 1216  4455 N13W15       1n                  IV           
 1527 1536 1545              C1.7     170

B. Proton Events

None

C. Geomagnetic Activity Summary

The geomagnetic field reached unsettled levels

D. Stratwarm

Not available

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

10 cm 147  SSN 141  Afr/Ap 011/010   X-ray Background B9.6
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 2.2e+05   GT 10 MeV 1.8e+04 p/(cm2-ster-day)
(GOES-18 satellite synchronous orbit W137 degrees)
Daily Electron Fluence
GT 2 MeV 2.40e+07 e/(cm2-ster-day)
(GOES-19 satellite synchronous orbit W72 degrees)
3 Hour K-indices
Boulder 3 2 1 2 2 3 3 3 Planetary 3 2 2 2 2 2 2 3

F. Comments

  None

All times in UTC

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Space weather facts

Last X-flare	2026/06/03	X1.0
Last M-flare	2026/06/03	M7.76
Last geomagnetic storm	2026/05/16	Kp6- (G2)

Spotless days
Last 365 days	3 days
2026	3 days (2%)
Last spotless day	2026/02/24

Monthly mean Sunspot Number
May 2026	101.4 +22.1
June 2026	144.3 +42.8
Last 30 days	99 +5.2

This day in history*

Solar flares
1	2001	M3.61
2	2024	M3.5
3	2024	M2.63
4	2000	M2.27
5	2013	M1.87

		Dst	G
1	1991	-223	G4
2	1960	-88	G1
3	1967	-85	G3
4	1978	-71	G2
5	1993	-60	G2

*since 1994

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