Geophysical report

Viewing archive of Tuesday, 31 March 2026

Solar and Geophysical Activity Summary 2026 Mar 31 0300 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Solar and Geophysical Activity Summary

SGAS Number 090 Issued at 0245Z on 31 Mar 2026 This report is compiled from data received at SWO on 30 Mar

A. Energetic Events

Begin  Max  End  Rgn   Loc   Xray  Op 245MHz 10cm   Sweep
 0247 0319 0344  4405        X1.4            1800   II              
 0942 0942 0942                       110                           
 1205 1205 1205                       140

B. Proton Events

None

C. Geomagnetic Activity Summary

None

D. Stratwarm

Not available

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

10 cm 152  SSN 143  Afr/Ap 011/012   X-ray Background C1.0
Daily Proton Fluence (flux accumulation over 24 hrs)
GT 1 MeV 2.9e+05   GT 10 MeV 1.6e+04 p/(cm2-ster-day)
(GOES-18 satellite synchronous orbit W137 degrees)
Daily Electron Fluence
GT 2 MeV 4.70e+07 e/(cm2-ster-day)
(GOES-19 satellite synchronous orbit W72 degrees)
3 Hour K-indices
Boulder 2 3 4 3 3 2 2 2 Planetary 3 3 3 3 3 2 2 2

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	2026/06/21	M6.9
Last geomagnetic storm	2026/06/25	Kp5 (G1)

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	100.5 -0.9
Last 30 days	105.1 +6.4

This day in history*

Solar flares
1	1999	M1.47
2	1998	M1.34
3	2000	M1.33
4	2023	M1.2
5	2023	C9.7

		Dst	G
1	1967	-73	G1
2	1960	-64	G3
3	1978	-58
4	1970	-53	G2
5	2000	-53

*since 1994

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