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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
3 JUN-4 JUN QUIET STORM G1
4 JUN-5 JUN STORM G2 STORM G4
5 JUN-6 JUN STORM G1 STORM G3

For more information about the forecast and activity categories see
geomag.bgs.ac.uk/education/activitylevels.html

Activity during last 24 hours

Global   Local (UK)
Date Average Max At time (UTC) Average Max At time (UTC)
2 JUN-3 JUN QUIET QUIET 18:00-21:00 QUIET QUIET 18:00-21:00
QUIET 00:00-03:00

Additional Comments

Solar wind speeds have started to climb due to the arrival of the predicted coronal hole influence which may cause some moderate geomagnetic enhancements in the first period.
An M9.3 flare erupted from near centre solar disc early this morning. Imagery shows a feint halo CME which is making analysis difficult, although an Earth directed component is likely. This was followed by another M7 flare from the same location, however limited imagery is available and further analysis will be required to determine parameters of an associated CME.
If this second CME combines with the former we can expect significant geomagnetic activity of up to STORM G4.
Time of forecast: 03 Jun 2026
© UKRI