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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
1 JUN-2 JUN QUIET ACTIVE
2 JUN-3 JUN QUIET ACTIVE
3 JUN-4 JUN QUIET STORM G1

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

Activity during last 72 hours

Global   Local (UK)
Date Average Max At time (UTC) Average Max At time (UTC)
29 MAY-30 MAY QUIET ACTIVE 18:00-21:00 QUIET STORM G1 18:00-21:00
30 MAY-31 MAY QUIET STORM G1 18:00-21:00 QUIET STORM G1 18:00-21:00
31 MAY-1 JUN QUIET QUIET 12:00-15:00 QUIET ACTIVE 12:00-15:00

Additional Comments

Solar wind speeds have been on a declining trend as coronal hole influence wanes. This is expected to continue through the first period resulting in predominantly QUIET geomagnetic conditions. However there may be some isolated enhancements due to some weak transients which may glance th Earth.
Another coronal hole high speed stream is anticipated to become geo-effective during the third period which will likely lead to some ACTIVE geomagnetic activity and possibly up to STORM G1.
Time of forecast: 01 Jun 2026
© UKRI