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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
12 DEC-13 DEC QUIET STORM G1
13 DEC-14 DEC QUIET STORM G1
14 DEC-15 DEC QUIET ACTIVE

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)
11 DEC-12 DEC QUIET STORM G1 18:00-21:00 QUIET ACTIVE 15:00-21:00

Additional Comments

Geomagnetic activity is expected to remain slightly elevated during the weekend due to the ongoing passing of recent coronal mass ejections (CMEs) and the effects of upcoming high-speed stream from a large northern coronal hole.
Increased chances of further ACTIVE and STORM G1 periods are anticipated.
Time of forecast: 12 Dec 2025
© UKRI