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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
9 DEC-10 DEC ACTIVE STORM G2
10 DEC-11 DEC ACTIVE STORM G1
11 DEC-12 DEC QUIET STORM G1

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)
8 DEC-9 DEC QUIET QUIET 00:00-03:00 QUIET QUIET 00:00-03:00

Additional Comments

The arrival of the coronal mass ejection (CME) from 06-Dec is still anticipated early during the first forecast period, increasing the chances of STORM G1 and G2 intervals.
Active regions in the southwest and northwest produced multiple solar flares in the last 24 hours. The associated CMEs are not believed to have significant Earth-directed components, however glancing impact cannot be fully ruled out. Therefore, elevated geomagnetic conditions are expected over the next few days.
Time of forecast: 09 Dec 2025
© UKRI