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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
5 DEC-6 DEC QUIET ACTIVE
6 DEC-7 DEC QUIET STORM G1
7 DEC-8 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)
4 DEC-5 DEC QUIET ACTIVE 12:00-15:00 QUIET ACTIVE 12:00-21:00

Additional Comments

Solar wind speed remains elevated due to ongoing coronal hole high speed stream (CH HSS) influence and this is likely to persist throughout, albeit it should decline somewhat as the weekend progresses.
There is a low probability of some weak coronal mass ejection (CME) influence from the events mentioned in yesterday's forecast during the 2nd interval, hence isolated ACTIVE periods are possible, with a chance of an occasional peak of up-to STORM G1.
Time of forecast: 05 Dec 2025
© UKRI