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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
30 DEC-31 DEC QUIET STORM G1
31 DEC-1 JAN ACTIVE STORM G2
1 JAN-2 JAN 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)
29 DEC-30 DEC QUIET QUIET 21:00-00:00 QUIET QUIET 21:00-00:00

Additional Comments

Initially QUIET geomagnetic conditions are expected to become elevated throughout the forecast period due to the combined effects of the coronal hole high-speed stream and possible glance from a coronal mass ejection (CME) observed on the 28-Dec.
Chances of STORM G1 and brief STORM G2 intervals are expected, especially during the second forecast interval.
Time of forecast: 30 Dec 2025
© UKRI