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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
16 DEC-17 DEC QUIET STORM G1
17 DEC-18 DEC QUIET STORM G1
18 DEC-19 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)
15 DEC-16 DEC QUIET QUIET 00:00-03:00 QUIET QUIET 00:00-03:00

Additional Comments

The solar wind speed has been steadily increasing over the last 12 hours. Coronal hole effects are expected to increase the chance of ACTIVE geomagnetic conditions, during the first and second forecast intervals. Although conditions are expected to remain largely QUIET to ACTIVE there may be a chance for some brief, isolated STORM G1 periods. Solar wind speeds are then expected to decline during the third forecast interval.
Time of forecast: 16 Dec 2025
© UKRI