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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
16 SEP-17 SEP ACTIVE STORM G1
17 SEP-18 SEP QUIET ACTIVE
18 SEP-19 SEP QUIET QUIET

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 SEP-16 SEP ACTIVE STORM G1 12:00-15:00 ACTIVE STORM G1 12:00-15:00
STORM G1 00:00-03:00

Additional Comments

The solar wind speed remains elevated due to the effects of a high speed stream from a large coronal hole. Solar wind conditions are expected to remain elevated during the first forecast interval, which may lead to further ACTIVE periods with a slight chance for some isolated STORM G1 periods.
Time of forecast: 16 Sep 2025
© UKRI