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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
2 OCT-3 OCT ACTIVE STORM G2
3 OCT-4 OCT ACTIVE STORM G1
4 OCT-5 OCT ACTIVE 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)
1 OCT-2 OCT STORM G1 STORM G3 03:00-06:00 STORM G1 STORM G3 18:00-21:00
STORM G3 03:00-06:00

Additional Comments

Solar wind speed remains elevated due to ongoing Coronal Hole influence, which is likely to persist for the next few days, although we anticipate it should decline somewhat towards the end of the 3-day forecast period. Given the recent geomagnetic enhancement due to High Speed Stream effects and the passage of a slow CME, combined with the current High Speed Stream, further activity is expected with ACTIVE conditions dominating for several days and a likelihood of further periods of Minor Storm (G1) and we can't rule out a chance that it could peak at STORM G2, especially during the first forecast period.
Time of forecast: 02 Oct 2025
© UKRI