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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
29 SEP-30 SEP QUIET QUIET
30 SEP-1 OCT QUIET QUIET
1 OCT-2 OCT ACTIVE 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)
28 SEP-29 SEP QUIET QUIET 00:00-03:00 QUIET QUIET 00:00-03:00

Additional Comments

A large filament erupted with an associated partial-halo coronal mass ejection (CME) yesterday afternoon(UT), 28-SEP. Analysis shows that this CME is likely to interact with the Earth's magnetic field towards the end of the forecast period, on or around the 2-OCT and on impact we could see STORM G1 periods.
Time of forecast: 29 Sep 2026
© UKRI