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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
12 NOV-13 NOV STORM G3 STORM G5
13 NOV-14 NOV STORM G1 STORM G2
14 NOV-15 NOV 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)
11 NOV-12 NOV STORM G3 STORM G4 00:00-06:00 STORM G3 STORM G5 00:00-03:00

Additional Comments

Geomagnetic conditions became enhanced overnight to STORM G4 after the predicted arrival of two CMEs from the 9th and 10th of November.
Another X5.1 flare produced a fast full halo CME on the 11th which is anticipated to reach Earth during the first forecast interval although arrival time is uncertain. With solar wind parameters and geomagnetic field already being disturbed this will likely lead to further significant geomagnetic activity with STORM G3 conditions likely to dominate and even spells of up to STORM G5 possible. Residual effects from these events will continue into the second interval whilst gradually on a declining trend.
Time of forecast: 12 Nov 2025
© UKRI