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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
10 AUG-11 AUG QUIET STORM G1
11 AUG-12 AUG ACTIVE STORM G1
12 AUG-13 AUG QUIET ACTIVE

For more information about the forecast and activity categories see
geomag.bgs.ac.uk/education/activitylevels.html

Activity during last 72 hours

Global   Local (UK)
Date Average Max At time (UTC) Average Max At time (UTC)
7 AUG-8 AUG QUIET ACTIVE 09:00-12:00 QUIET ACTIVE 09:00-12:00
8 AUG-9 AUG ACTIVE STORM G2 18:00-21:00 ACTIVE STORM G2 18:00-21:00
9 AUG-10 AUG QUIET QUIET 21:00-03:00 QUIET QUIET 21:00-03:00

Additional Comments

The solar wind speed is currently elevated, increasing the likelihood of geomagnetic activity above background levels.
A filament eruption on 8 August generated a CME. Analysis of available imagery suggests that the CME is likely to pass north of Earth; however, a glancing impact remains possible. We anticipate that the CME may arrive at Earth around midday (UT) on 11 August, increasing the likelihood of isolated ACTIVE to STORM G1 intervals towards the end of the first forecast period and the beginning of the second.
We expect the enhancement in solar wind speed to be short-lived, and solar wind conditions to return to background levels by the end of the third forecast period.
Time of forecast: 10 Aug 2026
© UKRI