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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
8 AUG-9 AUG STORM G2 STORM G3
9 AUG-10 AUG STORM G1 STORM G2
10 AUG-11 AUG 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)
7 AUG-8 AUG QUIET QUIET 21:00-00:00 QUIET QUIET 03:00-06:00
QUIET 03:00-06:00

Additional Comments

The solar wind speed is currently at background levels.
We anticipate the arrival of a coronal mass ejection (CME) during the first forecast period. The CME is expected to interact with the High Speed Stream (HSS) from a coronal hole, increasing the chances of geomagnetic activity to reach up to storm levels (STORM G3). The solar wind speed is expected to remain elevated due to the influence of the coronal hole sustaining geomagnetic disturbances throughout the weekend.
Time of forecast: 08 Aug 2025
© UKRI