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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
4 AUG-5 AUG QUIET ACTIVE
5 AUG-6 AUG QUIET ACTIVE
6 AUG-7 AUG QUIET QUIET

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)
1 AUG-2 AUG QUIET QUIET 12:00-15:00 QUIET QUIET 21:00-03:00
QUIET 21:00-03:00
2 AUG-3 AUG QUIET QUIET 21:00-00:00 QUIET QUIET 21:00-00:00
3 AUG-4 AUG QUIET ACTIVE 18:00-21:00 QUIET ACTIVE 18:00-21:00

Additional Comments

The solar wind speed is currently above average, increasing the chances of enhanced activity during the first and second periods. We expect the solar wind speed to decrease slowly, reaching background values by mid-week.
Two CMEs have been observed lifting off the sun on Sunday, August 3rd in the afternoon (UT). They are very faint and it is difficult to measure the direction due to lack of imagery. There is a low chance of a glancing blow from these between August 5th and 7th.
We continue to monitor developing activity that may be relevant for Earth and will communicate any news when it arises.
Time of forecast: 04 Aug 2025
© UKRI