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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
4 SEP-5 SEP QUIET QUIET
5 SEP-6 SEP QUIET STORM G1
6 SEP-7 SEP QUIET 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)
3 SEP-4 SEP QUIET QUIET 18:00-21:00 QUIET QUIET 03:00-06:00

Additional Comments

A coronal hole high-speed wind stream (HSS) will be arriving at the start of the second forecast interval. Chances of minor storm conditions depend on whether the Bz component of the interplanetary magnetic field will sustain a southward orientation. Due to the large longitudinal extent of this recurrent coronal hole, HSS's influence on the geomagnetic conditions can last several days. Enhanced geomagnetic activities are expected during the second and third forecast intervals.
Filament eruptions from 03 September are determined to be far too north and west. There are no Earth-directed coronal mass ejections observed.
Time of forecast: 04 Sep 2025
© UKRI