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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
11 AUG-12 AUG ACTIVE STORM G1
12 AUG-13 AUG QUIET ACTIVE
13 AUG-14 AUG QUIET QUIET

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)
10 AUG-11 AUG QUIET QUIET 21:00-00:00 QUIET QUIET 03:00-06:00
QUIET 03:00-06:00

Additional Comments

A Coronal Mass Ejection (CME) associated with a filament eruption on 8-AUG could deliver a glancing blow during the 1st interval, increasing the likelihood of ACTIVE to isolated STORM G1 periods.
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.
A high speed stream from a northern coronal hole is anticipated to arrive toward the end of the week.
Time of forecast: 11 Aug 2026
© UKRI