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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
14 AUG-15 AUG ACTIVE STORM G1
15 AUG-16 AUG QUIET ACTIVE
16 AUG-17 AUG ACTIVE STORM G2

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)
13 AUG-14 AUG QUIET ACTIVE 21:00-00:00 QUIET ACTIVE 06:00-09:00

Additional Comments

The onset of a high-speed solar wind stream from a northern coronal hole is expected during the first interval. ACTIVE with a chance of STORM G1 conditions are anticipated. The coronal hole influence could persist into the 2nd period.
There have been two Coronal Mass Ejections (CME) observed leaving the Sun during the past 24 hours: one following a filament lift off on 13-AUG from the SE quadrant and a second associated with C4.1 X-ray flare at approximately 06:40 UT on 14-AUG. Based on limited imagery and data about these events we estimate their arrival during the latter half of the 3rd interval. ACTIVE up-to STORM G2 periods possible on impact.
Time of forecast: 14 Aug 2026
© UKRI