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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
29 MAY-30 MAY QUIET ACTIVE
30 MAY-31 MAY QUIET ACTIVE
31 MAY-1 JUN QUIET ACTIVE

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)
28 MAY-29 MAY QUIET ACTIVE 21:00-00:00 QUIET ACTIVE 21:00-00:00

Additional Comments

Coronal Hole influence looks likely to continue throughout the weekend, with the High Speed Stream from a new small Coronal Hole potentially becoming geoeffective after the current stream starts to wane, however this is a small and new feature and is unlikely to produce any significant enhancement.
A number of small CMEs have been observed from near the South East over the past day or two, and although these appear to be mostly directed away from Earth, there is a small chance we could see a weak glance over the weekend. Given the the available data, any possible impact is likely to be very small and shouldn't enhance activity much.
Overall, geomagnetic activity should be QUIET with some occasional ACTIVE periods throughout the forecast period. There may be a very slight chance of a brief STORM G1 should all the previously mentioned factors align, but this is thought to be unlikely.
Time of forecast: 29 May 2026
© UKRI