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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
23 MAR-24 MAR ACTIVE STORM G2
24 MAR-25 MAR ACTIVE STORM G1
25 MAR-26 MAR QUIET STORM G1

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)
20 MAR-21 MAR STORM G1 STORM G3 00:00-03:00 STORM G1 STORM G2 00:00-03:00
21 MAR-22 MAR ACTIVE STORM G2 09:00-12:00 ACTIVE STORM G2 09:00-12:00
22 MAR-23 MAR STORM G1 STORM G3 15:00-18:00 STORM G1 STORM G3 15:00-00:00
STORM G3 21:00-00:00

Additional Comments

Solar wind speed remains elevated due to ongoing coronal hole influence which is likely to persist for the next few days, although it is anticipated to slowly decline as the week progresses. The CMEs from last week have now passed although some residual enhancement could remain. A CME associated with a filament eruption was observed yesterday and although the bulk of the material does not appear Earth-directed, a glance may be possible near the end of the forecast period.
Overall, some ACTIVE periods are still to be expected over the next couple of days, with an ongoing but reducing chance of some occasional periods of minor storm (likely G1, but we cannot rule out a slight chance it could peak briefly at STORM G2). By day three more QUIET conditions are possible, although the potential arrival of the glancing CME later in the day may produce some enhancement, perhaps up to STORM G1.
Time of forecast: 23 Mar 2026
© UKRI