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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
21 APR-22 APR QUIET STORM G1
22 APR-23 APR QUIET ACTIVE
23 APR-24 APR 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)
20 APR-21 APR ACTIVE STORM G1 18:00-21:00 ACTIVE STORM G2 15:00-18:00

Additional Comments

Solar wind speed remains elevated due to ongoing Coronal Hole effects although this should slowly decline as the week progresses.
Geomagnetic activity is expected to be generally QUIET overall, with an ongoing chance of some ACTIVE periods which will reduce as Coronal Hole influence wanes. There may still be a small chance activity could peak briefly at STORM G1 on day one.
Time of forecast: 21 Apr 2026
© UKRI