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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
27 APR-28 APR QUIET ACTIVE
28 APR-29 APR QUIET STORM G1
29 APR-30 APR ACTIVE STORM G2

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)
24 APR-25 APR QUIET ACTIVE 00:00-03:00 QUIET ACTIVE 18:00-21:00
25 APR-26 APR QUIET ACTIVE 03:00-06:00 QUIET ACTIVE 03:00-06:00
26 APR-27 APR QUIET ACTIVE 21:00-03:00 QUIET ACTIVE 21:00-00:00

Additional Comments

The Sun has been active and produced a series of C- and 6 M-class X-ray flares in the past 24 hours. The largest of which was an M6.0 flare at around 22:50 UT on 26-APR from a region located in the NW quadrant. A type II radio burst was reported associated with this together with coronal dimming observed which could indicate the presence of a coronal mass ejection (CME), however due to the lack of imagery there is some uncertainty over this. If a CME was present, and based on the source location and the speed of the type II radio burst, an estimated arrival on the 29-APR is possible.
A recurrent coronal hole in the southern solar hemisphere expected to become geoeffective during the third interval. On its last rotation it caused STORM G2 activity.
Time of forecast: 27 Apr 2026
© UKRI