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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
29 APR-30 APR QUIET STORM G1
30 APR-1 MAY ACTIVE STORM G2
1 MAY-2 MAY 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 APR-29 APR QUIET QUIET 18:00-21:00 QUIET QUIET 18:00-21:00

Additional Comments

We anticipate the arrival of a high-speed stream from a recurrent coronal hole during the latter half of the first forecast period, enhancing solar wind speeds and increasing the likelihood of geomagnetic activity levels reaching STORM G1 with a small chance of STORM G2 during day two.
The Earth may receive a glancing blow from a slow CME which lifted from the Sun on the 26-APR. Confidence is very low due to lack of imagery but this has an outside chance of enhancing activity levels in the 2nd interval, especially if any impact combines with the coronal hole high speed stream.
Time of forecast: 29 Apr 2026
© UKRI