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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
31 MAR-1 APR STORM G1 STORM G3
1 APR-2 APR ACTIVE STORM G1
2 APR-3 APR ACTIVE STORM G1

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)
30 MAR-31 MAR QUIET QUIET 12:00-15:00 QUIET ACTIVE 12:00-15:00

Additional Comments

A coronal mass ejection (CME) launched yesterday, associated with an X1.4 solar flare, is expected to arrive within the first forecast interval. Modelling suggests that the bulk of the ejecta may miss Earth, however a glancing blow is possible. There is a chance of STORM conditions up to STORM G3 levels depending on the strength of the CME impact.
A centrally positioned coronal hole is currently facing Earth. High-speed solar wind from this coronal hole should arrive from the second forecast period onwards giving ACTIVE to STORM G1 conditions.
There is increased uncertainty about the potential strength of the CME impact due to possible interactions between the fast solar wind from the coronal hole and the coronal mass ejection.
Time of forecast: 31 Mar 2026
© UKRI