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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 ACTIVE STORM G2
22 APR-23 APR ACTIVE STORM G2
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 72 hours

Global   Local (UK)
Date Average Max At time (UTC) Average Max At time (UTC)
18 APR-19 APR QUIET ACTIVE 00:00-03:00 QUIET ACTIVE 00:00-06:00
19 APR-20 APR ACTIVE STORM G1 00:00-03:00 ACTIVE STORM G2 00:00-03:00
20 APR-21 APR ACTIVE STORM G1 06:00-09:00 ACTIVE STORM G1 06:00-09:00

Additional Comments

Solar wind speed is currently at elevated levels due to the high speed stream (HSS) influence from the large coronal hole located in the southern solar disc. The HSS effects are expected to continue throughout the first two forecast intervals, resulting in increased geomagnetic activity with high chances of STORM G2 periods.
Time of forecast: 21 Apr 2025
© UKRI