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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
2 APR-3 APR ACTIVE STORM G2
3 APR-4 APR ACTIVE STORM G2
4 APR-5 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)
1 APR-2 APR ACTIVE STORM G1 06:00-09:00 ACTIVE STORM G1 06:00-09:00

Additional Comments

The anticipated coronal mass ejection (CME) associated with a X1.4 solar flare arrived yesterday. A sudden commencement was recorded on UK magnetometers at 12:01 UT. The CME impact was weak and only minor geomagnetic disturbances were recorded.
Later yesterday, the Earth connected with the high-speed solar wind stream from a coronal hole. The solar wind speed is still rising. This has resulted in ACTIVE and STORM G1 periods. The influence of the high-speed stream is expected to continue during the first two forecast intervals before gradually waning. There is a chance of further STORM G1/G2 periods.
Around 23:00 UT yesterday an asymmetric halo CME was observed from a filament eruption. The bulk of the CME is directed to the north-west. Initial analysis suggests a glancing blow may arrive during the second forecasting period also contributing to the chance of STORM activity during the second forecast period.
Time of forecast: 02 Apr 2026
© UKRI