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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
28 APR-29 APR QUIET QUIET
29 APR-30 APR QUIET STORM G1
30 APR-1 MAY ACTIVE STORM G2

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)
27 APR-28 APR QUIET QUIET 15:00-18:00 QUIET QUIET 03:00-06:00

Additional Comments

Solar wind speed has returned to background levels, and geomagnetic activity has been QUIET. We anticipate the arrival of a high-speed stream from a recurrent coronal hole during the second forecast period, enhancing solar wind speeds and increasing the likelihood of geomagnetic activity levels reaching STORM G1 or even up-to STORM G2.
There remains a degree of uncertainty regarding the presence of a CME associated with M6 - X-ray flare on 26-APR. Unfortunately there is limited imagery and large data gap in the SOHO and STEREO coronagraph imagery available during this event. If there is an Earth-directed CME it is estimated that an arrival may occur during the third forecast interval which could enhance activity levels.
Time of forecast: 28 Apr 2026
© UKRI