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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
22 OCT-23 OCT QUIET ACTIVE
23 OCT-24 OCT QUIET QUIET
24 OCT-25 OCT 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)
21 OCT-22 OCT ACTIVE STORM G1 21:00-00:00 ACTIVE STORM G1 21:00-00:00

Additional Comments

Geomagnetic activity was further enhanced overnight as a result of another increase in solar wind velocity due to a coronal hole (CH) high-speed stream (HSS). Some ACTIVE periods are possible in the first forecast interval as conditions wane.
A HSS from a recurrent northern CH may become geoeffective in the latter half of 24-Oct although there was minimal activity associated with this CH on the last rotation. Another more centrally-located CH has opened up on the solar disc. There is some uncertainty around any potential activity from this as it may have formed too late to have an impact but there is a chance of up to ACTIVE spells on day three should any associated fast wind arrive.
Several coronal mass ejections (CMEs) were observed 21-Oct. Initial analysis suggests there is a chance of a glancing blow on 25-Oct, although likely later in the day and therefore beyond this forecast.
Time of forecast: 22 Oct 2026
© UKRI