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BGS Global Geomagnetic Activity Forecast

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

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)
19 OCT-20 OCT QUIET QUIET 00:00-06:00 QUIET QUIET 03:00-06:00

Additional Comments

A high-speed stream from a coronal hole (CH) is expected to become geoeffective today, giving a chance of up to STORM G1 conditions in the first forecast interval
Any activity should then gradually decline throughout the remainder of the forecast as CH influence diminishes.
Time of forecast: 20 Oct 2026
© UKRI