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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
28 OCT-29 OCT QUIET QUIET
29 OCT-30 OCT QUIET ACTIVE
30 OCT-31 OCT ACTIVE STORM G1

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 OCT-28 OCT QUIET QUIET 18:00-21:00 QUIET QUIET 18:00-21:00
QUIET 00:00-03:00

Additional Comments

A coronal hole high-speed stream (HSS) is expected to become geo-effective over the weekend, with ACTIVE conditions likely and a chance of some STORM G1 periods. A glancing blow from a coronal mass ejection (CME) may also arrive during this time, although the bulk of this is anticipated to miss Earth.
Should we see combined effects from the HSS and CME, geomagnetic activity could reach up to STORM G2 levels, however ACTIVE to STORM G1 periods are more likely.
Time of forecast: 28 Oct 2026
© UKRI