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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
1 DEC-2 DEC QUIET ACTIVE
2 DEC-3 DEC QUIET QUIET
3 DEC-4 DEC QUIET ACTIVE

For more information about the forecast and activity categories see
geomag.bgs.ac.uk/education/activitylevels.html

Activity during last 72 hours

Global   Local (UK)
Date Average Max At time (UTC) Average Max At time (UTC)
28 NOV-29 NOV ACTIVE ACTIVE 12:00-18:00 QUIET ACTIVE 12:00-15:00
ACTIVE 03:00-09:00 ACTIVE 06:00-09:00
29 NOV-30 NOV ACTIVE ACTIVE 12:00-15:00 ACTIVE ACTIVE 12:00-15:00
30 NOV-1 DEC QUIET ACTIVE 00:00-03:00 QUIET ACTIVE 00:00-03:00

Additional Comments

Solar wind speed remains moderately elevated due to the continuing influence of a coronal hole high speed stream (CHHSS), and this should slowly decline over the next 24 hours. Whilst the solar wind speed is above background level there is chance for further brief ACTIVE geomagnetic conditions.
A large trans-equatorial coronal hole (CH) is currently in Earth-facing position. We may start to see enhancement in the solar wind from this CH late in the 3rd forecast period.
An X1.9 class solar flare occurred on 1-Dec at the SE limb. However, there are currently no known Earth-directed CMEs.
Time of forecast: 01 Dec 2025
© UKRI