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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
4 NOV-5 NOV QUIET ACTIVE
5 NOV-6 NOV QUIET ACTIVE
6 NOV-7 NOV 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)
3 NOV-4 NOV QUIET ACTIVE 00:00-03:00 QUIET ACTIVE 00:00-03:00

Additional Comments

The Interplanetary Magnetic Field IMF) Bz component remained mostly negative througout last 24 hours, with solar speed hovering around 400 km/s leading some brief ACTIVE geomagnetic periods. Similar activity is likely in the next 24 hours due to a mix of residual coronal hole effects and a weak coronal mass ejection (CME) that arrived shortly after midnight on the 3-NOV.
A number of M-class flares and CMEs have been observed over the last 24 hours. One of the CMEs could give a glancing blow to Earth's magnetic field on the 6-NOV.
In addition a Co-rotating Interactive Region (CIR) ahead of a fast solar wind stream from a large recurrent coronal hole is anticipated to become geoeffective during the latter half of the third interval leading to further enhanced geomagnetic activity.
Time of forecast: 04 Nov 2025
© UKRI