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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
15 MAY-16 MAY QUIET STORM G1
16 MAY-17 MAY QUIET ACTIVE
17 MAY-18 MAY 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)
14 MAY-15 MAY QUIET ACTIVE 03:00-06:00 QUIET ACTIVE 15:00-21:00

Additional Comments

Solar wind speeds are currently elevated due to coronal hole influence. Another coronal hole high speed stream is expected to become geo-effective during the first period. In addition to this, the Earth may encounter glancing blows from a couple of CMEs although confidence is low as most of the ejecta should miss. This may lead to some ACTIVE geomagnetic conditions with some possible isolated STORM G1 spells.
Coronal hole effects anticipated to continue into the second period with background conditions returning in the third. A recent filament eruption may have some impact late during the third period however further analysis is needed as more imagery becomes available.
Time of forecast: 15 May 2025
© UKRI