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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
15 SEP-16 SEP QUIET STORM G1
16 SEP-17 SEP QUIET STORM G1
17 SEP-18 SEP QUIET ACTIVE

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 SEP-15 SEP QUIET ACTIVE 15:00-18:00 QUIET ACTIVE 15:00-18:00

Additional Comments

Solar wind speeds are expected to become enhanced during the first period due to a northerly located coronal hole. There were two filament eruptions on the 13th and 14th resulting in CMEs that may glance the Earth late in the first period and into the second. This is likely to result in some ACTIVE geomagnetic activity with STORM G1 conditions possible especially with combined CME and and coronal hole effects.
Time of forecast: 15 Sep 2026
© UKRI