Warning!

Javascript is disabled on this browser.
Javascript must be enabled for this website to display and function correctly.

BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
16 SEP-17 SEP QUIET STORM G1
17 SEP-18 SEP QUIET ACTIVE
18 SEP-19 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)
15 SEP-16 SEP QUIET ACTIVE 00:00-03:00 QUIET ACTIVE 00:00-03:00

Additional Comments

Solar wind speeds received 2 brief enhancements yesterday likely due to weak CME and coronal hole effects. Coronal hole influence is anticipated to continue through the first two forecast periods before gradually waning in the third. The first period may also see some glancing effects from a CME from a filament eruption which left the Sun on the 14th. This may result in some isolated STORM G1 spells of geomagnetic activity.
Time of forecast: 16 Sep 2026
© UKRI