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
12 JUN-13 JUN ACTIVE STORM G2
13 JUN-14 JUN QUIET STORM G1
14 JUN-15 JUN 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)
11 JUN-12 JUN ACTIVE STORM G1 21:00-03:00 ACTIVE STORM G1 00:00-03:00

Additional Comments

The interplanetary magnetic field (IMF) turned negative for a prolonged period overnight, resulting in sustained levels of geomagnetic activity reaching STORM G1. We expect further periods of increased levels of activity of up-to STORM G2 in the first interval due to continuing coronal hole high speed stream effects combined with a possible coronal mass ejections (CME) impact.
There are a couple small CMEs from the past 24hrs under review. Modelling suggests a slight potential for these to glance Earth during third forecast interval. In addition, a large re-current southern coronal hole could start to affect geomagnetic conditions during latter half of the 3rd interval too.
Time of forecast: 12 Jun 2025
© UKRI