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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
25 JUN-26 JUN ACTIVE STORM G1
26 JUN-27 JUN ACTIVE STORM G1
27 JUN-28 JUN 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)
24 JUN-25 JUN ACTIVE STORM G1 03:00-06:00 ACTIVE STORM G1 03:00-06:00

Additional Comments

Over the past 24 hours solar wind velocity increased further due to coronal hole (CH) effects combined with a possible coronal mass ejection (CME) arrival, resulting in ACTIVE conditions and a brief STORM G1 interval.
The solar wind speed is still high at around 650 km/s hence a similar level of activity could persist as we transition into the high-speed stream (HSS) from the trans-equatorial CH.
The current level of activity is anticipated to gradually decline toward day three of this forecast.
Time of forecast: 25 Jun 2026
© UKRI