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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
29 JUN-30 JUN QUIET STORM G1
30 JUN-1 JUL ACTIVE STORM G2
1 JUL-2 JUL ACTIVE STORM G2

For more information about the forecast and activity categories see
geomag.bgs.ac.uk/education/activitylevels.html

Activity during last 72 hours

Global   Local (UK)
Date Average Max At time (UTC) Average Max At time (UTC)
26 JUN-27 JUN QUIET QUIET 15:00-00:00 QUIET QUIET 18:00-21:00
27 JUN-28 JUN QUIET QUIET 21:00-06:00 QUIET QUIET 15:00-18:00
QUIET 21:00-00:00
28 JUN-29 JUN QUIET QUIET 03:00-06:00 QUIET QUIET 03:00-09:00

Additional Comments

After recent passing of the coronal hole high-speed stream, solar wind parameters gradually returned to background levels during the weekend.
A complex coronal mass ejection (CME) associated with a filament eruption close to the centre of the solar disc was observed late on 26-Jun. Although majority of the ejecta are directed southward, the elongated structure of the CME may result in an Earth-directed component, with the predicted arrival on 30-Jun. A second impact may follow the day after due to a possible arrival of a faint CME seen on 27-Jun, however confidence is low and further analysis required.
Initially QUIET geomagnetic conditions are expected to reach elevated levels during the second and third forecast period, with chances of STORM G2 intervals.
Time of forecast: 29 Jun 2026
© UKRI