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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
23 JUL-24 JUL QUIET STORM G1
24 JUL-25 JUL QUIET ACTIVE
25 JUL-26 JUL QUIET QUIET

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)
22 JUL-23 JUL QUIET QUIET 12:00-15:00 QUIET QUIET 12:00-18:00

Additional Comments

Solar wind speeds have increased further overnight due to ongoing coronal hole effects, and are expected to remain elevated throughout the first forecast interval. A coronal mass ejection (CME) that left the Sun on 21 July has also been assessed to be partially Earth-directed. Whilst the bulk of the CME is expected to pass to the north, a glancing blow is possible late in the first forecast interval.
ACTIVE periods of geomagnetic activity are likely during the first forecast interval, with a chance for STORM G1 periods, particularly if the CME does become geoeffective.
Time of forecast: 23 Jul 2026
© UKRI