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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
19 MAY-20 MAY QUIET STORM G2
20 MAY-21 MAY QUIET ACTIVE
21 MAY-22 MAY 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)
18 MAY-19 MAY QUIET ACTIVE 03:00-06:00 QUIET ACTIVE 03:00-06:00

Additional Comments

There was a small shock in the solar wind at around 06:30 UT this morning, which is likely to mark the arrival of a coronal mass ejection (CME). This has already led to an ACTIVE period of geomagnetic conditions this morning, and may lead to further ACTIVE periods, with a chance for some brief, isolated STORM G1 periods.
There is still a possibility of another CME arrival during the first forecast interval, which may enhance geomagnetic activity further. If this CME arrives, it is likely to cause some ACTIVE and STORM G1 periods, with a very slight chance for STORM G2.
Time of forecast: 19 May 2026
© UKRI