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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
20 MAR-21 MAR STORM G1 STORM G3
21 MAR-22 MAR STORM G1 STORM G3
22 MAR-23 MAR ACTIVE STORM G2

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)
19 MAR-20 MAR QUIET QUIET 06:00-09:00 QUIET QUIET 03:00-06:00

Additional Comments

Solar wind parameters are starting to reach elevated levels due to the passing of the coronal mass ejections (CMEs) observed leaving the Sun between 16-18 March.
Enhanced geomagnetic conditions are expected to persist throughout the weekend due to the CME effects followed by the upcoming high-speed stream from a centrally located coronal hole. The probability of increased activity is also heightened due to the time of year being close to spring equinox.
Prolonged ACTIVE/STORM G1 periods are anticipated, with chances of STORM G3 intervals.
Time of forecast: 20 Mar 2026
© UKRI