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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 QUIET ACTIVE
21 MAR-22 MAR QUIET ACTIVE
22 MAR-23 MAR ACTIVE STORM G1

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 ACTIVE 18:00-21:00 QUIET ACTIVE 18:00-21:00

Additional Comments

Over the first two forecast periods there is a chance of up to three coronal mass ejection (CME) impacts. Confidence in each arrival is low; most are modelled as glancing blows and therefore may miss Earth. However, if one or more arrive ACTIVE, or possibly STORM G1, levels could be reached.
From the third forecast period another high-speed solar wind stream from a centrally located coronal hole should arrive. There is also a chance of another glancing blow from a CME observed early on the 19th. A combination of these effects could bring ACTIVE to STORM G1 conditions.
Time of forecast: 20 Mar 2025
© UKRI