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BGS Global Geomagnetic Activity Forecast

Forecast period
(noon-to-noon GMT) 		Forecast Global Activity level
Average Max
13 SEP-14 SEP ACTIVE STORM G2
14 SEP-15 SEP QUIET STORM G1
15 SEP-16 SEP QUIET ACTIVE

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)
12 SEP-13 SEP STORM G1 STORM G3 18:00-21:00 STORM G2 STORM G3 18:00-21:00

Additional Comments

Geomagnetic activity intensified in the past 24 hours and reached major storm levels in response CME influence. Elevated conditions are expected to continue throughout the first forecast period, with chances of ACTIVE to STORM G2 intervals due to the anticipated impact of second CME observed leaving the Sun on 11-SEP.
The X-class flare reported yesterday is from a region on the SE quadrant and doesn't appear to have a CME associated with it.
A high speed stream from a negative polarity coronal hole could arrive late in the second forecast interval, or early in the third. Effects from this are not anticipated to be significant, but it may lead to some ACTIVE periods.
Time of forecast: 13 Sep 2024
© UKRI