Technology & Science
Successive X-Class Flares Trigger G3 Geomagnetic Storm Watch for Nov 11-12
After three Earth-directed CMEs launched Nov 7-10, NOAA and the UK Met Office escalated space-weather alerts from minor (G1) on Nov 10 to strong (G3) geomagnetic-storm potential for the nights of Nov 11-12, promising aurora sightings far below usual latitudes.
Focusing Facts
- The Nov 9 X1.7 flare caused an R3 radio blackout at 02:30 EST and its CME is forecast to strike Earth late Nov 11, prompting NOAA’s G2 watch (later upgradeable to G3).
- Met Office bulletins on Nov 10 warned that the same CME train could push auroras into northern England and possibly Cornwall during the expected peak around 00:00 UTC on Nov 12.
- NOAA modelling suggests the faster Nov 10 CME may overtake the Nov 7 ejecta, forming a ‘cannibal CME’ capable of a strong G3 storm and aurora visibility across 22 U.S. states.
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