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G2 (moderate) Geomagnetic Storm Watch Issued for 11 October 2021

Status Report From: Space Weather Prediction Center (NOAA)
Posted: Monday, October 11, 2021


(Moderate) geomagnetic storm conditions are possible on 11 Oct due to the anticipated arrival of a CME from 09 Oct. G1 (Minor) geomagnetic storm conditions are possible on 11-12 Oct. 

Region 2882 (N17, L=157) produced an M1/2b flare (with Type-II and IV radio emissions) at 09/0638 UTC, and an associated full-halo CME was observed in LASCO C2 imagery beginning at 09/0712 UTC. 

Event analysis and model output suggest CME arrival around midday on 11 Oct, with lingering effects persisting into 12 Oct.  


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