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Storm Category: G1 (Minor) to G4 (Strong)
Watch Begins: Wednesday, September 6, 2017
18:00 MDT

Duration: 48 Hours

Storm Watch Details:

•  On Wednesday, September 6, sunspot AR2673 unleashed a major X9-class solar flare – one of the largest in a decade. This intense event was accompanied by a very fast-moving Coronal Mass Ejection (CME) that included an Earth-directed component. Impact from this CME is expected on Thursday evening, adding to already unsettled conditions. As a result, the impact has the potential to trigger G1 (Minor) to G4 (Severe) geomagnetic storms. Observers across Canada should be on alert for active auroras in the hours following impact on September 7, with periods of activity continue overnight as Earth’s magnetic field continues to react to the incoming particles. The Space Weather Prediction Centre at the National Oceanic and Atmospheric Administration has extended the existing 48-hour G1-G3 storm watch initiated on September 6. The revised watch now extends to September 9.

Real Time Space Weather Websites:

SDO Solar Activity Data
Latest WSA/Enlil CME Arrival Time Predictions

Latest NOAA Alerts/Warnings
Current Northern Hemisphere Auroral Oval
Watch for CME Impact By Observing ACE Real Time Data