A geomagnetic storm caused by Monday's M9-class solar flare and Tuesday's CME impact is over. The aurora watch is cancelled for all but the highest latitudes around the Arctic Circle.
As expected, a CME hit Earth's magnetic field on Jan. 24th at approximately 1500 UT (10 am EST). The impact produced a G1-class geomagnetic storm and bright auroras around the Arctic Circle.
The storm subsided as it crossed the Atlantic and petered out almost completely by the time it reached North America.
- Spaceweather.com
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