Spaceweather.

SUBSIDING GEOMAGNETIC STORM: A G1-class geomagnetic storm caused by the impact of a CIR on Jan. 8th (see below) is subsiding now. The storm is over. Arctic auroras remain possible as Earth enters a moderately fast stream of solar wind flowing behind the CIR.

CIR IMPACT SPARKS BRIGHT AURORAS: A co-rotating interaction region (CIR) hit Earth's magnetic field on Jan. 8th, igniting some of the best Arctic auroras in years.


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