|Northern lighs: Green corona credit: Phil Hart|
A coronal mass ejection (CME) hit Earth's magnetic field at 0617 UT on Jan. 22nd.
At first the impact did not appear to be a strong one: the solar wind speed barely lifted itself to ~400 km/s when the CME passed by.
Now, however, in the wake of the CME, a dense and increasingly geoeffective solar wind stream is blowing around Earth, setting the stage for possible auroras on the night of Jan. 22nd.
Visit Spaceweather.com for more information on northern lights.
wikiinfo: Aurora (Northern lights)